#help-with-arduino

1 messages · Page 13 of 1

charred salmon
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Interesting. I've been working with a .96" version of that display, but on SPI and it seems to be happy with no delay.
Unless my init sequence is just naturally slow enough that it's fine.

#

Maybe it's the 3ms delay I have while initializing my IO expander. Which would be interesting because that's before even turning on the charge pump option on the SSD1306

north stream
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It could be the logic takes a little bit to initialize, but the display output (which depends on the charge pump) is independent.

charred salmon
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I should honestly just refactor my IO initialization anyway. I'm being kinda stupid about it. Right now I deassert the chip, wait 1ms, and then reassert it so I can change the next setting I want. However the chip allows you to just write all 10 registers in sequence, so really I should just do that.
But it works for now, so I'm not too worried about it.

native pumice
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I’m having trouble with a Qt Py esp32-s3 with 4mb flash and 2mb psram. I can’t get it to load the very basic Neopixel blink sketch in the Arduino IDE . I get the error qt py:
xtensa-esp32s3-elf-g++. warning: {build.zigbee_mode}: linker input file unused because linking not done. I followed the instructions on the learn page for the board and got the Esp32 board files directly from GitHub.

stable forge
native pumice
stable forge
safe crown
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greetings all, fetching experts for a custom tool chain / core / platform settings forked from the SAMD51
I'm trying to have bossac uploading tool local to my toolchain / core
it's stored in Arduino15/packages/<package-name/hardware/samd/1.0.2/system/bossac/1.8.0-48-gb176eee/

Path that works => points to the samd arduino tool chain (that has to be installed to have it to work)
tools.bossac18.path={runtime.tools.bossac-1.8.0-48-gb176eee.path}

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I want to use my local toolchain storage of bossac and I tried

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tools.bossac18.path={build.system.path}/bossac/1.8.0-48-gb176eee/

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{build.system.path} correctly references the platform's /system subfolder where I have the c++ compiler (9-2019q4) and it's been working great when I used this path var for compiler.path

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however, when it comes to bossac, it's not finding it and not even evaluating the path var as such

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{build.system.path}/bossac/1.8.0-48-gb176eee//bossac.exe -i -d --port=COM7 -U -i --offset=0x4000 -e -w -v C:\Users\ME\AppData\Local\Temp\arduino_build_220275/Sketch.ino.bin -R
java.io.IOException: Cannot run program "{build.system.path}/bossac/1.8.0-48-gb176eee//bossac.exe": CreateProcess error=2, Le fichier spécifié est introuvable

north stream
#

You may need a $ as in ${build.system.path} depending on what command interpreter you're using

safe crown
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thank you @north stream testing now

safe crown
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Cannot run program "${build.system.path}/bossac/1.8.0-48-gb176eee//bossac.exe":

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same issue with $. Any hint ? (I just noticed the // and adjusting the the path now but I'm concerned about not having the { } path var interpreted as such (and taken as text instead)

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while it works when using the runtime path {runtime.tools.bossac-1.8.0-48-gb176eee.path}

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(same issue after fixing the // )

vivid rock
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It is not fully finished yet, but so far works for my test cases

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I'd appreciate any feedback

vivid rock
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But the way it works is that instead of having its own copy of tools (gcc, bossac,...) it refers tot he ones provided by adafruit. This is a perfectly legal and supported way of doing it - and saves me a lot of trouble (and bandwidth), as I do not have to install tools on my own.

safe crown
#

I should be able to refer to my platform's path for bossac and don't understand why it's not the case

slate pendant
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hey IDK if it's the best place to ask but I've been using VS Code with the Arduino Extension from Microsoft for a while and I wanted to check how I can best setup the IDE for development.
During my research I came across clangD and wanted to give it a try but I have the following errors and have no idea whats going wrong, despite the fact that the "code" compiles.

Unknown argument '-free'; did you mean '-fsee'?
Unknown argument: '-fipa-pta'
Unknown argument '-mlongcalls'; did you mean '-mlong-calls'?
Unknown argument: '-mtext-section-literals'
If you have any answers please ping me :)

image.png
fallow valve
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when I have the Spirit Halloween Life Sized Proton pack and when I crack open the borning Nuetrona Wand and add in a arudino mega (need it as I'll use as many leds to make a bargraph from)

can it have a hold from a push button like if I just press it will hold it in an amount of time if I use it on a adafruit sound board?

north stream
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There are various ways to achieve that sort of behavior. Which ones are appropriate depend a lot on what you're connecting it to

fallow valve
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well it's gonnabe a push button to be the venting sound for the sound fx mini 16mb version I'm replacing the original location of that "on/off" button as my venting button

north stream
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Should be straightforward enough

fallow valve
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hopefully once I have that thing I'm getting that mega (somehow) and work on the circuit from that Shield (if still being made) once I have it I'll figure something out

viral prawn
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Update: it works perfectly on the Adafruit Feather ESP32-S2. I don't want to use this, however. I didn't change any settings except selecting the board. Maybe it is just because I can't select OTG? Any ideas?

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Now that I look closer the one I was using says solo 2 on the chip and the one that works says mini 2

inland gorge
# viral prawn Update: it works perfectly on the Adafruit Feather ESP32-S2. I don't want to use...

no clue. From the datasheets comparing the two modules, they appear to have equal pin numbering pinouts for USB. And in the ESP universe, once you're on a specific class of chip ("S2", "S3", "C6", etc), compilation is the same. (https://www.espressif.com/sites/default/files/documentation/esp32-s2-solo-2_esp32-s2-solo-2u_datasheet_en.pdf https://www.espressif.com/sites/default/files/documentation/esp32-s2-mini-1_esp32-s2-mini-1u_datasheet_en.pdf )
The last thing I could think of perhaps is maybe you're running an old version of the ESP arduino board package? Current version is 2.0.14 https://github.com/espressif/arduino-esp32

viral prawn
#

This is what I've got

inland gorge
viral prawn
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It doesn't show in the list. Do I just dl and replace it in the filesystem?

inland gorge
# viral prawn It doesn't show in the list. Do I just dl and replace it in the filesystem?

Hmm that's weird. Normally you can choose newer versions from the version drop-down. Or go up to "Type:", pick "Updateable" and choose to update that way. How did you install the ESP32 board package? Did you install it using this step of adding the "package_esp32_index.json" to the Board Manager URLs in Settings? https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html Or some other method?

modern void
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I need Some help selecting the correct MicroController for a project that I am Undertaking

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My project is an Ethanol content analyzer and it is based on this project in the Youtube video:https://youtu.be/_JJjw7CJzf0?si=pXFA46deXi1idbjq

YouTube
turbokeychains
DiY Bluetooth Ethanol Content Analyzer + Fuel Temp Display

Build your own Bluetooth BLE Ethanol Content Analyzer for those who run E85 to prevent climate crisis global meltdown.

Parts can be found on ebay, Amazon, or AliExpress, however for the sake of convenience I've already gathered everything and made
available in one place in pre-programmed DiY & fully assembled variants:
https://www.turbokeychai...

▶ Play video
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The Board that is specified I cant really find, but I was looking at the Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz - STEMMA QT / Qwiic

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Basically, the primary Goal is to Convert the PWM signal (0-255) that is sent from the GM Ethanol Sensor, to my Haltech and Hondata ECU's in my Hot Rods. These require an analog 0-5v Analog signal. The Small screen is just a bonus, I will mount it on the dash as a performance gauge or something, its cool. In the project linked above everything is pretty much sorted out, to include the code. The Primary focus is to send the Analog

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My main issue is with Product selection, Would the Metro Mini 328 be a compatible Controller for my project Purposes?

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Is there a better Microcontroller offered by Adafruit to suit my needs?

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Im a n00b to to the "Stem/Maker" circles, but have experience in many fields that have confluence. This is my first IC/Microcontroller project and would appreciate any assistance with proper selection of the correct controller. Barring that, I will resort to what I know and just order a handful of various ATMega 328 Controller boards and use the process of elimination, would like to avoid taht

worldly oracle
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hi,
i need an help
when i use the l293d motor driver shield with the ultrasonic sensor the speed of the motor decreases
if i delete the code of the ultrasonic sensor the motor run at full speed

leaden walrus
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can you share complete code listing?

gilded swift
#

And also your hardware setup too

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The motor speed decreasing when running the ultrasonic sensor leads me to think your power supply isn’t strong enough to do both

vivid rock
# modern void https://www.adafruit.com/product/2590

Metro Mini 328 doesn't have Bluetooth, so the parts of that project that require BLE (e.g. mobile app) wouldn't work with it. (BLE stands for Bluetooth Low Energy)
I do not think there are any MCUs left that use 5v logic and also have BLE.

modern void
vivid rock
#

It would be much easier to work with 3.3v logic - almost all boards nowadays use 3.3v. Adafruit has just a couple of 5v boards.

Does the output have to be 0-5v scale?

leaden walrus
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oops. interleaving convo's. sry. @worldly oracle can you share complete code listing?

leaden walrus
#

@modern void that project has some confusing aspects. it's not clear how bluetooth is actually being used. the arduino code only has some serial prints (to a BLE module?). it's also not clear what the PWM and DAC outputs are used for? the inputs are also confusing. looks like there's a PWM input as well as an analog input?

#

but in general, it looks like the general idea is: (a) read a sensor output and (b) display it somehow? or is there more to it?

modern void
leaden walrus
modern void
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@leaden walrus Im a little confused as well, like why does the Nano need the Resistor in the video?

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However I will say this. The GM ethanol sensor I do know quite well

leaden walrus
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the pull up is probably due to the nature of the output from the sensor

modern void
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It operates on 8.6v-16V, and has a PWM signal output. GM is the ONLY manufacturer that uses PWM input on the Vehicle ECU. All others use an Analog sensor

leaden walrus
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are there good docs available on the GM ethanol sensor? that give tech details about its output, etc?

odd heron
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i uploaded a code into my EPS32 S3 and was successful. When i open the serial plotter, i am getting the following error

23:42:28.931 -> ESP-ROM:esp32s3-20210327
23:42:28.931 -> Build:Mar 27 2021
23:42:28.931 -> rst:0x1 (POWERON),boot:0x2b (SPI_FAST_FLASH_BOOT)
23:42:28.931 -> SPIWP:0xee
23:42:28.931 -> mode:DIO, clock div:1
23:42:28.931 -> load:0x3fce3808,len:0x44c
23:42:28.931 -> load:0x403c9700,len:0xbd8
23:42:28.931 -> load:0x403cc700,len:0x2a80
23:42:28.931 -> entry 0x403c98d0
23:42:29.152 -> E (260) opi psram: PSRAM ID read error: 0x00000000, PSRAM chip not found or not supported, or wrong PSRAM line mode
23:42:29.152 -> E (265) spiram: SPI RAM enabled but initialization failed. Bailing out.

Can anyone help me what the error is and how to resolve it

modern void
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So in order to be able to make sweet turbo noises with E85 and Tuning, Need the signal to be readable by other ECU's

modern void
leaden walrus
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@odd heron what specific ESP32 S3 board are you using? (link to product page)

odd heron
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Waveshare

leaden walrus
odd heron
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eps32-s3-box

stable forge
# odd heron eps32-s3-box

those boards are not compatible. the waveshare board has 2MB of quad PSRAM; the S3 BOX has 16MB of octal PSRAM.

#

you need to choose the board that you have. If it's not in the list, you need to find a close one that has the same specs

odd heron
leaden walrus
stable forge
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thanks @cater; waveshare chooses a generic board def

leaden walrus
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@stable forge thanks for finding wiki. much better docs. i was rooting thru BSP stuff 🙂

stable forge
#

i was hoping they had some support info

north stream
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It's not hard to turn an PWM signal into an analog signal

modern void
leaden walrus
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interesting. uses both frequency and pulsewidth to encoded two different parameters.

image.png
modern void
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@leaden walrus Heres a better spec sheet

leaden walrus
modern void
#

@leaden walrus The link here under the specifications tab

modern void
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I need to send the ethanol Content detected by the sensor to my Car's ECU

leaden walrus
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oh, ok, that would be the output side of things (car's ECU)

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is that what the DAC output is used for?

# 
// raw signal reading
unsigned long highTime = pulseIn(SENSOR_PIN, HIGH);
unsigned long lowTime = pulseIn(SENSOR_PIN, LOW);

// computed value
unsigned long pulsetime = highTime + lowTime;  


// ETHANOL CONTENT
long eContent = int((1000000 / pulsetime) - eContentSkew);

// FUEL TEMPERATURE  
float frequency = float(1000000 / pulsetime);
float dutyCycle = 100 * (highTime / float(lowTime + highTime));
float totalTime = float(1.0 / frequency);
float period = float(100 - dutyCycle) * totalTime;
int temperature = 40.25 * 10 * period - 81.25;
int temperatureF = temperature * 1.8 + 32;
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in terms of reading the GM ethanol sensor, that's all the magic there

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@modern void do you have info on what's needed for the output? what does the car's ECU input need?

modern void
modern void
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@leaden walrus This is my first STEM related project I am taking on myself, I appreciate the help. Closest thing I have done to this is Build 3 Voron 3d Printers

leaden walrus
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the sensor output is a 12V PWM signal with frequency between 50 and 150 Hz and duty cycle (pulse width) between 1ms and 5ms.

modern void
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@leaden walrus With the code I provided, and the description of the project, what ADAFruit controller would you recommend? It will be protected in a 3d Printed Carbon Fiber Nylon Enclosure and all wiring is going to be Tefzel w/ Rachem Heatshrink

leaden walrus
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it doesn't sound like bluetooth is actually needed?

modern void
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I would like the ability to use the app that this dude developed, just to check, but thats not a deal breaker

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The most important aspect is sending a good signal to the Car ECU

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I will sacrifice Bluetooth if it means purchasing a quality Adafruit product

leaden walrus
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it's tough to give a single recommendation. i'd expect getting this all working to be a bit of an adventure and learning experience. and different boards would help at different points.

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how much do you have in the way of test equipment? like multimeters, scopes, etc?

modern void
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ALL of it

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I install a lot of StandAlone engine management systems for High performance Cars, so I have a full range of gear

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would this one work, just no BT and no app?

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I like the form factory and the IO on this board

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Based on the code does it HAVE to be an ATMega 328? or just Arduino IDE compatible?

leaden walrus
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there is at least one AVR specific line of code in their sketch:

    TCCR1B = TCCR1B & 0b11111000 | 0x01;
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the ATMega 328 is AVR

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that's the original chip used by arduino

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on the board called the UNO

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it would work. and might be a good starting point.

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i'd be inclined to start fresh with the code though

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like make a sketch that reads the GM sensor and prints values to the arduino serial monitor

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(most of the code needed i posted above)

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but also - there are more "powerful" chip options than the 328

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for just reading that GM sensor, doing some math, and then maybe outputting a simple DAC signal - the 328 should be fine

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but i'd be open to the idea that you might want to switch to a different board as you proceed and learn more and the project evolves, etc.

modern void
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I would be interested in the More powerful options, as the Data being fed to the car's ECU needs to be as low latency as possible

leaden walrus
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tbh - you might find the 328 to be perfectly fine

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the more powerful options will all end up being 3.3v logic

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you're dealing with 12v levels, so even with 5v logic, will need to possibly deal with level shifting

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i'm guessing there will be 12v power generally available for the setup?

north stream
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Arduino does offer one oddball 5V high performance board

odd heron
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I am using BLE in EPS32 s3 and this is the my code this code is written in a seperate cpp file. In the main sketch inside the setup() function i am calling the ble_loop() function.
When compiling i am getting the following error

\ble_adv.cpp: In function 'void ble_tx()':
\ble_adv.cpp:88:3: error: 'pCharacteristic_tx' was not declared in this scope
pCharacteristic_tx->setValue(&txValue, 1);
^~~~~~~~~~~~~~~~~~
\ble_adv.cpp:88:3: note: suggested alternative: 'pCharacteristic'
pCharacteristic_tx->setValue(&txValue, 1);
^~~~~~~~~~~~~~~~~~

i am stuck on increasing the visibility of the variable pCharacteristic_tx

leaden walrus
#

could maybe move this to global scope

  // Create the BLE Characteristic for transmitting data (TX)
  BLECharacteristic* pCharacteristic_tx= pService->createCharacteristic(
      CHARACTERISTIC_UUID_TX,
      BLECharacteristic::PROPERTY_NOTIFY
  );
modern void
#

So 12-16V DC

fallow valve
#

are they're a compatible atmega chip through hole of the Arudino Mega's chip that the boot loader can be loaded to?

fallow valve
#

or find a led multiplex chip to control a 20 led bargraph since I only have an uno

fallow valve
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how to make the six analog pins to become digital ones? what's the code on the uno one can do that

safe shell
#

typically any pin that can do analog can also do digital

odd heron
# stable forge i was hoping they had _some_ support info

I changed the board to ESP32S3 Dev which was mentioned in Waveshare site https://www.waveshare.com/wiki/ESP32-S3-Pico#Arduino . When i uplaod my sktech, i am getting the following error

16:00:56.033 -> ESP-ROM:esp32s3-20210327
16:00:56.033 -> Build:Mar 27 2021
16:00:56.033 -> rst:0x1 (POWERON),boot:0x2b (SPI_FAST_FLASH_BOOT)
16:00:56.033 -> SPIWP:0xee
16:00:56.033 -> mode:DIO, clock div:1
16:00:56.033 -> load:0x3fce3808,len:0x44c
16:00:56.033 -> load:0x403c9700,len:0xbd8
16:00:56.033 -> load:0x403cc700,len:0x2a80
16:00:56.033 -> entry 0x403c98d0
16:00:56.286 -> Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.
16:00:56.343 ->
16:00:56.343 -> Core 0 register dump:
16:00:56.343 -> PC : 0x42009135 PS : 0x00060330 A0 : 0x820076d8 A1 : 0x3fceb1e0
16:00:56.343 -> A2 : 0x00000094 A3 : 0x3fceb234 A4 : 0x00000094 A5 : 0x0000002d
16:00:56.343 -> A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x82007680 A9 : 0x3fceb1b0
16:00:56.343 -> A10 : 0x3fceb23c A11 : 0x3c111754 A12 : 0x3c111761 A13 : 0x0000ff00
16:00:56.377 -> A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x00000018 EXCCAUSE: 0x0000001c
16:00:56.377 -> EXCVADDR: 0x000000d0 LBEG : 0x40056f5c LEND : 0x40056f72 LCOUNT : 0xffffffff
16:00:56.377 ->
16:00:56.377 ->
16:00:56.377 -> Backtrace: 0x42009132:0x3fceb1e0 0x420076d5:0x3fceb200 0x42007877:0x3fceb270 0x420035d8:0x3fceb2d0 0x42019762:0x3fceb2f0 0x40376c1b:0x3fceb320 0x403cd83b:0x3fceb350 0x403cdafa:0x3fceb380 0x403c9925:0x3fceb4b0 0x40045c01:0x3fceb570 |<-CORRUPTED
16:00:56.408 ->
16:00:56.408 ->
16:00:56.408 ->
16:00:56.408 ->
16:00:56.408 -> ELF file SHA256: 844b6d425251bba4
16:00:56.408 ->
16:00:56.408 -> E (382) esp_core_dump_flash: Core dump flash config is corrupted! CRC=0x7bd5c66f instead of 0x0
16:00:56.408 -> Rebooting...
16:00:56.408 -> ESP-ROM:esp32s3-20210327

Note-I had erased my flash before uploading

ESP32-S3-Pico
stark kindle
# odd heron I changed the board to ESP32S3 Dev which was mentioned in Waveshare site https:/...

That would mean that your program successfully loaded and that something bad happened with the stack (like a buffer overflowing) or a pointer while it was running. So it got past where it was having trouble before (mismatch on the amount and type of memory), which is progress 🙂

You can use the ESP Exception Decoder with that backtrace to pinpoint where the program was when it crashed. The repository has instructions on how to use it.

GitHub
GitHub - me-no-dev/EspExceptionDecoder: Exception Stack Trace Decod...

Exception Stack Trace Decoder for ESP8266 and ESP32 - GitHub - me-no-dev/EspExceptionDecoder: Exception Stack Trace Decoder for ESP8266 and ESP32

leaden walrus
#

@modern void was asking about 12V power for considering what general power requirements are needed (like ability to battery power the setup, etc.). ping me if you are still around and want to continue talking about options. unfortunately, it probably won't be as simple as a single obvious "best" option.

native dagger
#

Having an issue with my qtpy 2040 where when I flash arduino code to it, suddenly windows doesn't recognize the board

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I can get circuitpython on there, but if I try to run any arduino code, I can't access the serial port and device manager has this error, and no COM ports open

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what might cause this?

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The only port available when I do the double press on the qtpy is "uf2 board"

stable forge
native dagger
# stable forge if you flash something simple, like blink, does it work? Your program might be c...

Here's my code. I'll try to find blink and flash it.

#include <DFRobotDFPlayerMini.h>
#include <Adafruit_NeoPixel.h>

DFRobotDFPlayerMini myDFPlayer;
Adafruit_NeoPixel pixels(1, PIN_NEOPIXEL);
void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);
  if(!Serial)
  {
    delay(2);
  }
  pixels.begin();
  pixels.setPixelColor(0, pixels.Color(255, 0, 0));
  pixels.show();
  
  
  myDFPlayer.volume(30); 
  Serial.println(myDFPlayer.readVolume());
  myDFPlayer.enableLoopAll();
  myDFPlayer.play(1);
}

void loop() {
  // put your main code here, to run repeatedly:

}
#

Blink produces No monitor available for the port protocol uf2conv. Could not connect to UF2_Board uf2conv port. error

stable forge
#

are you using the philhower arduino core?

native dagger
#

Will do. And yes I sm

stable forge
#

what version of Arduino IDE?

digital rose
#

Funny enough I came here to ask the same question 😅 Trying to run the sample code for the RP2040 RFM95 Feather and running into the same problem. It does seem like an issue the code is causing because other code doesn't cause the same behavior. Not sure how to debug though, especially since I'm using sample code that you'd expect to work.

native dagger
native dagger
#

I restarted my PC, still getting the same error. With blink and with my code above

#

I'm getting this error when I use the two button method to get the UF2 thing to mount.
Sketch uses 54532 bytes (0%) of program storage space. Maximum is 8384512 bytes.
Global variables use 10288 bytes (3%) of dynamic memory, leaving 251856 bytes for local variables. Maximum is 262144 bytes.
Converting to uf2, output size: 144896, start address: 0x2000
Scanning for RP2040 devices
Flashing D: (RPI-RP2)
Wrote 144896 bytes to D:/NEW.UF2

No monitor available for the port protocol uf2conv. Could not connect to UF2_Board uf2conv port.

stray sierra
#

Hello, I am trying to port a code that uses u8g8 library for I2C OLED screen to a SPI RGB screen

#

I want to display XBMP that I already have

#

I tried drawGrayscaleBitmap, but it does not display it properly...

#

can anyone help?

#

how to display XBMP on RGB display?

edgy ibex
# native dagger I restarted my PC, still getting the same error. With blink and with my code abo...

Sounds like Arduino is able to upload. Because "reasons" UF2 devices like to show as a disk drive for uploading, rather than a COM port. And then Arduino makes it difficult, if not impossible, to select a monitor COM port that doesn't actually exist. (+)

  1. Does the blink sketch actually cause the LED to blink? That's your first check, to make sure that the sketch is running.
  2. Assuming 1. is OK, if you add Serial.begin(115200); at the top of setup() check and see what Windows device manager shows. Specifically open the "Ports (COM & LPT)" section and see what appears there. It will sometimes take a few seconds (I've seen up to 10) for Windows to recognise the new com port coming on line, but it'll eventually show.
native dagger
edgy ibex
#

OK. It looks like it's uploading. Never mind checking 1 is OK, what do you see in device manager if you add the Serial.begin(115200); line to setup()? Stay with blink. just add the one line.

#

Also, I have a memory tickling the back of my mind that with some UF2 boards, I've had to explicitly reset them after an upload. After uploading blink, what happens if you power cycle the board?

somber siren
#

I'm using the lsm6ds33 on a feather nrf52840 sense. Everything is working as expected except that it seems insensitive to slow rotations. I have not enabled the high pass filter and the datasheet indicates it is disabled by default. (As far as I can tell the ctrl7 register is never even touched by Adafruit_LSM6DS33.h.)

With the 125dps data range I cannot detect rotations of 1dps even when I'd expect a raw int16_t value of around 228 = 1000mdps / (4.75mdps / LSB). Moreover I expect to see noise jitter when the board is at rest but I just see zero.

Is this a basic limitation of these sensors? Is there another noise suppression mechanism I could try disabling?

soft pollen
#

Hello! Is anyone able to help me with an issue that I am having with a Bluefruit nRF52832 board? I keep getting an assertion issue printed into the serial monitor when I pair it with my phone via bluetooth.

elfin hare
#

What is it?

soft pollen
#

Hold on, discord is telling me that something in my message is blocked by the server moderators, but I'm not sure what, one second

#

Hmm, I am basically just copying and pasting what it printed into the serial monitor, but it says it contains a word that goes against code of conduct

#

"assertion "pcache->block == 0xffffffff" failed:

#

Thats the first part

#

Then it just lists the files location on my computer, and it is line 183 in the lfs.c file for LittleFS

#

lfs_cache_prog is the actual line

elfin hare
#

Can you take a screen shot and post it?

soft pollen
#

Sure

vivid rock
#

They have a very strict content moderation bot.
Much stricter than my grandmother used to be when I was a kid.
So it is quite possible to trigger it unitnetionally

#

maybe it was six * ?

soft pollen
#

I added that into the screenshot just cause that had my name there. the original message, I just deleted it, so I'm not sure

#

Six * turns into two italicized *

idle gust
#

Any idea if a tiny uf2 bootloader will be avaible for arduino nano esp32? Since its based on the esp32 s3 , it should technically work

stable forge
native dagger
#

Above is my code I'm trying to get working, having "solved" the issue I was having with my arduino IDE

📎 message.txt
#

I can't find "Com Error 6" anywhere in the github for the library. However, there don't seem to be CPP files there? How can that be?

north stream
#

I thought the Arduino IDE was in Java. However, some of the utilities like the compilers, avrdude, etc. may be implemented in other languages.

native dagger
north stream
#

That is weird, I haven't looked

native dagger
#

It's disappointing because the default library is crashing my 2040 but this Alt lib is badly documented

vivid rock
# 
    DfMp3_Error_Busy = 1,         //  busy                  busy
    DfMp3_Error_Sleeping,         //  frame not received    sleep
    DfMp3_Error_SerialWrongStack, //  verification error    frame not received
    DfMp3_Error_CheckSumNotMatch, //                        checksum
    DfMp3_Error_FileIndexOut,     //  folder out of scope   track out of scope
    DfMp3_Error_FileMismatch,
#

seems error 6 is "Error_FileMismatch"

native dagger
#

Hmm ok

#

Thx

vivid rock
#

alternative meanings: " folder not found | track not found"

native dagger
#

I'll have to check the SD card

native dagger
umbral pawn
#

Hi, I'm having an issue getting the arduino ide to recognize the adafruit feather M0 LoRa I'm using. I followed the instructions outlined here: https://learn.adafruit.com/adafruit-feather-m0-radio-with-lora-radio-module/setup and here: https://learn.adafruit.com/adafruit-feather-m0-radio-with-lora-radio-module/using-with-arduino-ide and my ide still wont recognize the device in any of the port. Im using a proper data cable and I've tried doing this with 5 different computers but to no avail. Does anyone know what issue is casuing this?

Adafruit Learning System
Adafruit Feather M0 Radio with LoRa Radio Module

Send your message really really far and wide

Adafruit Learning System
Adafruit Feather M0 Radio with LoRa Radio Module

Send your message really really far and wide

trail plaza
#

anyone ever messed with this Canduino thing?
i dig it for being an arduino nano with the correct canbus controller all on the same board, super compact (which for an automotive project, is a good thing)
https://www.tindie.com/products/massivegroup/canduino-v31-atmega328p-with-can-bus/

Tindie
CANduino v3.1 - ATmega328P with CAN-bus by MassiveButDynamic on Tindie

We sell an Arduino Nano which has an integrated CAN-bus and USB-C. It is a bit wider but the pin order is the same as on the Arduino Nano.

#

im worried it'll have some goofy proprietary drivers or quirks like that

inner seal
#

Hi I'm recreating following projekt

https://learn.adafruit.com/generating-text-with-chatgpt-pico-w-circuitpython?view=all#code-walkthrough

However I want to add a speech to text, where you can say your own prompts. Also i want it to be able to use a text to speech function to read it out loud. I'm thinking of using a “Adafruit RP2040 Prop-Maker Feather” to connect it with a speaker. However I am having trouble figuring out the microphone part as I am having trouble finding the right components.

Do anyone have recommendations on microphone components that can record audio and is compatible with Adafruit RP2040 Prop-Maker Feather and Raspberry Pi Pico W?

Adafruit Learning System
Generating Text with ChatGPT, Pico W & CircuitPython

Push Button, Get Superpower

grave mortar
#

I'm struggling so much with 1.8v i2c is there any arduino compatible boards that support this natively?

vivid rock
grave mortar
# vivid rock never seen one like this. you tried level shifters, right? they don't work?

I did the main issue I had there is that for the life of me I can't get the pico to drive a 1.8v supply nor is it accesible on the other device. Like I tried voltage dividers on the 3.3v and the 5v suppy and for some reason they simply don't work. I think I may just need to copy an actual circuit but can't find any examples where the arduino drives the 1.8v

vivid rock
#

I did a circuit like that.
for power, I just used a 1.8 LDO which was powered by 3.3v line.
for I2C, level shifters, let me find which one

grave mortar
#

gotcha, kk I'll see if I can source an LDO or buy one locally

vivid rock
#

(corrected previous post)

grave mortar
vivid rock
grave mortar
#

Nice i do have one of those I'll try that too, thanks!

river yacht
#

I don't understand why, but for some reason the tft is getting a blue background, even though the background is supposed to be set to black? It works, but when one of my classes that is supposed to use the gfx, instantiates it draws the test rectange from the class and turns the back ground blue. What should I be looking for?

river yacht
#

If I hold the Boot0 button, the blue background turns back to black, and everything else still seems to function fine. Long term that isn't a suitable option mind you

inner seal
#

Hi, I'm looking for a microphone that can record audio on adafrut.com. However, I'm having a hard time figuring out with recorded audio and with measuring the noise level.

https://www.adafruit.com/search?q=microphone

Can someone clarify which ones can record audio?

Search Results for 'microphone' on Adafruit Industries

Adafruit Industries, Unique & fun DIY electronics and kits : Search Results - Tools Gift Certificates Arduino Cables Sensors LEDs Books Breakout Boards Power EL Wire/Tape/Panel Components & Parts LCDs & Displays Wearables Prototyping Raspberry Pi Wireless Young Engineers 3D printing NeoPixels Kits & Projects Robotics & CNC Accessories Cosplay/Co...

north stream
inner seal
vivid rock
#

depends on what you plan to do with that audio.
If you want to listen to it, or process and use in some soundtracks, the easiest way would be connecting a microphone to a laptop - there are plenty of wired and wireless microphones that can be connected to a computer.
Or you coudl use one of dedicated sound recorders such as TASCAM or ZOOM.

inner seal
vivid rock
inner seal
#

Thanks

inner seal
north stream
# inner seal Do anyone now if you can use circutpython with this? https://learn.adafruit.com...

The Raspberry Pi supports Python directly, so you don't really need CircuitPython. However, some of the CircuitPython libraries to talk to various devices are available as Blinka. https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi

Adafruit Learning System
CircuitPython Libraries on Linux and Raspberry Pi

Make hardware and interface with sensors super easy using CircuitPython libraries

inner seal
#

Ok thanks, I was looking on other project which used CircuitPython so I was wondering. However i have found other exampels that are beter. Anyway @north stream and @vivid rock thanks for all the help, it was really needed.

wooden lion
#

Hi! New to the discord! Can I ask questions here on the hardware / software side? I’ve got a lolin d1 mini and lolin ssd1680 250x122 epaper board, and I’m at wits end as I can’t get the epaper display to do literally anything. I swapped for a new d1, tried a wave share epaper module, different pinouts etc, and I can’t for the life of me get the displays to do anything. LMK if I’m in the wrong place for help!

north stream
silent spruce
#

Has anyone used the BNO055 breakoutboard? I am currently reading out their system calibration variables and I get a 0 80% of the time

rain kindle
#

hi! good afternoon and wonder friday to you all!

I was digging through my parts box and found a Wemos D1 R32 (Arduino Uno clone with ESP32), a Velleman VMA207, 4x Adafruit 5v-6v Peristaltic pumps and a Adafruit 5v 10A switching power supply

Links to Products:
D1 R32 "Arduino Uno" : https://www.instructables.com/How-to-Set-Up-WeMos-TTgo-ESP32-Uno-D1-R32/ -> sorry, wish I had the datasheet, this is what I got from the shop i bought it from
purchased from here: https://www.electrokit.com/en/product/utvecklingskort-esp32-uno/
Vellman VMA207: https://www.velleman.eu/products/view/?id=439178
purchased from here: https://www.kjell.com/se/produkter/el-verktyg/elektronik/utvecklingskit/arduino/shields/motor-shield-for-arduino-p87198
Peristaltic Pumps: https://www.adafruit.com/product/3910
Power Supply: https://www.adafruit.com/product/658

Now I believe, the VMA207 is a clone of Adafruit's MotorShield (V1) based on the L293D in which case it's covered in this Learn guide : https://learn.adafruit.com/adafruit-motor-shield

#

I am planning on building (for the kids for christmas) a (alcohol free!) cocktail bot. And thought I had everything dialed, until I read the docs and had a few questions, that I am hoping someone with a second set of eyes can help me resolve

muted gyro
#

I recommend to just ask the questions 😄

rain kindle
#

he he! got interrupted by said kids in the middle of writing! 😄

#

Power:

As per the Adafruit product site, the peristaltic pumps will pull up to 500mA; x4 = 2A - this is within spec for the MotorShield, from the Vellman page (which again, looks to be cut+paste from Adafruit): 0.6 A per bridge (1.2 A peak). The Arduino Uno ESP32 Clone (according to https://makershop.ie/wemos-r32 - again, haven't found the proper datasheet) says it's working voltage is 3V3; but it has DC Input Voltage of 5V -> 12V DC and will draw max 250mA. Thus with all motors, the D1 R32 and some head room we are < 3A; well within the spec of the 10A power supply. But clearly I will need to run the system from something other than USB... hence the 10A power supply.

Reading the Motor Shield Learn guide, particularly the page on Power Requirements: https://learn.adafruit.com/adafruit-motor-shield/power-requirements - the advice is to run the Arduino and Pumps from seperate power supplies to reduce the noise from the motors impacting the the digital Arduino side. Thus in use, I think the best plan is to split the Power Supply

#

so! the question is how to configure the MotorShield - i was slightly confused by the documentation

north stream
rain kindle
# north stream That splitter doesn't provide separate (as in independent, which is what you wan...

japp, so reading the documentation

so! the question is how to configure the MotorShield

in one case
If you would like to have 2 seperate DC power supplies for the Arduino and motors. Plug in the supply for the Arduino into the DC jack, and connect the motor supply to the PWR_EXT block. Make sure the jumper is removed from the motor shield.
If you have a Diecimila Arduino, set the Arduino jumper to EXT. This is a suggested method of powering your motor project

remove this jumper - power the Arduino by the DC jack, then break out the other DC jack to wires to the EXT_PWR header -> that should do the trick for normal use

image.png
#

then, for debugging - I can power the Arduino by USB and use the USB Serial interface with no issue, right?
If you would like to have the Arduino powered off of USB and the motors powered off of a DC power supply, plug in the USB cable. Then connect the motor supply to the PWR_EXT block on the shield. Do not place the jumper on the shield. This is a suggested method of powering your motor project
(If you have a Diecimila Arduino, don't forget to set the Arduino power jumper to USB. If you have a Diecimila, you can alternately do the following: plug the DC power supply into the Arduino, and place the jumper on the motor shield.)

My concern here is that I am basing this on the equivalence of the R1 D32 and an Arduino UNO - and without the docs for the R1 D32 I think i am right!

#

and as is the case, in explaining to someone else, you end up answering your own questions! I was originally thinking about powering everything from one supply - either powering the motor shield, and the arduino taking power from the shield (though I think this might be a bad idea - the arduino will take 5v, despite being 3v3 core logic)... but powering by the header pins might be dangerous here.... also I am not sure if the arduino will like giving me a serial port over USB when powered by the headers/motor shield

powering everything by the DC jack - the docs talk about the arduino inteligently switching between USB and DC power - but the DC Power has to be a diode drop or so higher than VUSB - and that wont be the case with a 5V DC supply, so that's out of the picture too... and it seems that the max you can power an arduino with is 2A by the DC Jack, which won't be enough for 4x pumps.. and on top of that - if you power by the DC Jack, does it keep the USB Serial Port available? (and again, this assumes the Uno and the D1 R32 behave the same... which I wouldn't want to guarantee)

(I know I can "just try" but right now im not in the mood to fry an arduino. my one motorshield of my macbook! for the sake of asking a stupid question)..

but then, unless someone can point out an error - I will power the Arduino from the DC Jack in normal usage (to simplify wiring), and via the USB for development - the MotorShield will be powered by the EXT_PWR with the PWR Jumper removed

#

the way this is written : "If you would like to have the Arduino powered off of USB and the motors powered off of a DC power supply, plug in the USB cable. Then connect the motor supply to the PWR_EXT block on the shield. Do not place the jumper on the shield. This is a suggested method of powering your motor project" implies that the order is important... though that shouldn't be the case right? as the schematic says the PWR Header (JP1) will completely disconnect the shield power from the arduino... so you can have the USB plugged in and MotorShield powered at the same time

adafruit_products_mshielddiag.png
#

sorry for taking time! turned out i just needed to rubber ducky! (maybe Discord should implement a Rubber Ducky bot, to just listen to you explain your problem! :D)

final yacht
#

Hello all, struggling a bit with multiple definitions of interrupt vectors when I include the Adafruit_VS1053 library and the interrupt
library https://github.com/GreyGnome/EnableInterrupt which I'm using for decoding the output of a hobby RC receiver. I assume that both libraries are assigning interrupt vectors, I've been poking through both libraries and I can't quite see where the conflict is. When I include both the VS1053 library and the EnableInterrupts library I get the following error repeated 8 times:
WInterrupts.c.o (symbol from plugin): In function 'attachInterrupt':
(.text+0x0): multiple definition of __vector_1'
sketch/faceMotorsSensorsSoundHobbyRC.ino.cpp.o (symbol from plugin):(.text+0x0): first defined here
I get 8 of these, one for each interrupt vector.
Any suggestions as to how I can use both of these libraries?
Edit: Since I'm on a Mega I have plenty of hardware interrupts so I don't need this right now, but I'd be curious to know how to solve this anyway

inner seal
#

Hi, does anyone know if you can use a “Raspberry Pi Pico W” with a “Adafruit Voice Bonnet for Raspberry Pi”?

https://www.adafruit.com/product/5526
https://www.adafruit.com/product/4757

Or do I need a different raspberry pi to be the middleman?

Raspberry Pi Pico W

The Raspberry Pi foundation changed single-board computing when they released the Raspberry Pi computer, now they're ready to do the same for microcontrollers with the release of the ...

Adafruit Voice Bonnet for Raspberry Pi -Two Speakers + Two Mics

Your Raspberry Pi computer is like an electronic brain - and with the Adafruit Voice Bonnet you can give it a mouth and ears as well! Featuring two microphones and two 1 Watt speaker outputs ...

north stream
north stream
final yacht
#

Thanks @north stream I'll follow up on that at some point

inner seal
# north stream The Pi and Pico are two very different boards. The Pi is an entire computer wit...

Ok thanks, in that case i probably need a raspberry pi to be a middleman to be able to both use the Adafruit Voice Bonnet and a Raspberry Pi Pico W. Do you have any recommendations on what Pi I should use? In the exampel i'm looking at they use a “Raspberry Pi 4 Model B - 2 GB RAM”

https://learn.adafruit.com/using-google-assistant-on-the-braincraft-hat?view=all

However I don't know if you can connect it with a Raspberry Pi Pico W to be able to access the internet?

Adafruit Learning System
Using Google Assistant on the BrainCraft HAT or Voice Bonnet

This project makes use of the BrainCraft HAT to easily get Google Assistant up and running

vivid rock
#

the only thing I am not sure about is whether it is compatible with the BrainCraft hat

inner seal
muted gyro
#

I think that bonnet might actually theoretically work with a pi pico. Looks like it's just I2S for audio + I2C for configuration. Both are supported by the Pi Pico. I2S depends on what exact I2S format it is. And if you're using circuitpython or Arduino. I think theoretically the RP2040 can do any I2S format, in the worst case you just have to write the entire thing yourself and in the best case there's already a library for it. And for the I2C configuration there is probably no library. Might be a fun challenge.

stable forge
# inner seal huh neat, it seams I need to learn how to read beter. Anyway thanks for the help...

Voice Bonnet will work with Zero 2 W. From the guide:

Your Raspberry Pi computer is like an electronic brain - and with the Adafruit Voice Bonnet you can give it a mouth and ears as well! Featuring two microphones and two 1 Watt speaker outputs using a high quality I2S codec, this Pi add-on will work with any Raspberry Pi with a 2x20 connector - from the Pi Zero up to the Pi 4 and beyond (basically all but the very first ones made).

lusty vault
rose echo
#

I'm having a lot of trouble getting my 128x64 SH1107 OLED to work with a Seeeduino Xiao SAMD21. I'm working on a DIY filament pen and this is the code but I've also tried the basic example code and it's also not worked:

📎 message.txt
#

If anyone could point me in the right direction I'd be appreciative; I've always had trouble getting these screens to work with arduino code and only managed to with a feather s2 running python.

vivid rock
rose echo
#

my encoder, stepper, feed button, and thermostatic block heating are all working with my code but nothing at all displays on the screen. I've checked connections multiple times and everything seems correct - only caveat is I don't have the RST wired but i don't really want or need it by my understanding.

vivid rock
#

two obvious questions:

  • is it definitely SH1107?
    there are many similar displays, e.g. SSD1306
  • is the I2C address correct?
  • do you have pullups on SDA and SCL?
    can you do I2C scan and see if the address 0x3C shows up?
rose echo
#
  • it is definitely SH1107
  • the address is correct: it is written on the back of the board
  • I don't think I do have pullups on them, can you help me there?
  • i don't know how to do a scan, can you help me with that as well?
vivid rock
#

anything from 1.8k to 10k should work.
I normally use 3.3k

rose echo
#

I'm finding the OLED with the pullups on the pins but I still can't draw anything

22:38:53.813 -> Scanning...
22:38:53.857 -> I2C device found at address 0x3C !
22:38:53.857 -> done

river yacht
#

Are there any tutorials on how to put bitmaps onto the external memory of the qualia esp32-s3 rgb666?

river yacht
#

I'm trying to put a 300ish kb image onto it for display, but it says it's overflowing the memory

odd heron
#

Hi need a help in ESP32 s3 RTC
This is my code to get the rtc and i am printing the local_time correclty. But when i access RTC inside a new tab/cpp file to print the time i am getting a different time.
rtc_esp32.cpp file
#include <Arduino.h>
#include<time.h>
#include<WiFi.h>
#include "global.h"
#include<ESP32Time.h>
#include "rtc_esp32.h"

const char* ntp_server="pool.ntp.org";
ESP32Time rtc;

void print_local_time()
{
Serial.println("inside print");
while (1){
Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S"));
delay(1000);
}
}

void get_rtc_time()
{
Serial.println("inside Rtc function");
if(WiFi.status()==WL_CONNECTED){
Serial.println("Setting up RTC");
configTime(RAW_OFFSET, DST_OFFSET, ntp_server);
struct tm timeinfo;
if(getLocalTime(&timeinfo)){
rtc.setTimeStruct(timeinfo);
}
//print_local_time();
}
else{
Serial.println("WiFi is not connected");
}
}

Second file disp_time.cpp

#include <ESP32Time.h>
ESP32Time rtc;
while(1)
{
Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S"));
delay(1000);
}
in the above print i am getting 1921s time.

north stream
north stream
odd heron
#

So my concern is that if i am setting the RTC correctly.

vivid rock
rose echo
rain kindle
#

hey all - if anyone has used the D1 R32 - can you comment on compatibility? according to the limited info out there its hardware compatible with the Uno

I just put my stack together with a clone of the Adafruit V1 Motor Shield and noticed the top two pins on each header don't get used by the shield. According to the adafruit docs, the shield is compatible with Uno and looking at the pinouts, i think it's all ok - it would appear the R1 D32 has a 5V and GPIO pin, and SCL/SDA that are not used - apart from the signal names, the power/grounds line up

image.png image.png image.png
#

however comparing to the Uno pin out - the R1 D32 has a reset pin and the Uno has AREF (3rd pin from top on the right);
the Uno on the left header, has IOREF vs the R1 D32's 5v (I guess that matches), then the R1 on the top left has an I/O, and the Uno is unlabelled

I plugged it all into a USB supply and it didn't release the magic smoke and the shields PWR LED lit up, so seems ok

1-3.png
shy oasis
# odd heron So my concern is that if i am setting the RTC correctly.

What I think you are saying is you have to different programs and in 1 you set the RTC from NTP and then you flash another one and try to read the time from the RTC without setting it. Since there isn't a battery backup on the ESP32 for the RTC, it won't persist if power is lost (also don't know if flashing it would clear it). From the datasheet, the RTC is kept running even in deep sleep. So I think as long as you set when you first start, then you can go into deep sleep and it should be correct when you exit deep sleep. Which makes sense since you can use a timer to exit deep sleep...

inner seal
odd heron
#

@shy oasis my fault in not being clear. i have 3 files thats of importance the main .ino file has the following code
#include <Arduino.h>
#include <WiFi.h>
#include "wifi.h"
#include "get_ip.h"
#include "rtc_esp32.h"
#include "nimBLE.h"
#include "disp_time.h"
#include "global.h"

void setup() {
// put your setup code here, to run once:
wifisetup();
while(1)
{
Serial.println("Waiting for WIFI Connection");
delay(2000);
if(WiFi.status()==WL_CONNECTED)
{
break;
}
}
Serial.println("WIFI is connected");
get_ip();
get_offset();
get_rtc_time();
disp_loop();
}

void loop() {
// put your main code here, to run repeatedly:
}
and i have 2 cpp files rtc_esp32.cpp which has the function get_rtc_time() and disp_time.cpp which ash disp_loop()

#

i have already posted the code for rtc_esp32.cpp

#

This is the disp_time.cpp which has disp_loop() function.

#include<Arduino.h>
#include<ESP32-HUB75-MatrixPanel-I2S-DMA.h>
#include"disp_time.h"
#include <ESP32Time.h>
#include"global.h"

#define R1_PIN 11
#define G1_PIN 12
#define B1_PIN 13
#define R2_PIN 14
#define G2_PIN 15
#define B2_PIN 16
#define A_PIN 18
#define B_PIN 33
#define C_PIN 34
#define D_PIN 35
#define E_PIN 17 // required for 1/32 scan panels, like 64x64px. Any available pin would do, i.e. IO32
#define LAT_PIN 36
#define OE_PIN 38
#define CLK_PIN 37

HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
HUB75_I2S_CFG mxconfig(
64, // Module width
64, // Module height
1, // chain length
_pins // pin mapping
);

//MatrixPanel_I2S_DMA dma_display;
MatrixPanel_I2S_DMA *dma_display = nullptr;

//Setting up the color values
uint16_t myWHITE = dma_display->color565(255, 255, 255);
uint16_t myBLACK = dma_display->color565(0,0,0);

void disp_setup() {

// Display Setup
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
dma_display->begin();
dma_display->setBrightness8(50); //0-255
dma_display->clearScreen();
dma_display->fillScreen(myBLACK);

// fix the screen with time
dma_display->setTextSize(1); // size 1 == 8 pixels high
dma_display->setTextWrap(true); // Don't wrap at end of line - will do ourselves

dma_display->setCursor(0, 0); // start at top left, with 8 pixel of spacing
dma_display->setTextColor(dma_display->color444(15,15,15));

while(1)
{
Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S"));
delay(1000);
}
while(1)
{
String time= rtc.getTime("%H:%M:%S");
dma_display->println(time);
delay(500);
}

}

void disp_loop() {
Serial.println("Inside Disp loop");
disp_setup();

}

#

when i print the time inside the rtc_esp32.cpp file i get the correct local time. but when i display the time inside the disp_time.cpp i am getting a different time.

shy oasis
odd heron
#

i had it inside the rtc_eps32.cpp.

odd heron
#

@shy oasis @north stream ..thanks for the help and suggestion. I have solved the issue

river yacht
north stream
river yacht
#

My google foo has been insufficent to find an answer and chat gtp gets confused...

north stream
#

Unfortunately, I don't know much about that chip. Hopefully someone else here will.

stark kindle
# river yacht My google foo has been insufficent to find an answer and chat gtp gets confused....

I was going to reply earlier but wanted to double check.

PSRAM should be available when you call malloc() in an Arduino program on an ESP32-S3 that has PSRAM. So you should be able to malloc(300000) successfully. I just ran a test that allocated 500K with no problem.

Are you sure you've selected the correct board in the Arduino IDE? If you select an S3 that has no PSRAM I don't think it will detect the extra RAM and use it.

#

You can try this program to confirm that it sees the PSRAM:

#include <Arduino.h>
#include <Esp.h>

void setup() {
  Serial.begin(115200);
  delay(2000);
  Serial.print("psram? ");
  Serial.println(psramFound());

  Serial.print("available memory ");
  Serial.println(ESP.getHeapSize());
  Serial.print("psram size ");
  Serial.println(ESP.getPsramSize());
}

void loop() {
}```
#

The getHeapSize() method will only report on built-in memory, that won't include PSRAM.

river yacht
#

i did check the psram size and it was just shy of 8mb. Though I still need to store the image somewhere, so somehow I have to add it to the 16mb flash? sorry if this seems like a dumb question!

stark kindle
#

It's not a dumb question. There's a filesystem in the flash, you should be able to store it there and then read it into RAM when you need to use it. It's possible there may be helpers for the display you'll use that can display directly from a file, I can't say for sure.

lethal yacht
#

hey, i am a bit new with building circuits so if it sounds like i have no idea what im saying please point it out because you are probably right. i have the BNO08x that i am trying to use, is it possible to use the IMU without using the library? im trying to use a regular arduino uno(ideally it would be a nano but im prototyping still) and the library takes up too much memory for the board. is it possible to just not use that library and write my own code? i wanted to make sure that its possible before i attempt to do it

leaden walrus
#

the BNO08x is complex, so the supporting libraries will end up being fairly large

#

for using with the UNO, the RVC of the BNO08x might help?

shell folio
#

Hi! This is my first time odd this discord group and I’m sorry if I sound my rude.
I want to ask you about using air pump with Arduino. Now I think about purchasing “air pump and vacuum DC moter(https://www.adafruit.com/product/4699 )”.Can I use this using Arduino? or only with the circuit series? Could you please let me know if there is a website or other reference to use for this! Thank you.

Air Pump and Vacuum DC Motor - 4.5 V and 2.5 LPM

Make inflatables or air-powered projects with this simple air pump. It's great for beginner projects and super easy to use! The pump is basically a DC motor that is powered with ~4.5V ...

vivid rock
#

or you can buy a board like this, which combines microcontroller (rp2040) and motor driver IC on one board:
https://www.cytron.io/amp-p-maker-pi-rp2040-simplifying-robotics-with-raspberry-pi-rp2040

Cytron Technologies
Maker Pi RP2040 : Simplifying Robotics with Raspberry Pi® RP2040

Simplifying Robotics with Raspberry Pi® RP2040Cytron Maker Pi RP2040 features the first microcontroller designed by Raspberry Pi - RP2040, embedded on a robot controller board. This board comes with dual channel DC motor driver, 4 servo motor ports and 7 Grove I/O connectors, ready for your next

random lion
#

Hey I am on a student atv building team who designed a teensy based data logger. We wanted to add a lcd screen to our car and found this one on digikey https://www.seeedstudio.com/WT32-4-3-Inch-Display-p-5543.html

It says it uses an rgb interface and we know it works with some version of their proprietary chinese gui designer. The driver is the st7701 as stated in the datasheet. We would really like to use the GFX library with it if anyone has any info on using the st7701 with the gfx library that would be very helpful.

Some more info is that this is the pinout we have found in the datasheet. We dont understand why the rgb lines are in such random amounts (4r 7g 5b) we think this is due to it only being a 480x272 screen instead of 480x480. As well as the fact that it does not seem like it uses SPI while every other resource we have found on the st7701 seems to use spi. Do we need to make our own screen type declarations in the gfx library? We just dont really know.

Lastly we did see that https://www.adafruit.com/product/5792 this adafruit product uses the st7701s driver so maybe we can use something from that.

image.png
ESP32-S3 Development board -WT32 4.3 Inch Display,Smart Panlee Smar...

WT32 4.3 Inch Display is a standard serial port LCD screen, Based on ESP32-S3 and core efficient development platform 8ms(8MS.XYZ), which can quickly help products to complete the application of networking + color screen upgrade.

Round RGB 666 TTL TFT Display - 2.1" 480x480 - Capacitive Touch

This is a screen for advanced hackers who like the look of a nice, round TFT screen with tons of pixels. The 2.1" diagonal sized display has 480x480 16-bit full-color pixels and is ...

#

Pinout

image.png
shell folio
north stream
random lion
#

That makes sense

random lion
#

Any good resources on setting up the gfx library

odd heron
#

i am using Adafruit_gfx_library and there are some fonts available in the fonts folder. However i want use other types of fonts that are not availabel default in the lib. is there any other utility that can convert ttf to c header file fonts ?

north stream
native dagger
#

I want to use this library (https://github.com/mathertel/Dmxserial) but it only supports boards like this one (https://www.electromaker.io/shop/product/beetle-cm-32u4-compatible-with-arduino-leonardo-atmega32u4), is it wild to use one of these to just take in dmx signals communicate with a more advanced board ?

GitHub
GitHub - mathertel/DMXSerial: An Arduino library for sending and re...

An Arduino library for sending and receiving DMX packets. - GitHub - mathertel/DMXSerial: An Arduino library for sending and receiving DMX packets.

quartz furnace
#

Got a new ESP32-C6 capable of doing Zigbee protocol

I don’t see any starter examples in the Arduino IDE , anyone have a guide ? Or is just the standard Zigbee library?

north stream
crimson kraken
#

Hello, I'm using the raspberry pi pico and I'm trying to use the adafrut HC-SR04 ultrasonic distance sensor. I am getting just random measurements from 0 to 2000 (and seemingly any random value in between.) while the sensor is facing a wall not moving. I can't detect a pattern. I removed the triggering logic and just printed out the high/low of the echo pin and it rapidly flips back and forth. Has anyone else seen this? I started with using this style shown in this tutorial https://dev.to/apollolabsbin/embedded-rust-and-embassy-timer-ultrasonic-distance-measurement-31mj but in debugging have landed here but with basically identical results. Could someone help me possibly see what I am missing? Here is my code https://gist.github.com/rust-play/42dfdeb1d284dfe3cb44b2013634a92c

DEV Community
Embedded Rust and Embassy: Timer Ultrasonic Distance Measurement

This blog post is the fifth of a multi-part series of posts where I explore various peripherals in...

Gist
Code shared from the Rust Playground

Code shared from the Rust Playground. GitHub Gist: instantly share code, notes, and snippets.

inland gorge
crimson kraken
#

Yeah I understand. The question in my mind isn't focused on the Rust as much as why would the echo io be flipping high/low without a trigger. I would think that issue is language agnostic.

#

It happens even when the pico isn't connected to the ultrasonic sensor.

inland gorge
merry drum
proven hound
#

Hey all, I hope this is the correct channel to ask in, but I have a brand new Feather M0 w/RFM69 module on it, and it's stuck in bootloader mode doing some strange things. When I try to access the D: drive it hangs Windows Explorer, when in bootloader mode (double clicking the reset) it shows the bootloader files but doesn't let me open the .txt or copy over a new bootloader. I have tried multiple USB cables (known good) and different USB ports. I've also tried closing down any USB related apps like Corsair iCue and Steelseries GG in hopes they were somehow conflicting. Any help here would be greatly appreciated.

proven hound
#

I figured it out, Arduino IDE v2.2.1 has some apparent major issue with the Feather M0 boards, it nearly bricked mine. Reverting to 1.8.19 everthing works perfectly. Although I'm struggling to get the RFM69 module to initialize. Atleast it works now, sorta.

viral prawn
#

Yo dudes I'm trying to wire Ethernet up to my ESP32-S2 dev kit using one of these https://www.amazon.com/gp/aw/d/B0B6G27DC1?psc=1&ref=ppx_pop_mob_b_asin_title but I can't find the proper way to wire it up

DWEII 2PCS LAN8720 Ethernet Board High Performance 10 100 Ethernet ...

Features High-Performance 10/100 Ethernet Physical Layer Transceiver (PHY) Supports single 3.3V supply Supports the reduced pin count RMII interface Supports HP Auto-MDIX Onboard chip package: 24-pin QFN (4x4 mm) Lead-Free RoHS Compliant package Flexible Power Management Architecture Integrated 1...

#

I'm trying to use eth.h and everyone seems to just define two pins in code. What do I do with all the other pins? Also I don't want poe

viral prawn
#

Also some people were saying they needed to flash new firmware. Is that applicable still?

stark kindle
viral prawn
#

Is there documentation for this?

stark kindle
#

I believe the ESP32-S2 only supports Ethernet via SPI. This looks like an Ethernet PHY module - basically a transceiver. It might work with a regular ESP32 but I don’t think it’s compatible with the S2, which doesn’t have Ethernet PHY support, sorry.

stark kindle
frail pawn
#

A conundrum, Is there any reason I couldnt use a HUZZAH32 with the DC motor feathering AND a PCA9685?

leaden walrus
#

in general no. just make sure the PCA's have unique I2C addresses.

frail pawn
#

jumped the last line of pads which should m ake ot 0x41 i think?

#

is the power LED on the PCA9685 MEANT to flash..

vale mauve
#

Hey, my friend wanted to get into embedded programming. I don't feel qualified to give him a strong recommendation. What do you recommend he gets? (He already has an arduino but that's it)

#

Though I did recommend, a basic robotic arm might be a good starter project. (He has a CNC machine, basic programming knowledge but I have a good amount so I can help him there)

#

So maybe a soldering iron kit or something could be good?

charred salmon
frail pawn
#

thats not encouraging

#

seems to flash in a pattern which seems odd

livid osprey
#

Is your VCC pin wired to your power source?

frail pawn
#

should be

#

is it VCC on the edge connectors or power from the screw terminal

leaden walrus
#

what's the other PCA being used?

#

a breakout?

frail pawn
#

PWM motor shield

#

the feather thing

#

oh wait, i might hav ehad the VCC hooked to the wrong thing for the last 4 hours

#

let me check

#

big brighty healthy red glow on the power LED

#

amazed i didnt let any magic smoke out

#

thankyou lollbomb, if you hadnt mentioned the LED being tied to VCC i probably would have been stuck even longer

leaden walrus
frail pawn
#

yep thats the badger, it seems to be working now, just had VCC hooked uip to er...IO17 by accident

leaden walrus
#

but you mention another PCA9685 being used as well?

frail pawn
#

yes, i had accidently hooked up io17 from the huzzah32 into the PCA9685

#

the servo is at least moving now so i think i am getting there

leaden walrus
#

what is that other PCA9685 device?

#

i guess if it's working, then doesn't matter

frail pawn
#

its the 16 channel servo/LED driver thing

leaden walrus
frail pawn
#

thats the one, they seem to work happily together now

#

just gotta work out how the servo library works now, only used the circuitpython one before which is v simple

leaden walrus
#

sounds like the mainboard is not a feather? the "HUZZAH32"?

frail pawn
#

the main board is one of these

leaden walrus
#

oh, ok, a feather

#

you aren't mating the wing and feather directly to each other?

frail pawn
#

i am, the wing passes through the pins so ive tapped them off for the PCA9685

#

It's a little ugly rn

leaden walrus
#

the VCC pin issue was on the PCA breakout?

#

the feather and wing should just mate pin-to-pin without any issue

frail pawn
#

simply a mistake on my part, i though it was first pin from the right in that image, it was in fact first on the left

#

the red wire on the mated stack was on the wrong pin, just me getting left and right mixed up 🙂

leaden walrus
#

ah. ok. that makes sense.

#

wasn't sure if it was a feather/featherwing issue or elsewhere

#

it was elsewhere - on the breakout

frail pawn
#

nah, old school PEBKAC

#

problem exists between keyboard and chair 😄

#

now to work out how the servo library works, ty for the help!

leaden walrus
#

yah, no worries. we all do those.

#

be mindful of this pin as well, since it has the motor power exposed

image.png
frail pawn
#

right, ill make sure nto to wire that up wrong haha

charred salmon
# frail pawn It's a little ugly rn

All projects go through that phase. My tabletop counter currently has a veritable afro of wires, some of which are redundant because I didn't want to alter the original wiring that I knew worked while also switching from a Trinket M0 to standalone ATTiny85.

frail pawn
#

Got it

#

Ty for the help people

grave mortar
#

kind of a weird question but I picked up an uno second hand only to get home and realize that I'm now worried that the person could have uploaded malicious code. Any advice is appreciated.

rough torrent
#

A plain Arduino Uno R3 (ex. no WiFi or BT module) will probably not be malicious, as long as the hardware wasn't modified
The only possibility I can think of is that they uploaded custom firmware to the USB to serial chip and then it will act as a bad USB

charred salmon
#

Judging by the version I have, doing that wouldn't be hard per se. The USB chip is just another ATMega, but QFN package (I think). The ICSP header for it is right there.
That said, you'd have to consider "why?" What purpose could someone possibly have to do that?
If you're particularly paranoid, and have the ability to program over ICSP, you could in theory reflash both chips with their respective manufacturer loadouts.

grave mortar
#

true true kk I'll think it over, I really wish I could just program a attiny85 with my pi pico

north stream
#

You should be able to do so: the programming protocol is fairly simple. It's easy enough to program one with an ordinary Arduino.

charred grove
#

Guys i really need some help with my project. I’m implementing duplex communication via mqtt. But .onMessage() function is not getting called at all.

Please if someone can take out a couple mins and review my code, I’ll be v thankful.🙏🏻🙏🏻

Here’s the link (single .ino file)

https://github.com/moizghumann/IoT_Temperature_Control/blob/main/sketch_dec3c.ino

GitHub
IoT_Temperature_Control/sketch_dec3c.ino at main · moizghumann/IoT_...

Contribute to moizghumann/IoT_Temperature_Control development by creating an account on GitHub.

finite wind
#

Hello guys I am doing a college project for my Embedded Systems Class. We are using an B-L475E-IOT01A board and STM Cube IDE. I am using the Paho MQTT library for subscribing and publishing to Adafruit IO (free account). My teacher provided us with the project template. The problem I have is that I cant subscribe to more than 5 topics using the STM microcontroller. It can be any 5 topics, but the 6th and the following always fail instantly. If I use an online MQTT client such as MQTT.cool I can subscribe to all the topics and it works perfectly. I am attaching the main.c from my project. If I use "g00409592/feeds/#" I subscribe to all feeds and that works. But I then get a JSON, csv and other formats of responses that I dont really need.

📎 main.c
#

This is the section where I try to subscribe

ret = MQTTSubscribe(&client, "g00409592/feeds/00", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 00\n\r");
        ret = MQTTYield(&client, 2500);
    }

    ret = MQTTSubscribe(&client, "g00409592/feeds/01", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 01\n\r");
        ret = MQTTYield(&client, 2500);
    }

    ret = MQTTSubscribe(&client, "g00409592/feeds/02", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 02\n\r");
        ret = MQTTYield(&client, 2500);
    }
    
    ret = MQTTSubscribe(&client, "g00409592/feeds/10", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 10\n\r");
        ret = MQTTYield(&client, 2500);
    }
    
    ret = MQTTSubscribe(&client, "g00409592/feeds/11", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 11\n\r");
        ret = MQTTYield(&client, 2500);
    }
    
    ret = MQTTSubscribe(&client, "g00409592/feeds/12", QOS1, (subscribeMessageHandler));
    if (ret != MQSUCCESS) {
        printf("\n\rSubscribe failed: %ld\r\n", ret);
    }
    else {
        printf("\n\rSubscribed to 12\n\r");
        ret = MQTTYield(&client, 2500);
    }
river yacht
#

Anyone have any experience listening to their automotive can-bus with the can m4 feather?

odd heron
#

Hi can anyone help me in understanding the inner if statement in following code

if(WiFi.status()==WL_CONNECTED)
{
Serial.println("Setting up RTC");
//Getting the time based on RAW Offset and DT Offset
configTime(19800, 0, ntp_server);
struct tm timeinfo;
if(getLocalTime(&timeinfo))
{
Serial.println("inside the if statement");
rtc.setTimeStruct(timeinfo);
}
//print_local_time(); Printing RTC for testing purpose.
Serial.println("get_rtc_status function executed");
Serial.println("RTC timer set");
Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S"));
return rtc_status=true;
}

odd fjord
opal iris
#

Hello all,

I am working with HC 05 Bluetooth module but I am not able to connect it to my laptop. In device manager, I am able to see com ports. But not able to connect.

grave mortar
#

god I'm so close using TinywireS I can write back a multibyte response but I need to write back 45 hex values and my attiny85 locks up when I do like 10 or more. I can't figure out what to searchto fix this.

image.png
grave mortar
#

ah okay so I've found that 'm not supposed to send more than 1 byte but can't for the life of me figure out how to send a 90 byte reply 😦

frail pawn
#

a random google suggests tinywire has a maximum 16byte buffer

#

idk if this will help at all

#

but yoiu could try

#

#define TWI_RX_BUFFER_SIZE ( 128 )
#define TWI_TX_BUFFER_SIZE ( 128 )
#include <TinyWireS.h>

#

but i will caveat this with i have no experience with the library itself and this is simply a comment i found on github

grave mortar
frail pawn
#

Gl!

grave mortar
# frail pawn Gl!

nice yeah the older library works now I just can't figure out how to make the wire library read more than 32 bytes ahah'

frail pawn
#

just out of interest what are you communicating between

grave mortar
#

currently an uno and an attiny85, the 85 is to emulate a battery gas gauge on another device, so I think I'll actually be okay because that i2c host shouldn't crap out like the uno

frail pawn
#

ah right, i was going to say one of the bits of adbvice ive been given befire is dont use i2c between two microcontrollers

#

but i guess that doesnt apply

grave mortar
#

yeah I think I'm good now hopefully I can run the 85 at 1.8v but if bot I'll just level shift

frail pawn
#

i only looked into this because the little rover ive been building has an esp32 and a pi0 and i was considering making them talk to each other

grave mortar
#

what would they talk about

frail pawn
#

and someone was like "ppf use uart fool"

#

well rnh the pi0 literally just transmit video from the onboard camera, the esp32 controls the motors and servos, if they talk i can control the rover from a web interface as well as send feedback of certain sensros and such to the video stream

#

there is a very simple pan tilt for the camera with servos but there is no indication of where the servos currently are so it can get disorentation, you try to dry the rover forward but turns out WOOPS you have the pan head 10 degrees to the left so it doesnt drive straight

grave mortar
#

lol nice that's sick

#

uart is good if it's available and reliable but i2c is pretty cool

frail pawn
#

im using i2c for the servos and motors so that was my first idea

#

the problem is now i have it together and working the ADHD bit of my brain is like "you no longer care about this"

vague inlet
#

excuse the terrible drawing

theplan.png
#

I was wondering if anyone knows the best way to go about this, I want to use an arduino to control a motor (I was thinking stepper) to pull a weight of about 2.5 kg from and too a specific height. the motor would roll up and lower a chain or rope that is attached to the object, so I dont think the chain or rope will move too far away from drive shaft. I did just try it with a nema 17 and a a2988 board but from my tests its seems really weak.
was thinking about swithcing to nema with planetary gear reduction https://www.omc-stepperonline.com/nema-17-stepper-motor-bipolar-l-48mm-w-gear-ratio-27-1-planetary-gearbox-17hs19-1684s-pg27 like this one

frail pawn
#

you need to calculate the torque required, which is based on the weight of the load and the width of the pulley and stuff, im not an expert, you can probably find a calculator online

granite pecan
#

Hi, I am looking the BMP3XX example code and struggle to understand it. I want to use it at RPi Pico which has 2 I2C ports (Wire and Wire1). Where is the Wire.begin() code? https://learn.adafruit.com/adafruit-bmp388-bmp390-bmp3xx/arduino

Adafruit Learning System
Adafruit BMP388 and BMP390 - Precision Barometric Pressure and Alti...

The BMP3xx has better precision than ever, which makes it excellent for environmental sensing or as a precision altimeter. It can be used in either I2C and SPI configurations.

#

Is it written in the included codes or something?

quartz furnace
#

https://github.com/gabrielchristino/ANCS/blob/main/ANCS.ino

This is a neat library that allows you to connect a ESP32 with Bluetooth to your iOS device to get the notifications (ANCS)

It works perfectly and prints messages with serial print

It’s either getting the data as individual strings or as a single data dump

I’m having a problem finding where the “message” of the notification is — example if it’s a WYZE Camera notification— what the message was from WYZE

This

GitHub
ANCS/ANCS.ino at main · gabrielchristino/ANCS

Projeto para ESP32 suportar as notificações do iPhone, usando ANCS - gabrielchristino/ANCS

#

What I’m looking to do is find the actual “message” and be able to print it to a TFT

#

I’ve gone on my laptop and did a “find” for the usage of “Serial.print”

#

I looked at all 37 and it’s not clear how they name the storage of the notification

#

Above shows the print outs

#

I’ve only been able to find how it’s prints the “ category” based on a “case statement”

#

374 lines of code — with a .cpp file and a .h file as well. I just can’t determine the data type message is stored to be able to update a TFT display

frail pawn
#

You could contact the creator?

quartz furnace
#

I might have to do just that —- but it would have to be somewhere within the code ?

#

unless if they’re doing some kind of secret code magic

frail pawn
#

oh its in there, but if you can get an answer from the person who wrote it its going to be much easier than hoping someone with the knowledge has half an hour to trawl through it 😛

unreal monolith
#

OK, figures all I had to do was post and I'd find the answer!

With my last ESP32 board I didn't want to reset the board when I connected the serial terminal so I made the default state of DTR/RTS as OFF. Turns out that for some reason either CP or the ESP32-S2 needs DTR ON in order for the serial terminal to work.

Now I'm curious if this is a CP thing or something with the ESP32-S2. I know for sure that with a ESP32 I can have DTR OFF and communication works just fine but of course that's not going through USB like I'm currently connected.

dusk orchid
# granite pecan Hi, I am looking the BMP3XX example code and struggle to understand it. I want t...

Wire.begin has usually been called for you. Sadly the learn guide doesn't show the call to begin, but it does link you to the driver repo on GitHub. There you can see in the header file the driver takes an argument for a wire object here https://github.com/adafruit/Adafruit_BMP3XX/blob/master/Adafruit_BMP3XX.h#L45-L46 then in the cpp file in same repo https://github.com/adafruit/Adafruit_BMP3XX/blob/master/Adafruit_BMP3XX.cpp#L83-L86 it relies on an Adafruit BusIO (mentioned in library.properties file) object called Adafruit_I2cDevice which starts the wire device here https://github.com/adafruit/Adafruit_BusIO/blob/master/Adafruit_I2CDevice.cpp#L31

fallow valve
#

how I two program shift regs to control a 20 led bar segment? since two can control 10 leds

dusk orchid
fallow valve
#

Working with 20 is the harder thing to do

west quarry
#

I am using an Arduino to get data from various sensors (e.g. temp, humidity, pressure, etc)

I have the Arduino connected to a rpi which will read the serial data and send it to a DB.

My question is what is the best data format? Should I send all sensor data at once, or each sensor value independently?

Any help would be great! (please ping me)

leaden walrus
#

how are you talking between the arduino and the pi? serial?

west quarry
leaden walrus
#

the usb data path would be something different

#

is it a 5V logic arduino board?

west quarry
#

Elegoo Uno R3

#

So I believe so?

leaden walrus
#

yep. uno is 5V.

#

pi's are 3.3V logic. so might need to level shift to wire direct.

#

but in terms of when/what to send, should be fine to send everything at once.

#

sort of depends on your use case

#

could just send a json string with the data in it

#

that'd make parsing on the pi side easy

west quarry
#

Gotcha, that would work, yeah

#

can the RX/TX pins be used for sending this kind of data? or am I totally wrong? 😅

leaden walrus
#

yep

#

are the sensors using I2C?

west quarry
#

A couple of them are, but some are just analog

#

I got a handful of sensors to try out, my current plan is to get them all working and since there's crossover, see which ones are more accurate/reliable

leaden walrus
#

could also maybe read the sensors directly from the pi?

#

would need to get an ADC for the analog sensors

#

but there are numerous I2C based ADCs available

#

unless there are sensors that have really specific hard timing requirements that make using the UNO necessary

west quarry
#

These are the sensors in questions
https://thepihut.com/products/adafruit-stemma-soil-sensor-i2c-capacitive-moisture-sensor-ada4026
https://thepihut.com/products/capacitive-soil-moisture-sensor
https://thepihut.com/products/dht22-temperature-humidity-sensor
https://thepihut.com/products/adafruit-bh1750-light-sensor-stemma-qt-qwiic
https://thepihut.com/products/adafruit-dps310-precision-barometric-pressure-altitude-sensor
https://thepihut.com/products/bme280-breakout-temperature-pressure-humidity-sensor

#

Currently I have the DHT-22 and the BME280 ready to use - I haven't soldered or tried out the rest yet

leaden walrus
#

other than the one soil sensor, the rest are I2C

#

since it would make things simple, might be worth considering getting everything hosted on the pi

west quarry
#

Would the pi zero be able to handle all of these sensors at once?

leaden walrus
#

no pi would be happy with the DHT-22

#

and pi's don't have ADC, so no way to read the one soil sensor without one

#

but a pi would have no issues reading a half dozen I2C sensors

#

pi's have native I2C (in case that wasn't clear)

west quarry
#

Gotcha. The other sensors also handle what the DHT-22 does, so not a big deal

#

part of the reason why I got overlap in the first place (mainly because I was worried I'd screw up soldering somewhere)

leaden walrus
#

for that, could utilize the STEMMA QT connectors as much as possible

west quarry
#

awesome, thanks for your help!

leaden walrus
#

and various ways of adding a STEMMA QT to a pi without soldering

west quarry
#

I did actually pick up a few of these cables at the same time. A bunch of 4 pin ones

#

Seem to be way too big though. I guess there are other variants

lusty vault
#

way too big? ConfusedDog

west quarry
#

Same connectors used by the DHT-22 - I guess they are not the same type of connector. Pretty sure they are needed for one of the soil sensors. I can't find the sensors right not to check.

leaden walrus
#

the DHT-22 is not i2c. it's its own thing.

west quarry
#

Both soil moisture sensors have that connector - I guess I need to get those I2c small cables!

west quarry
#

I may just solder them instead. At least for the board sensors.

leaden walrus
#

the i2c cables will do nothing to help with the DHT-22

desert bough
#

hello, very much a noob with the more technical part of electronics and am hesitant to dip my toes in for fear of breaking something. recently i began a project which will require me to make a switching voltage regulator circuit with a MOSFET and some other components to provide 5V down from a 12V supply (relatively high load - many neopixels being driven off of one regulator). However, I know switching regulators can be very noisy, at least compared with linear regulators, and was worrying about how a microcontroller might react to a noisy power feed. would a normal mcu, like the metro mini, do ok with that? what inductor and capacitor do i pick for the switching circuit to minimize noise?

leaden walrus
#

there are ready made products for dealing with converting 12V to 5V. but it sounds like you need to design your own?

lethal yarrow
#

I would recommend powering the MCU off the 12V source as the energy loss will be minimal. Leave the big switching regulator to power the LEDs.

#

Assuming you are ok with using a prebuilt switching regulator module, I recommend getting a mean well DC-DC converter. While there are chips that make switching regulator design relatively easy, there are still some design complexities that are best avoided when possible.

native dagger
#

Is accel stepper compatible with the rp 2040 or samd21?

#

I can't find a straight answer.

lethal yarrow
#

Looking at the source code, I don't see anything that is architecture-dependent. That being said I would consider its implementation to be... suboptimal. It tries to implement the timing purely in software with calls to micros(), which can result in a lot of jitter if you are doing other things and don't call the runStepper() function fast enough.
https://github.com/waspinator/AccelStepper/blob/master/src/AccelStepper.cpp

GitHub
AccelStepper/src/AccelStepper.cpp at master · waspinator/AccelStepper

Fork of AccelStepper. Contribute to waspinator/AccelStepper development by creating an account on GitHub.

native dagger
#

How would you characterize fast enough?

native dagger
lethal yarrow
#

Depends on your requirements. I would probably use a stepper driver though.

native dagger
#

I am using a stepper driver, this library allows for that. Driver takes just step enable and direction. All I need is to spin a stepper and read a pin

lethal yarrow
#

Then just use it I guess, unless you're needing much more precise realtime control.

sacred lake
#

hello, i have an arduino nano with just a potentiometer hooked up and the little "TX" light is flickering and it randomly freezes. this is my just my current code:

void setup() {
  Serial.begin(9600);
}

void loop() {
  int analogValue = analogRead(A0);
  float percentage = (float) analogValue / 1023 * 100;
  int roundedPercentage = (int) floor(percentage);
  String output = String(roundedPercentage);

  Serial.println(output + "%");
  delay(50);
}```
#

ive tried 100ms of delay but its still happening

stable forge
sacred lake
stable forge
sacred lake
stable forge
#

remove that package, it's not really useful these days

sacred lake
#

i just removed it

coarse prism
#

Hello, I am trying to use the Adafruit Pygamer with Arcada utilizing PlatformIO as the dev environment. I can compile and upload Arcada examples to the Pygamer and everything works except the display. The same code compiles, uploads and works fine with the Arduino IDE.

I found this issue: https://github.com/adafruit/Adafruit_Arcada/issues/44 which seems to be related to what I'm experiencing.

Anyone got a clue how I can get going? All the device's bells and whistle work, just it seems drawing commands are broken when compiled with PlatformIO.

inland gorge
coarse prism
#

Yeah I did. Actually the latest versions have some new code to check if you're using those boards and automatically ifdef them out. But I commented it out anyway, Still doesn't work.

#

It seems like the board doesn't hang when the drawing routines are called, but they don't seem to do anything. When any program I write boots up I just get a white screen. LEDs, gyro, speaker, buttons, etc all work. Just no drawing commands make it to the screen.

coarse prism
#

I'm probably stuck with circuitpython

#

I've tried everything for hours

#

I tried to boil it down to just the display:

#include <SPI.h>
#include <Adafruit_ST7789.h>

#define ARCADA_TFT_SPI SPI1
#define ARCADA_TFT_CS 44  // Display CS Arduino pin number
#define ARCADA_TFT_DC 45  // Display D/C Arduino pin number
#define ARCADA_TFT_RST 46 // Display reset Arduino pin number
#define ARCADA_TFT_LITE 47
#define ARCADA_TFT_ROTATION 3
#define ARCADA_TFT_DEFAULTFILL 0xFFFF
#define ARCADA_TFT_WIDTH 320
#define ARCADA_TFT_HEIGHT 240

Adafruit_ST7789 *tft;

void setup() {
  // put your setup code here, to run once:
    new Adafruit_ST7789(&ARCADA_TFT_SPI, ARCADA_TFT_CS, ARCADA_TFT_DC, ARCADA_TFT_RST);

    tft->init(240, 320);
    tft->setRotation(ARCADA_TFT_ROTATION);
    tft->fillScreen(ARCADA_TFT_DEFAULTFILL);
}

void loop() {
  // put your main code here, to run repeatedly:
  tft->fillScreen(0xFF00);
  delay(100);
  tft->fillScreen(0x00F0);
  delay(100);
  tft->fillScreen(0x000F);
  delay(100);
  tft->fillScreen(0x0000);
  delay(100);
}

Still nothing 😩

fallow valve
edgy ibex
#

I'm looking to build a project using one of these: https://www.adafruit.com/product/3357 to provide playback of ogg-vorbis files. I note from the associated learn guide at: https://learn.adafruit.com/adafruit-music-maker-featherwing/play-music that interrupt based playback doesn't work on ESP32 Feathers. What about the ESP8266? I happen to know from another project I've built that interrupts work just fine on an ESP8266, but I'm concerned that if the "more sophisticated" ESP32 family won't work, it may also mean that ESP8266s won't work.
Before I commit to starting this, is there any explicit information about interrupt playback and an ESP8266 Feather? The lack of interrupt playback will be a complete deal-breaker, given what else the project is going to be doing.

Adafruit Music Maker FeatherWing - MP3 OGG WAV MIDI Synth Player

Bend all audio files to your will with the Adafruit Music Maker FeatherWing! It's a fun-size version of our Music Maker shield for Arduino! This powerful wing features the ...

Adafruit Learning System
Adafruit Music Maker FeatherWing

Bumpin' tooonz for your Feather board

analog stag
#

I downloaded the Aurdino IDE last night? Then installed the OLED 1306 - as I recall, in order to use for the ESP32-S3 display? Umm... now my OS broken 😆 - its on Linux.

I'm assuming the issues are related because it was the only thing I was doing. Prior to the only thing strange that happened leading up was that Nautilus was uninstalled - which I don't know how or why.

I'm not sure if that's a virus related thing but, just wanted to let someone know. Related things occurring? Not even sure how to word that as a concern.

sacred lake
#

Hi, I just got some new Nanos and they're not quite working with my breadboard. GND and 5V work via the breadboard but not the analog and digital IO ports. What I mean by that:
I have a Potentiometer connected to A1 and it gives out a random output (like when nothing is connected to the port) when I connect it via the breadboard. But if I hold it onto the pin, it works and spits out the correct value. Fritzing pics will follow as soon as it finishes compiling...

#

OR analogRead(A1) just prints out 0

#

also they are not soldered on (the pins)

coarse prism
#

Hello, when I am using bossac to write my image to my Adafruit Pygamer flash, it seems all QSPI flash filesystem data is also lost. I'm not using the -e erase flag, so what else can I do to keep that data persisted?

#

Actually it seems to lose that data even after power cycling the device 🤔

viscid nacelle
#

Is there somewhere a Ardunio specification, telling A0 is the default, first "DAC" pin or is this by pure luck 🙂

sacred lake
#

this DOES work

image.png
frail pawn
#

what is the orientation of the rails on your breadboard

#

because usually those central rows in the orientation shows would only connect to each other vertically

#

so the first one wouldnt work because there is no connection

#

this is how you would usually put a nano on a breadboard

sacred lake
#

thats how my breadboard looks

muted gyro
#

those pins all look connected and you don't want that.

image.png
frail pawn
#

100% would be

#

we cant troubleshoot your sketch if it isnt the same as what you have 😛

sacred lake
frail pawn
#

are those headers on the nano soldered on the bottom?

sacred lake
#

nope

frail pawn
#

then that is almost certainly the problem, the pin isnt making a solid connection to the hole on the board

sacred lake
#

bc on my old one they were already soldered on

frail pawn
#

at the moment you have no solid connection between the board and the pins, that means you are relying on the pins touching the pads and that isnt a good connection

#

so yeah, if you want to use it like this on a breadboard you will have to solder the headers on

sacred lake
#

okay so thats what I thought

#

thanks!

frail pawn
#

np

coarse prism
coarse prism
#

I could share my code -- but could someone simply confirm for me that the 8MB flash memory on the pygamer shouldn't get reset on power-cycle or reflash?

north stream
#

I'm wondering if there's a startup routine that clears the flash when it's reflashed.

#

Or the procedure just overwrites the entire thing instead of just the code portion. But I don't know.

frail pawn
#

Yeah i have no experience with it sadly, you could always flash example code or something and see if that does it too

coarse prism
#

Yeah I feel like it should be persistent but some bug in my code is gaslighting me and making me unsure lol

#

I will study the examples more closely

north stream
#

It would sure be handy if the filesystem part were persistent but I don't know much about how that end of things works.

coarse prism
#

Ah the problem is in order to use the filesystem stuff you literally have to format the flash data with a filesystem

#

makes sense... lol

safe crown
#

Greetings i have a question about the esp32-S3 Arduino toolchain. I'm designing a board for our lab, it will be released a OH. Nothing fancy, esp32-s3 with some specifics, sensors and form factor. We need custom partition tables and some default pinout remapping / renaming hence a nzw variant in the core.
Our options are:

#
  • fork the toolchain and install a repo at our gitlab
#
  • ask to have our board integrated in the current toolchain
#

Anyone here knows what is the process for our institute to apply for board support integration at Espressif ?

stable forge
#

you have to sign a Contributor agreement when you first make a PR

safe crown
#

Awesome @stable forge exactly what i needed to know. I'll place pull request when the board is mature !!!

pliant aurora
#

I have a strip of WS2812B LEDS, I'm only trying to power 5 of them on my nano. I can test voltage throughout the strip but the lights won't turn on. Is this the right place to ask for help?

leaden walrus
#

are you using arduino?

viral prawn
#

Hey guys, I want to add Ethernet to my project. I have an esp32-s3-wroom-1 dev kit and a esp32-s2-solo-2 devkit. I have some lan8720 boards for Ethernet. I loaded up the Ethernet example in Arduino IDE, but there is no indication of how to wire it up and I can't seem to find any good examples online either. Can I get some advice on how to proceed or can you point me to some example? Also, if it's possible that this is not a good esp32, then can someone tell me which I should use that will allow me to use this Ethernet chip?

#

Thanks dudes

#

In all the examples provided in eth.h it seems that gpio pins are only assigned are mdc and mdio though other pins seem to be necessary. I'm pretty new to all this, but for example do I just connect the clock pin to gpio 0 without doing any setup on it?

inland gorge
inland gorge
viral prawn
#

So what shield can I buy that will work?

#

Or please tell me if this is stupid and I should be doing it a different way

inland gorge
viral prawn
#

Yeah I've been trying that, but how do I know what pin goes where? Like rx0, rx1, tx1, nc, tx_en etc?

#

I assumed this was written with the olimex in mind or something similar

granite field
#

Anybody know if it it’s possible to extend the height of a rotary knob? Need it to go through 3/4” piece of wood.

IMG_3329.jpg
inland gorge
# granite field Anybody know if it it’s possible to extend the height of a rotary knob? Need it ...

I've made pot shaft couplers out of tubing or 3d printed pieces. Here's a 3d printable one on Printables https://www.printables.com/model/543306-potentiometer-shaft-adapter-extender-updated-1222 (I've not tried it but it's similar to ones I've made myself)

Printables.com
Potentiometer Shaft Adapter / Extender (Updated 12/22) by jimmiedav...

Adapts an available (Philmore) D-Shaft volume control pot to a long split-spline-shaft. | Download free 3D printable STL models

granite field
inland gorge
inland gorge
#

hopefully that makes sense

granite field
granite field
opal iris
#

Did anyone use DRV8833 motor driver to driver N20 motors?

AO1 & BO1 are not getting high when AIN1 & AIN2 are digitally high..
AIN1 goes to 5v but AO1 goes to only 0.17v

DRV8833-Dual-Driver-Pinout.jpg
#

Please help me to resolve this issue

deep merlin
#

Can anybody recommend a library for driving larger (more then 64x64) RGB matrix displays using an Arduino mega? Alternatively, would an raspberry PI be better?

north stream
# inland gorge I've made pot shaft couplers out of tubing or 3d printed pieces. Here's a 3d pr...

The tubing idea is a good one. Radio Snack used to offer a "color TV adjustment tool" set which contained a variety of plastic drivers for trimpots, hex tuning cores, etc. that also included a nice piece of ribbed plastic tubing that worked great as a potentiometer shaft extender. My dad and I would cut bits off it for various pots, then buy another set when we ran out. While Radio Shack isn't really relevant any more, the tools are still out there. Here's one example https://tecratools.com/product1120.html. Apparently the bit I'm referring to is called the "Extend-It" and is made of delrin (or "derlin" as the product description reads).

odd fjord
#

@north stream I always wondered what that was for 😉

IMG_6005.jpg
north stream
#

It is presumably intended to increase the reach of the tools themselves, but I think I've only used it that way once.

viral prawn
inland gorge
inland gorge
inland gorge
viral prawn
cold lagoon
#

Hey. Is it possible to have functions inside the second esp32 core? or is it possible to access functions in core 1 from core 2?

stark kindle
# cold lagoon Hey. Is it possible to have functions inside the second esp32 core? or is it pos...

On dual core ESP32s, Arduino programs run on the second core. WiFi and the network stack run on the first core. You can run tasks on either core using the FreeRTOS task functions that are built into ESP-IDF, the SDK that the Arduino core is built on. Lots of tutorials online about how to do that. Just be careful about protecting access to shared data between cores, and be careful not to lock up the core the network stack is running on.

charred salmon
#

Also, wait, you're putting input to AIN1 andAIN2 at the same time? I'm pretty sure that puts the motor into "braking" mode, which effectively shorts the outputs together (but not to power) in order to cause the motor to self brake and come to a stop.

#

Ok, yeah. If you're putting digital high on both AIN pins, you're causing the motor to go into a braking state.
If you're using PWM to get speed control the truth table is... weird.

image.png
#

Additionally it sounds like your motor is between AOUT1 and BOUT1, which is wrong. It should be between AOUT1 and AOUT2.

opal iris
#

AIN1 ->HIGH
AIN2 ->LOW

radiant wind
#

Yo would it be possible to use an arduino with a 128x64 OLED i2c display to show my PC CPU and GPU Temps? I have the screen running with the adafruit code library that has examples so the screen works but I dont know how I could get the CPU and GPU temps up and running or if it's possible at all.

#

This is bc for some reason I couldn't get the backlight to work on a 16x2 display and had one of these, which are way easier to get up and running

#

Although if anybody knows why a 16x2 lcd might show rectangles that fade in and out with a 10k potentiometer but never show anything, that would help too.

boreal peak
#

Hello!

Is it possible to use the ST7735 160x128 breakout shield with the Arduino Rp2040 connect?
The normal TFT works but not the SD card reader.

Is there a way to use both with the Mbed core and not the Pico core?

#

I really want to make use of the built in accelerometer and WiFi module which supposedly only works with the Mbed core.

#

But the SD reader on the Display doesent work.

edgy ibex
#

I'm switching an ESP8266 feather project from Arduino to PlatformIO. Everything seems to be OK, except for one warning that's coming up:

src\sprinkler.cpp: In function 'void ProcessWeb()':
src\sprinkler.cpp:644:35: warning: 'WiFiClient WiFiServer::available(uint8_t*)' is deprecated: Renamed to accept(). [-Wdeprecated-declarations]
  644 |         webClient = web.available();
      |                                   ^

The arduino documentation is less than helpful, I can't find any mention of the fact that WiFiServer::available() has been deprecated. Should I just replace the call with webClient = web.accept(); and move on with my life, or is there some subtle difference in the bahaviour of available() and accept() that might cause me problems?

icy echo
#

How can I download Arduino.h on linux so I can compile C files for the arduino

leaden walrus
left mauve
#

how do I get started with writing c/c++ (using arduino i guess) for the pygamer

leaden walrus
left mauve
#

I have alreadyd downloaded the bootloader

left mauve
leaden walrus
left mauve
#

blink worked

#

but there seems to be somthing wrong with my arcada lib install

leaden walrus
#

the sketch compiled and uploaded without issue?

#

(blink works so your basic arduino setup seems OK)

left mauve
leaden walrus
#

try opening serial monitor and see if there is any output there

left mauve
#

ok

#

I think it does work

#

forgot about the serial monitor

#

it works

leaden walrus
#

so it wont run until serial monitor is opened

#

you can comment out that line so it'll run after uploading

#

that wait is mainly useful for troubleshooting

left mauve
#

ok

#

thank you

#

btw do you know if there is documentation on the arcada library

leaden walrus
#

and more API doc than "how to" doc

left mauve
leaden walrus
#

hmm..yah. its missing a docs badge.

#

like that, which other repo readme's have

icy echo
leaden walrus
#

i don't think its that simple. you'd basically be recreating arduino-cli.

icy echo
#

I could try platformio but I really just want to beable to write code without arduino.h but I want to make sure I can compile code with arduino.h first

leaden walrus
#

if you want to use arduino "stuff", arduino-cli is what you want

#

if you want to just bare bones, than don't even need to touch arduino stuff

#

not sure what you mean by "without arduino.h"

icy echo
#

I know but I want to make sure I can compile and upload code before getting rid of Arduino.h

leaden walrus
#

somewhere something will include that, if using arduino build environment

#

why are you wanting to not include that?

icy echo
#

To try to learn how to write code to control the outputs without Arduino.h

leaden walrus
#

if you're using arduino, you need arduino.h

#

are you wanting to just learn how to build code without arduino in general?

icy echo
#

yes.

#

I saw this video https://www.youtube.com/shorts/lUaPIvgBfdE where he says after doing arduino stuff to write raw avr C and I want to do that

YouTube
Low Level Learning
How to Start in Embedded Programming #programming #lowcode #tech #c...

Live on Twitch: https://twitch.tv/lowlevellearning

Arduino - AVR - STM32 📚🚀 #Cplusplus #CodingTips #OperatorOverloading #MatrixMultiplication #CodeTricks

🏫 COURSES 🏫 Check out my new courses at https://lowlevel.academy

🙌 SUPPORT THE CHANNEL 🙌 Become a Low Level Associate and support the channel at https://youtube.com/c/LowLevelLearning/join

...

▶ Play video
leaden walrus
#

ok. one sec. ill look at that to get more context.

#

unfortunately what they describe is a bit vague

#

you can do "raw avr" in ardunio if you want

#

that would probably be an easier way to transition

#

do you have any hardware programmers? for bare metal uploading to an AVR chip?

icy echo
#

No.

leaden walrus
#

then you won't be able to do things fully without arduino

#

in general

#

what arduino board do you have?

icy echo
#

A arduino mega 2560

leaden walrus
#

i guess you could gcc compile and then upload via the bootloader

#

that'd be all without arduino

#

i think avrdude would be the command line tool for uploading

icy echo
#

Ok

muted gyro
# leaden walrus i guess you could gcc compile and then upload via the bootloader

In class I'm right now using Atmelstudio to write completely arduino-less raw c or even assembly.
But we had to install the Arduino IDE to get the drivers and avrdude.
Then we run avrdude (from the Arduino install) from inside Atmelstudio. Basically a copy-paste cli command.
So we're only using the drivers and avrdude from Arduino.

#

(as hardware we're using Arduino Nano)

leaden walrus
#

^^ yah, something like that

icy echo
#

I found a video about writing raw C on the arduino uno https://www.youtube.com/watch?v=j4xw8QomkXs&ab_channel=LowLevelLearning

YouTube
Low Level Learning
Getting Started with Baremetal Arduino C Programming | No IDE Req...

When I started writing code for the Arduino, I felt like the code was abstracted too far away from the processor. While this is the intent of Arduino, I wanted to get down to a lower level. In this video, we learn how to write native C code without any of the Arduino IDE overhead and flash it directly to your Arduino. We go deep into the world o...

▶ Play video
leaden walrus
#

i'd still suggest just starting with "raw AVR" in arduino first

#

can just ignore that arduino is in the mix

#

@icy echo i think that video is describing the workflow you want. does it help?

left mauve
#

how do you draw frames on the pygamer

#

I've found:

if (! arcada.createFrameBuffer(ARCADA_TFT_WIDTH, ARCADA_TFT_HEIGHT)) {
Serial.print("Failed to allocate framebuffer");
while (1);
}

framebuffer = arcada.getFrameBuffer();

#

how do you draw to the framebuffer and do you need to use a framebuffer to draw to the screen?

elder hare
#

erh me so stupid! question:

i have a class "Effects" that is going to use some variables from the class "MatrixDisplay"

how do i reference the MatrixDisplay class inside the Effects class so i can get access to the variables i need to use in Effects? 🙂

left mauve
#

is it normal that it takes long to compile arduino code using the arcada library

leaden walrus
#

define long

#

@elder hare there's no generic answer to that. you could pass a reference, but if the variables are private, you'd wouldn't be able to access them.

elder hare
#

and no i am not an advanced coder xD never have been

leaden walrus
#

yah, it could become a whole OO design discussion.

#

but if public, pass a ref and access directly.

left mauve
leaden walrus
#

seconds? minutes? hours?

left mauve
# leaden walrus seconds? minutes? hours?

regular arduino code only takes a few seconds. With pygamer it took around a minute to compile this simple program:

Adafruit_Arcada arcada;

uint16_t *framebuffer;

const int16_t width  = ARCADA_TFT_WIDTH;  // TFT dimensions
const int16_t height = ARCADA_TFT_HEIGHT;

#define BLUE 0x001F  // Define BLUE color

void setup(void) {
  Serial.begin(9600);
  // Start TFT and fill black
  if (!arcada.arcadaBegin()) {
    Serial.print("Failed to begin");
    while (1);
  }
  arcada.displayBegin();
  
  // Turn on backlight
  arcada.setBacklight(255);

  if (! arcada.createFrameBuffer(width, width)) {
    Serial.print("Failed to allocate framebuffer");
    while (1);
  }
  framebuffer = arcada.getFrameBuffer();
}


void loop() {
  px(0, 0, BLUE);
  arcada.blitFrameBuffer(0, 0, true, false); // block on blit
  }

void px(uint8_t x , uint8_t y, uint16_t clr){
  framebuffer[y * width + x] = clr;
  }```
leaden walrus
#

it could be

#

UNO is a much simpler chip

#

and arcada brings in the kitchen sink in terms of libraries

#

so there will be a lot to compile

left mauve
#

well, it doesn't matter that much.

leaden walrus
#

@elder hare

class Foo1 {
  public:
      int bar = 23;
};

class Foo2 {
  public:
    void bar(Foo1& foo);
};

void Foo2::bar(Foo1& foo) {
  Serial.println(foo.bar);
}

Foo1 f1 = Foo1();
Foo2 f2 = Foo2();

void setup() {
  Serial.begin(115200);
  while (!Serial);
  Serial.println("Foo Class Test.");
  
  f2.bar(f1);  
}

void loop() {
}
#

There's Probably A Better Way™®©

#

@left mauve that sketch took about 30 seconds to compile here. i think the main culprit is acarda's kitchen sink approach to library includes (which is by design). but ARM builds (like pygamer) are also generally going to take longer than AVR builds (like an uno, not sure if thats what you mean by regular arduino)

left mauve
leaden walrus
#

yep. definitely. mines not super fast either tbh.

#

i go have lunch with some builds 🙂

midnight pewter
#

nvm, I have figured it out 😅

left mauve
leaden walrus
left mauve
#

I'm just drawing directly to the framebuffer so I don't think it does anything

left mauve
leaden walrus
left mauve
#

what type is the framebuffer? is it an array?

#

I found this in the pixeldust example:

memset(framebuffer, 0x00, width*height*2);
it makes the top part of the screen flicker for some reason

leaden walrus
left mauve
#

thanks

leaden walrus
#

not sure why you are getting white for black

#

this works as expected testing here on a pygamer

# 
#include <Adafruit_Arcada.h>
Adafruit_Arcada arcada;

void setup() {
  Serial.begin(9600);
  Serial.print("Hello! Arcada TFT Test");

  // Start TFT and fill black
  if (!arcada.arcadaBegin()) {
    Serial.print("Failed to begin");
    while (1);
  }
  arcada.displayBegin();

  // Turn on backlight
  arcada.setBacklight(255);
}

void loop() {
  arcada.display->fillScreen(ARCADA_BLACK);
  delay(1000);
  arcada.display->fillScreen(ARCADA_RED);
  delay(1000);
  arcada.display->fillScreen(ARCADA_GREEN);
  delay(1000);
  arcada.display->fillScreen(ARCADA_BLUE);
  delay(1000);
  arcada.display->fillScreen(ARCADA_WHITE);
  delay(1000); 
}
boreal peak
elder hare
# 
void Effects::MoveX(byte delta)
{
    CRGB tmp = 0;

    for (int y = 0; y < _matrixDisplay.VPANEL_H; y++)
    {
        tmp = leds[_matrixDisplay.XY16(0, y)];
        for (int m = 0; m < delta; m++)
        {
            // Do this delta time for each row... computationally expensive potentially.
            for (int x = 0; x < _matrixDisplay.VPANEL_W; x++)
            {
                leds[_matrixDisplay.XY16(x, y)] = leds[_matrixDisplay.XY16(x + 1, y)];
            }

            leds[_matrixDisplay.XY16(_matrixDisplay.VPANEL_W - 1, y)] = tmp;
        }
    }
}

so i edited the byte delta to float delta cause using byte even if i set it to 1 it would move way to fast! so to try and slow it down i made it a float and tried 0.001 as a value but does not work :S what am i missing?

fathom plover
#

Im running into a strange problem with my esp32 huzzah and 128x64 feather oled. I have code that works with my esp8266 but when switching over to the esp32 and changing the pins. My A button is acting like its being pressed. I have switched the pins for different ones. forcing me to have my oled separated from the esp32 so i can wire the buttons to different pins to make it work

inland gorge
fathom plover
#

14, 32, 15. pressed as in pin 14 or 15 on the oled is cycling in my menu. but on my eps8266 it works just fine.

inland gorge
fathom plover
#

i have already change to those pins. its working with the example. so its something with my code i think

fathom plover
safe crown
#

Hi ! I'd like to compile a custom version of TinyUF2 on ESP32. In which env should I do that ? Do I need the raw IDF from espressif, or can it be done with a customized project in like platformIO with the ESP arduino toolchain in the background ? Thanks

elder hare
#

i want to control the amount of stars that are on the matrix display at one time! that would require me to keep track of lit pixels in some sort of array? and check if that pixel has faded all the way to black THEN spawn a new star at a random location but how would this be done? 🙂 any help would be AWSOME 🙂

HEADER :

#pragma once

#include <Arduino.h>
#include "matrixdisplay.h"
#include "effects.h"

enum colorType
{
    WHITE = 0,
    MULTI = 1,
};

class NightSky
{
    public:
        MatrixDisplay& _matrixDisplay;
        NightSky(MatrixDisplay& matrixDisplay);
        ~NightSky();

        bool bEnableStars = true;
        colorType ct = MULTI;
        CHSV colorStars;
        uint8_t randomAmountStars = 64;
        uint8_t starTimer = 25;

        void stars(Effects &effects);
        void show(Effects &effects);
        void fadeStars(Effects &effects);

    private:
};

CPP:

#include <Arduino.h>
#include "nightsky.h"
#include "matrixdisplay.h"
#include "effects.h"
#include "utils.h"

NightSky::NightSky(MatrixDisplay& matrixDisplay): _matrixDisplay(matrixDisplay)
{
}

NightSky::~NightSky()
{
}

void NightSky::stars(Effects &effects)
{
    if(!bEnableStars)
        return;
    
    if (Update2(starTimer) )
    {
        int x = random(_matrixDisplay.virtualDisp->width());
        int y = random(_matrixDisplay.virtualDisp->height());

        switch (ct)
        {
        case WHITE: colorStars = CHSV(100, 0, 255); break;
        case MULTI: colorStars = CHSV(random(255), 255, 255); break;
        default: colorStars = CHSV(255, 255, 255); break;
        }

        if (random(randomAmountStars) == 1)
        {
            effects.leds[_matrixDisplay.XY(x, y+1)] += colorStars;
            effects.leds[_matrixDisplay.XY(x-1, y)] += colorStars; effects.leds[_matrixDisplay.XY(x, y)] += colorStars; effects.leds[_matrixDisplay.XY(x+1, y)] += colorStars;
            effects.leds[_matrixDisplay.XY(x, y-1)] += colorStars;
        }
        else
        {
            effects.leds[_matrixDisplay.XY(x, y)] += colorStars;
        }
    }
}

void NightSky::fadeStars(Effects &effects) {
    for (int x = 0; x < _matrixDisplay.VPANEL_W; x++)
    {
      for (int y = 0; y < _matrixDisplay.VPANEL_H; y++)
      {
        if (random(25) == 1)
        {
          effects.leds[_matrixDisplay.XY(x, y)] = effects.leds[_matrixDisplay.XY(x, y)].fadeToBlackBy(50);
        }
      }
    }
}

void NightSky::show(Effects &effects)
{
    stars(effects);
    fadeStars(effects);
    effects.ShowFrame();
}
#

keep in mind that uint8_t randomAmountStars = 64; is not "Amount of stars" it is just the number for the randomness between a big star and a 1 pixel star 🙂 (might rename it so as not to be confusing) 😛

stable forge
safe crown
#

thanks a lot @stable forge I'll see if I can setup either this in platform IO / VC + IDF or if I install a linux sub system under windows. Cheers

stark kindle
# edgy ibex I'm switching an ESP8266 feather project from Arduino to PlatformIO. Everything...

Not sure if you ever got an answer on this - yes, just use web.accept() - the warning is because the name of the method is being changed, but it's the same method. You can also leave your code as-is but a future version of the Arduino framework will drop the available() method and your code will stop building properly at that point.

You can check this out for yourself if you want - the Arduino framework is open source, so the code is online.

GitHub
Arduino/libraries/ESP8266WiFi/src/WiFiServer.cpp at master · esp826...

ESP8266 core for Arduino. Contribute to esp8266/Arduino development by creating an account on GitHub.

left mauve
#

I can't find the LED pins on the pygamer pinout

adafruit_products_Adafruit_PyGamer_Pinout.png
#

(it has 5 neopixel leds on the front)

north stream
#

They're presumably connected to pins on the MCU and not to external pins

left mauve
#

ah it's port 8 I think

#

how do I control them individually if they're only one pin

leaden walrus
#

do you mean the neopixels?

valid hazel
elder hare
#

i'm about to go mad....
Header:

#pragma once

#include <Arduino.h>
#include "matrixdisplay.h"
#include "effects.h"

enum colorType { WHITE = 0, MULTI = 1 };

class NightSky
{
    public:
        NightSky(MatrixDisplay& matrixDisplay);
        ~NightSky();

        void manageStars(Effects &effects);         // Process the starfield
        void spawnStar(Effects &effects);           // Spawns a new "popup" star when needed
        void fadeStar(Effects &effects);            // Looks in the array of lit pixels and fades them
        void show(Effects &effects);                // Shows the starfield

    private:
        MatrixDisplay& _matrixDisplay;

        bool bEnableStars = true;        // Enable or disable the starfield
        colorType ct = MULTI;            // Change the colors of the stars, white or Multi color
        CHSV colorStars;                 // Holding the colors for the stars
        uint8_t randomSizeStar = 64;     // This is for the random() function where if random(RandomSizeStar) = 1, we spawn a big star (5 pixels) if not we do a 1 pixel star
        uint8_t starTimer = 10;          // This is the update timer using millis()
        bool litPixels[64][64];          // Use appropriate dimensions
        int numStars = 0;                // Keep track of how many stars we have in our starfield
        int maxStars = 500;                // How many stars we want at any given time
        int starFadeAmount = random(5);  // Adjust fading amount as needed
};
#

CPP:

#include <Arduino.h>
#include "nightsky.h"
#include "matrixdisplay.h"
#include "effects.h"
#include "utils.h"

NightSky::NightSky(MatrixDisplay& matrixDisplay): _matrixDisplay(matrixDisplay)
{
}

NightSky::~NightSky()
{
}

void NightSky::manageStars(Effects &effects)
{
    if (!bEnableStars)
        return;
    
    if (timeToUpdateStar(starTimer) )
    {
        // Count current stars
        int currentStars = 0;
        for (int x = 0; x < _matrixDisplay.VPANEL_W; x++)
        {
            for (int y = 0; y < _matrixDisplay.VPANEL_H; y++)
            {
                CRGB currentColor = effects.leds[_matrixDisplay.XY(x, y)];
                if (currentColor.r > 0 || currentColor.g > 0 || currentColor.b > 0)
                {
                    currentStars++;
                }
            }
        }

        if (currentStars < maxStars)
        {
            // Check for faded pixels and spawn a new star there
            for (int x = 0; x < _matrixDisplay.VPANEL_W; x++)
            {
                for (int y = 0; y < _matrixDisplay.VPANEL_H; y++)
                {
                    CRGB currentColor = effects.leds[_matrixDisplay.XY(x, y)];
                    if (currentColor.r == 0 && currentColor.g == 0 && currentColor.b == 0 && currentStars < maxStars)
                    {
                        spawnStar(effects);
                        currentStars++;
                    }
                }
            }
        }
    }
}

void NightSky::spawnStar(Effects &effects)
{
    int x = random(_matrixDisplay.virtualDisp->width());
    int y = random(_matrixDisplay.virtualDisp->height());

    switch (ct)
    {
    case WHITE: colorStars = CHSV(100, 0, 255); break;
    case MULTI: colorStars = CHSV(random(255), 255, 255); break;
    default: colorStars = CHSV(255, 255, 255); break;
    }

    if (random(randomSizeStar) == 1)
    {
        effects.leds[_matrixDisplay.XY(x, y+1)] += colorStars;
        effects.leds[_matrixDisplay.XY(x-1, y)] += colorStars; effects.leds[_matrixDisplay.XY(x, y)] += colorStars; effects.leds[_matrixDisplay.XY(x+1, y)] += colorStars;
        effects.leds[_matrixDisplay.XY(x, y-1)] += colorStars;
    }
    else
    {
        effects.leds[_matrixDisplay.XY(x, y)] += colorStars;

    }
}

void NightSky::fadeStar(Effects &effects)
{
    // Loop through all the pixels and randomly reduce their brightness
    for (int x = 0; x < _matrixDisplay.VPANEL_W; x++)
    {
        for (int y = 0; y < _matrixDisplay.VPANEL_H; y++)
        {
            CRGB currentColor = effects.leds[_matrixDisplay.XY(x, y)];
            // Randomly reduce the brightness of each non-black pixel
            if (currentColor.r > 0 || currentColor.g > 0 || currentColor.b > 0)
            {
                effects.leds[_matrixDisplay.XY(x, y)] = currentColor.fadeToBlackBy(starFadeAmount);
            }
        }
    }
}

void NightSky::show(Effects &effects)
{
    manageStars(effects);
    fadeStar(effects);
    effects.ShowFrame();
}
#

So here is my problem! when i run this the program just "in your face" BAM 500 stars on the matrix instantly... how can i controll it and "spawn" them softly

frail pawn
#

I cant check your code cos im on my phone and i will give myself a migraine but my first guess would be do you have any sort of delay in there or is it running as fast as it possible can?

elder hare
north stream
#

I'm guessing a problem with timeToUpdateStar(), maybe it's not being updated when a star is created.

elder hare
odd fjord
north stream
#

I like to precompute the turnover value instead of doing the subtraction every time: ```arduino
static unsigned long next;

unsigned long now = millis();

if (now > next) {
// do update stuff
next = now + INCREMENTINTERVAL;
}

elder hare
elder hare
gloomy sandal
#

Hey,
I'm using an Arduino Nano to read a PWM signal. However, whenever the signal reaches values of 0 or 255, the Arduino crashes. It's critical for the Arduino to remain operational as it transmits the read PWM signal via I2C to another microcontroller. Does anyone have a solution to prevent the Arduino from crashing under these conditions?

north stream
elder hare
#

figured 🙂

#

i got it to work tho! 😄

north stream
elder hare
#

and the second thing i made was this

bool NightSky::hasNeighborStar(int x, int y, Effects &effects) {
    // Check if there's a star in any neighboring positions
    for (int dx = -radiusBetweenNeighbors; dx <= radiusBetweenNeighbors; ++dx) {
        for (int dy = -radiusBetweenNeighbors; dy <= radiusBetweenNeighbors; ++dy) {
            int neighborX = x + dx;
            int neighborY = y + dy;

            // Ensure the neighbor position is within bounds
            if (neighborX >= 0 && neighborX < _matrixDisplay.VPANEL_W &&
                neighborY >= 0 && neighborY < _matrixDisplay.VPANEL_H) {
                CRGB neighborColor = effects.leds[_matrixDisplay.XY(neighborX, neighborY)];
                
                // Check if the neighbor pixel is not completely dark (considered as lit)
                if (neighborColor.r > 0 || neighborColor.g > 0 || neighborColor.b > 0) {
                    return true; // Neighbor star found
                }
            }
        }
    }
    return false; // No neighbor star
}

it was super annoying that if i had "maxStars = 500" on my 64x64 matrix display it would sometimes spawn a new star ontop of a star that hadn't faded 100% out + spawning stars close to each other! now they are perfectly spaced (all be it totaly random) ❤️ beautiful to watch i might add! 😄

sudden quarry
#

hi all, have anyone worked on myoware 2.0 EMG sensor? I am not able to get the exact electrode pads position/location. I am getting random values.

18977-MyoWare_2.0_Muscle_Sensor-01.jpg
north stream
#

I think they read voltage, not position?

inner seal
#

Hi i'm trying to set up an adafruit voice bonnet on a raspberry pi 4 B and following the guide, however when i try to do the “Blinka setup” i get the error “externally-managed-environment” message when i try to use the command "sudo pip3 install --upgrade adafruit-python-shell". Does anyone know how to fix this?
https://learn.adafruit.com/adafruit-voice-bonnet/blinka-setup

Adafruit Learning System
Adafruit Voice Bonnet

Give your Raspberry Pi two microphones and speakers!

stable forge
north stream
#

My usual approach these days is to start off by creating my own virtual environment and then installing everything into that. One of the advantages is sidestepping "externally managed" issues as it's now my own environment, and I manage it.

inner seal
rain kindle
#

Hi all! couple quick questions for a project I am working on and could do with some advice - does anyone have any experience with shiftr.io?

(this is related to this question regarding adafruit.io: #help-with-wippersnapper-and-adafruitio message)

I am trying to get my MKR NB 1500 to connect to a cloud IoT Backend - I would like to use Adafruit.io but have not quite got my head around getting an LTE-M Client working that the Adafruit (or Arduino) MQTT Library can then use..

When i look into the Arduino MQTT Docs there is an example for NB1500 using the shiftr.io backend (https://github.com/256dpi/arduino-mqtt/blob/master/examples/ArduinoMKRNB1500/ArduinoMKRNB1500.ino)

unborn thunder
#

I am running into an issue with RP2040 and CAN.

I am using an MCP2515 with an RP2040, and I am trying to take all of the CAN messages on the bus and store it in a map.

However, basically no matter what I do, I cannot get it to run fast enough to process over 1500 messages/sec. I don't really think that is a lot of messages, and I know slower mcus that are able to process all of that.

I first tried interrupt driven events (when rx buffer is full the MCP2515 triggers an interrupt). That works well for under under 1500 messages/sec but it doesn't work past that and will lock up (interrupts stop triggering, code freezes) if you go over that (my goal is 5000 messages/sec based on a sample CAN log I have).

The only way I get it to work is if I basically do a while(true) on core1 where I do nothing but read messages from the MCP2515, but then the hashmap resource is basically continuously locked up and I cannot get any messages out of it.

My next step is using SPI DMA but I'm not really sure I will get too much of a speedup for a 1 byte status frame and maybe a 10 byte message read. What do you all think?

edgy ibex
# elder hare So here is my problem! when i run this the program just "in your face" *BAM* 500...

Throwing my $0.02 into the ring, I would say it's probably because of the if (currentStars < maxStars) test, which means it'll spawn a star on each iteration. If you're iterating really quickly, then yes it'll fill up that fast.
I'd attack this by creating a new variable currentMaxStars, using that in the test, and then having that slowly climb from some starting count up to maxStars over a few seconds, or however long you want to take to populate the stars.

#

Maybe add a method

void nightSky::AllowMoreStars(uint32_t increment)
{
    uint32_t const newMaxStars = currentMaxStars + increment;
    currentMaxStars = std::min(newMaxStars, maxStars);
}

And call that from time to time from loop() to add a few more stars.

celest elm
#

Is there a C implem of adafruit_ov5640 for arduino?

vale mason
#

Is there a way to make the equivalent of TON (timer on delay) in arduino IDE i tried millis() but it has its own disadvantages any help?

elder hare
#

working with the AnimatedGIF lib with ESP32-HUB75-MatrixPanel-I2S-DMA

Header:

#pragma once

#include <Arduino.h>

#define FASTLED_INTERNAL

#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include "Wire.h"

#include <AnimatedGIF.h>
#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
#include "matrixdisplay.h"

#define NFC_SCLK 33
#define NFC_MISO 32
#define NFC_MOSI 21
#define NFC_SS 22

class GIFDisplay
{
public:
    GIFDisplay(MatrixDisplay& matrixDisplay);
    ~GIFDisplay();

    AnimatedGIF gif;
    File FSGifFile;
    File GifRootFolder;
    SPIClass spi = SPIClass(HSPI);
    uint8_t x_offset, y_offset;
    uint8_t _GifSelected = 3;
    uint8_t _CurrentGif = 3;
    uint8_t _Temp_Brightness = 255;

    void GIFDraw(GIFDRAW *pDraw);
    void *GIFOpenFile(const char *fname, int32_t *pSize);
    void GIFCloseFile(void *pHandle);
    int32_t GIFReadFile(GIFFILE *pFile, uint8_t *pBuf, int32_t iLen);
    int32_t GIFSeekFile(GIFFILE *pFile, int32_t iPosition);
    void freeBuffer(GIF_FREE_CALLBACK *pfnFree);
    void showGIF(char *name);
    void begin();
    void loop();

private:
    MatrixDisplay& _matrixDisplay;
};
#

CPP:

void GIFDisplay::showGIF(char *name)
{
    if (gif.open(name, GIFOpenFile, GIFCloseFile, GIFReadFile, GIFSeekFile, GIFDraw))
    {
        x_offset = (_matrixDisplay.VPANEL_W - gif.getCanvasWidth()) / 2;
        if (x_offset < 0)
            x_offset = 0;
        y_offset = (_matrixDisplay.VPANEL_H - gif.getCanvasHeight()) / 2;
        if (y_offset < 0)
            y_offset = 0;

        while (gif.playFrame(true, NULL))
        {
            if (_CurrentGif != _GifSelected)
            {
                Serial.printf("GIF WAS STOPPED! \n");
                Serial.printf("GIF WAS CHANGED TO %d \n\n", _GifSelected);
                _CurrentGif = _GifSelected;
                break;
            }
        }
        gif.close();
    }
}

Error:

src/GIFDisplay.cpp: In member function 'void GIFDisplay::showGIF(char*)':
src/GIFDisplay.cpp:154:84: error: invalid use of non-static member function 'void* GIFDisplay::GIFOpenFile(const char*, int32_t*)'
     if (gif.open(name, GIFOpenFile, GIFCloseFile, GIFReadFile, GIFSeekFile, GIFDraw))
                                                                                    ^
lilac ginkgo
#

total guessing at this point: maybe the static here means "do not modify the GIF"(you are only meant to read but not write it), but the func isn't matching the expectation?

or maybe you just need void ... to become static void ... 🙃

#

is this one of those "CPP error messages are confusing" scenarios? part of the error seems to be pointing at GIFDraw while the other half yells at GIFOpenFile 😅

elder hare
#

yea it is the "confusing" one.... and i hate them

#

from the source code

lilac ginkgo
#

and those CALLBACK things are, im assuming, something liketypedef void (* CALLBACK)(char *, ...); (or however you write that on CPP)

#

i'd start by double-checkinf that your function signatures match with those (apparently they dont)

elder hare
lilac ginkgo
#

next time send text please, easier to work with (:

#

both Draw and Open match as far as i can tell, funny...

#

time to wait for somebody with actual knowledge to chime in 😛

elder hare
#

yea

tardy iron
#

@elder hare could you give some pointers to the specific code you're using (GitHub, etc)?

#

but yeah, non-static member functions can't generally be used as callbacks in C++

stable forge
#

@elder hare the automod deleting posts is due to a kind of silly match on a Russian vulgarity. I will fix that

tardy iron
elder hare
tardy iron
#

i think static member functions will also work as callbacks (because they don't take the hidden this argument, which the caller of the callback won't provide)

digital spindle
#

Hello, I'm trying to display battery information on a small oled. I'm using a MAX17048 fuel gauge, but my values are coming in long strings for some reason. Batt Voltage: 335544.312 V
Batt Percent: 16777216.0 %. Any ideas on how to get these values trimmed down?

image.png
stark kindle
# lilac ginkgo total guessing at this point: maybe the `static` here means "do not modify the G...

In this case static means a class-level function rather than a method that operates on an instance of the class. const would mean don't modify the thing. C++ overloaded the meaning of static from merely indicating scoping, in a slightly confusing way (const gets its meaning weirdly overloaded too).

Folks getting caught on trying to use methods as callbacks happens a lot.

Sometimes you can use a C++ lambda expression to create a function binding the method to the instance but then you may end up dealing with the difference between C++ functions and C++ functors and will start regretting your life choices.

lilac ginkgo
stark kindle
lilac ginkgo
#

curious to know what's the equivalent to @staticmethod now hahaha

#

ie: only in the class scope, but nothing to do with it

stark kindle
#

I'm not enough of a pythonista here, I'm going to go find out 🙂

tardy iron
lilac ginkgo
#

yeah, that makes a little more sense, maybe C++ does not have a concept of class-level values... such that a "classmethod" and "staticmethod" would effectively be the same?
(i mean: classes/methods being syntax sugar on top of "regular" structs, and not really having a concept of "common stuff" in a class, you just have instances of it and the namespace)

tardy iron
#

i'm not sure C++ has a concept of a type as a first-class object in the same way that Python does

stark kindle
#

C++ does have class variables - another use of static

class Thing {
  public:
    static int i;
}
lilac ginkgo
stark kindle
#

yup

#

I believe it could be private as well, in which case static class functions could still see it

#

I'm at my limit here with C++'ness though and could easily be wrong

lilac ginkgo
#

in that scenario i can see some usecases for supporting both static and class methods, but maybe they dont exist even then (:

#

i always find it very interesting to see how diff languages handle some stuff

stark kindle
#

Agreed, it's fascinating and sometimes frustrating. Also when languages have features for convenience and readability that lead to folks writing code that's inconvenient and unintelligible with a PhD in whatever language it's in 🙂

digital spindle
# lilac ginkgo no code = nothing we can try and fix/debug

This is what I'm using to print the values to the display.

display.print("Battery: ");
display.print(maxlipo.cellVoltage(), 3);
display.println(" V");

display.print("Percent: ");
display.print(maxlipo.cellPercent(), 1);
display.println(" %");

I can share the whole sketch, should I paste it in here, or upload as a file?

stark kindle
# lilac ginkgo i always find it very interesting to see how diff languages handle some stuff

and @tardy iron

So this works as expected (mostly):

#include <stdio.h>

class Thing {
private:
  static int value;

public:
  Thing(int arg) { Thing::value = arg; }

  static void do_something() { printf("%d\n", Thing::value*2); }
};

int Thing::value = 3;

int main(int argc, char **argv) {
  Thing foo(5);

  Thing::do_something();
}

outputs 10 (more importantly, compiles). So a static class function can see a private static class variable. Which if I understand the Python version of all this well enough makes me think C++ static class methods are more like "classmethod" than "staticmethod" (not arguing it, just seeking clarity)

I was surprised to find that I had to include the int Thing::value line or else no storage was allocated for value, which seemed counterintuitive.

I did some digging into this and some of the more esoteric static/const/constexpr stuff and decided I'd rather do something else with my day 😉

lilac ginkgo
#

Does that work fine if you input something like 100 instead of a function call? (ie confirming that print works as expected)

digital spindle
#

if i run that example by it's self on an uno r3, it shows values normally. It's after the merge I'm getting these odd long values.

leaden ruin
#

Is there an EYESPI shield?

zealous crow
#

Quick question -- I uploaded a sketch to my Feather m0 express, but it seems to hose the device and I cannot seem to upload a different sketch to replace it -- is there a way to reset or not have it autorun the sketch while plugged into the IDE? I have to run to the post office now but will check when I am back.

charred salmon
#

Typically with Adafruit's boards if you double click the reset button you can force the board into bootloader mode. Assuming you haven't done something that destroys the bootloader code (you typically need to go out of your way to do this, and would know that you did) you should be able to upload again from there. You may need to pick a different COM port though.

zealous crow
#

Cool thank you @charred salmon that did the trick.

lucid jackal
#

hey could someone help me out here

#

i got an esp32 s2 and im having trouble programming it

#

is there something i forgor to dowload or idk

frail pawn
#

you need to give a bit more explanation of whats wrong, are you getting errors or?

lucid jackal
#

i connect the board to com 7, upload example code to the board and it says its finised uplaoding but it just doesnt run

#

its really strange

frail pawn
#

what board is it

lucid jackal
#

ive worked with similar boards but this one is new to me

#

esp32 s2

#

qt pyy

#

Adafruit QT Py ESP32-S2 WiFi Dev Board with STEMMA QT this exact one <<

frail pawn
#

try clicking the reset switch and see if your code starts running?

lucid jackal
#

already tried

#

i had a serial print that would run if it didnt correctly initialize the accelorometer and when i disconnected the sensor it ran that part

#

im so confused

frail pawn
#

is it possible it IS running your code, but your code is wrong

#

try uploading an example code

lucid jackal
#

thats what i did

#

and its not working lo

#

lol*

frail pawn
#

screenshot what the arduino IDE says when you are done uploading?

lucid jackal
#

ok one sec

#

nothin in serial monitor

frail pawn
#

yeah looks fine, that suggests it may be a code problem or something up with your physical setup

lucid jackal
#

im testing out the gps now as an exmaple

#

its connect with the quick connector and is lighting up

frail pawn
#

just for the sake of checking,

#

Serial.println("Waiting for serial");

#

put that before "while (!serial)

lucid jackal
#

ok one sec

#

weird its not showing anything either

#

wat u think that could be

frail pawn
#

I think the code is hanging waiting for serial connection tbh, you could try running an example that doesnt use anything fancy, just the blink example or w/e

lucid jackal
#

ok

zealous crow
#

I think I know -- I worked with this one last week @lucid jackal it doesn't have native USB file system support

#

I flashed it with the adafruit circuitpython bin using esptool and then you can edit/view the files with thonny.

#

Unless you are already past that part

#

oh nevermind, arudino -- duh

#

I actually have an arduino question regarding the feather m0 -- I have interupt working, but I'd like to put the device to sleep and wake it up on interupt but I cannot figure out that part.

zealous crow
#

I finally got it worked out

zealous crow
#

This is a reduced example of using an ADXL on A5 which is Int2 -- part of how I got it to work was using the registers directly and I think I just enabled waking on all interupts since I spent a couple hours trying to figure it out waking on just Int 2 without avail, but this works:

📎 message.txt
sacred lake
#

Let's say I have an arduino nano and need more analog I/O pins, is there some sort of I/O expansion board or do I have to use some sort of I²C?

safe shell
#

@sacred lake PWM, ADC, and / or DAC?

true bane
#

I am having issues setting up Bluetooth with the FLORA
End goal is to use the BlueFruit app to command the neopixels
But it tells me that a custom sketch is required and I don't know what that means

So I went back to the basics tutorials, with atcommand.
I run the example code, but it errors out at the factory reset

-------------------------------------
Initialising the Bluefruit LE module: OK!
Performing a factory reset: 
AT+FACTORYRESET

<- Couldn't factory reset```

 So I went to the factory reset example to see if I could find the issue but

```Adafruit Factory Reset Example
------------------------------------------------
Initialising the Bluefruit LE module: OK!
Performing a factory reset: 
AT+FACTORYRESET

<- Couldn't factory reset```

OK. So I change the '#define FACTORYRESET_ENABLE      0` line on atcommand and try again

I get this tomfoolery
```Adafruit Bluefruit AT Command Example
-------------------------------------
Initialising the Bluefruit LE module: OK!
ATE=0

<- Requesting Bluefruit info:
----------------
----------------
AT > ATI


<- AT > AT+HELP


<- AT > ```

What am I missing homies
north stream
#

Power issue? Baud rate issue? Line terminator issue? Not much to go on here.

true bane
#

Baudrate is set to 115200 per the tutorial, don't know anything about the line terminator issue, and far as I can tell everything is wired correctly

IMG_20231231_120242691_HDR2.jpg
#

I just started with arduino yesterday so I don't even know what I don't know

north stream
#

Note there are two baud rates: one from the computer to the MCU, and another from the MCU to the Bluetooth module.

#

I vaguely remember they have a sketch that's just a passthrough, so you can type stuff on the computer and it just forwards it to the Bluetooth module and sends back the reply. It might be worth loading that up and trying a few basic commands just to see if the module is replying. There ought to be a few basic AT command where it will give a reply (even if that reply is just "OK")

true bane
#

The atcommand example has these lines in the setup

delay(500);

Serial.begin(115200);
Serial.println(F("Adafruit Bluefruit AT Command Example"));
Serial.println(F("-------------------------------------"));```

and I have the serial monitor set to the 115200
#

It looks like these tutorials are from 2015, and there have been some changes to the examples since then. Are there any updated guides around?

north stream
#

That would be the link between the MCU and the host computer. There would presumably be another link from the MCU to the Bluetooth module

#

Unfortunately I don't know if there are any updated guides.

true bane
#

I don't see any other references in the examples, how would I check this?
Should I post the .ino and config here?

true bane
#

Here is what I have so far, and the serial output i get is

14:26:10.071 -> --------------------------------
14:26:10.071 -> 
14:26:10.071 -> Please connect using the Bluefruit Connect LE application
14:26:10.071 -> Initialising the Bluefruit LE module: OK!
14:26:11.089 -> ATE=0
14:26:11.089 -> 
14:26:11.089 -> <- ```

It is getting stuck on line 157 I think 
```  while (! ble.isConnected()) {
      delay(500);
  }```

Edit: I found in the example code where the debugging for ble was turned off, turned it back on and now it spams
 ```15:46:31.138 -> AT+GAPGETCONN
15:46:31.138 -> 
15:46:31.138 -> <-```
📎 BluefruitConfig.txt 📎 neopixel.txt
peak badge
#

rp2040 PIO: having some trouble understanding the difference between individual statemachines and individual PIO's. Can i use two seperate statemachines to run two seperate interfaces(E.g. i2c and spi) in only one pio module, saving the second for something else?

edgy ibex
# peak badge rp2040 PIO: having some trouble understanding the difference between individual ...

As far as I can tell, all four state machines in a single PIO "block" are independent. They should all be able to run different programs. So in one block you could use one for I2C, another for SPI and still have two spare state machines. And that's not even looking at the second block.
Having only ever used one state machine at a time myself, the one thing I'd check for is whether there's any clocking interdependencies between state machines. I doubt there is, but it would be wise to check.

lethal yarrow
edgy ibex
#

Although whether you could fit both an I2C and and SPI state machine into the 32 words of instruction memory is n open question.

peak badge
lime minnow
#

does anyone know why some lcds have different pin names? I keep seeing different layouts, and I don't know if my display will still work in certain prjects

#

it goes: VCC, GND, DIN, CLK, CS, DC, RST, BL

#

but I usually see: GND, VCC, SCL, SDA, RES, DC, BLK

stark kindle
# lime minnow does anyone know why some lcds have different pin names? I keep seeing different...

There's no standardization in pinouts. Companies like Adafruit are pretty good about keeping pinouts as similar as possible across products but lots of other companies don't bother, and there are no standards that companies follow.

In the case you mentioned, it sounds like the first one is likely an SPI device (DIN, CLK, CS, DC tend to imply SPI) whereas the second is an I2C device (SCL, SDA tend to imply I2C though I have no idea what DC would mean in this case). Those are two different kinds of hardware interconnects that aren't compatible with one another. That said, some companies don't even use pin names consistently.

lime minnow
#

now I need to hunt down a I2C display

lethal yarrow
#

DC might be the backlight power supply.

rough torrent
#

I've used (cheap) SPI displays that have SCL and SDA represent CLK and DIN - it's weird

inland gorge
#

If you've got a "DC" pin, it's an SPI display (or 8-bit parallel, but that'd be more obvious)

stark kindle
stark kindle
stark kindle
charred salmon
scarlet wagon
#

Is there a pins.arduino.h (or some equivalent) for the QY_PY_ESP32-S3? Something to make pin naming a little more readable?

odd fjord
#

there are 2 adafruit_qtpy_esp32s3 boards

viscid trail
#

Hoi, for screens, what does 7 pin benefit over 4 pin for screens?

image.png
scarlet wagon
odd fjord
#

The STEMMA QT connector IO pins in Arduino are 40 (SCL1) and 41 (SDA1) and are available on Wire1

inland gorge
viscid trail
#

Alrright. What's the "fps" the I2C can do? Like can it do "high fps pixel animatons"?

#

As i'm currently preparing to print a macroboard box for the atmega arduino for up to 16 keys, or if this one can only do 14 keys, leave rest for the screen.

https://vi.aliexpress.com/item/1348800135.html? this is what i will use. The usb C variant

inland gorge
# viscid trail Alrright. What's the "fps" the I2C can do? Like can it do "high fps pixel animat...

not really. maybe for small monochrome OLED. If you want high framerate, you should defnitely be looking at SPI displays. And while an older Arduino like you link could perhaps get around 10 fps on a color screen, you should really be looking at an ARM-based board (which can still use the Arduino IDE), using chips like SAMD21, RP2040, or ESP32. Those have high-speed SPI and have enough CPU power to calculate the graphics

viscid trail
inland gorge
viscid trail
#

holy crap he spoke fast. Need to set video to half speed lol

scarlet wagon
# odd fjord from <https://learn.adafruit.com/adafruit-qt-py-esp32-s3/pinouts>

Thanks - this is where I started the journey and would appreciate insight: I couldn't find where Wire1 was defined. It doesn't seem to be defined in the 'pinouts' file you linked, which cross references to TwoWire::initPins. Unfortunately when I lookup TwoWire on github it has no initPins, nor does Wire1 appear in the library (that I found). So basically I wind up having to enter the pin numbers manually, which isn't very portable. Is there a canonical way to do this portably?

odd fjord
scarlet wagon
fathom plover
#

I'm having a odd problem with my esp32 feather board and my feather oled. It gives me this error. But it was working before.

Connecting....
Chip is ESP32-D0WD-V3 (revision v3.0)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 40:22:d8:f4:20:ec
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Configuring flash size...
Flash will be erased from 0x00001000 to 0x00005fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000e000 to 0x0000ffff...
Flash will be erased from 0x00010000 to 0x0004bfff...
Compressed 17568 bytes to 12204...

A fatal error occurred: Packet content transfer stopped (received 8 bytes)
Failed uploading: uploading error: exit status 2

stark kindle
fathom plover
stark kindle
fathom plover
fathom plover
ashen star
#

Is it possible to disable the on LED on the Circuit Playground Classic? I couldn't find a programmatic way to turn it off on Google

junior berry
#

Did you run it on Arduino or VSCode ??

river yacht
#

Yeah I did actually! @junior berry

iron harbor
#

Hey guys I’m pretty new to using my arduino and stuff. I was wondering how I should go about making a thermal camera project that I found online. Like should I use Eagle for the circuit of the design and like 3D print the camera outside? I’m honestly new to 3D printing as well. If anyone could give me any pointers I would really appreciate it.

odd fjord
iron harbor
#

Sorry about that

#

Just wasn’t sure where to send it

odd fjord
#

No problem -- Usually it is best to pick what you think is the best channel. Then be patient...

junior berry
# river yacht Yeah I did actually! <@1051576656445317150>

Did you use framework = espidf or arduino? I did and Arduino project with RGB666 in Arduino IDE 2.xxx It worked but too heavy with the library. I don't want it. I've found a code written in C and PlatformIO , I could compile it but it did not run properly. I did some post on PlatformIO comunity but no reply still, I'm looking for a help

river yacht
#

@junior berry Please forgive me, I'm still pretty new at this. I did get it to work using the libraries as described in the adafruit documentation. I do all my development in vscode and compile in arduino ide.

#

sorry arduino cli

viscid trail
thorn thistle
#

I'm trying to write the Blink Arduino sketch to my Feather RP2040 DVI and I get the following message: Exception executing udisksctl. Exception: [Errno 2] No such file or directory: 'udisksctl'

#

any suggestions?

north stream
lilac ginkgo
# viscid trail Hoi, which macro board firmware is recommended? https://www.makerluis.com/makin...

for completeness: both VIA and VIAL are extra layers on top of QMK for editing stuff on the go (without recompiling/flashing), using (at least for the most part) a GUI software on the computer

  • both of them only offer a sub-set of options, for full control you'd use code
  • VIA has a smaller set of functionality than VIAL, but it is part of the QMK codebase (ie: they are up to date)
  • on the other hand, VIAL has more aggressive changes to the "core" code and their forks tends to be a few months out of date (ie: missing bugfixes or new features)
    anyway, all 3 projects have their own discord servers which would be better suited for the question

other options could be KMK(uses CircuitPython) or ZMK(mainly focus on wireless).

as with anything, there is no"best" alternative, but the one that suits you best, and thus nobody can recommend on that 😉

viscid trail
lilac ginkgo
#

QMK is not Arduino.

viscid trail
#

Gotchu. Trying to learn what is actually what and what needed to add X to the device and such :P As i'm not familiar with any of this yet, i might throw a bunch of questions :P

thorn thistle
thorn thistle
#

At one point there is a message "converting to UF2" Is there a way to get it to put that uf2 on my harddisk so I can drag it onto the device myself?

elder hare
#

does anyone know if WLED supports HUB75 matrix?

runic quarry
#

I rarely code in C++ any more but needed to this weekend. I just noticed (using the Arduino IDE and whatever version of C++ compiler it has) that I don't seemt to have to forward-declare a function. Is that something new in C++? I have a function uint16_t computeCRC(const uint8_t* inData, uint16_t inLength) defined after where I call it, and the compiler doesn’t mind. I tried googling about this, but couldn't find anything other than explanations of what a forward declaration is.

stark kindle
# elder hare does anyone know if WLED supports HUB75 matrix?

I've not seen any kind of support for them. WLEDs primary focus is driving addressable LEDs like WS2812s (though it does support other kinds of LEDs), and HUB75 devices work differently and have very different hardware requirements. I think it's possible WLED could be adapted to support them but I don't believe it does right now.

You're probably better off looking at Adafruit's Protomatter or other HUB75-specific projects.

muted gyro
runic quarry
muted gyro
#

As far as I know, the Arduino IDE does some pre-processing to just add the forward-declaration for you

runic quarry
#

I see, thank you. That explains it. Not sure they should do that but oh well

muted gyro
#

yeah, I think that feature is kinda controversial 😄

stark kindle
#

Yeah I’d say so 🙂

runic quarry
#

😆

charred salmon
#

Sometimes it will forward declare stuff.
I didn't even know it was a thing until I ran into some problem where the compiler whined endlessly until I moved a function declaration above where I used it even though I had done similar other times already.

#

Actually it'll probably usually forward declare stuff, and I just managed to find a case where it randomly didn't.

rich coral
#

can you use a J-Link clone to flash blackmagic probe to a ST-LINK v2?

stable forge
storm sigil
rich coral
tardy iron
#

in theory, i think some ST-LINKs use a MCU that has a ROM bootloader that can be accessed via USART. though i don't know if they all make those pins accessible

rich coral
#

Isn't the second ST-LINK is just used as SWD interface, so can J-LINK or even a samd21 do it?

agile palm
#

Hello,

I recently bought many 2050 LCD with integrated Touchscreen, they all works great with an Arduino Mega 2560.

I bought an Arduino Giga R1 because SPI speed of the MEGA 2560 is really too slow.

So I use the ILI9341_GIGA_n Library for the screen and it work well.

But i can't use the touchscreen with the adafruit touchscreen library, the card always read the same value from the touchscreen and don't detect any push on it.

I’m sure it’s not a connection problem with the card.

I tried the STM32 Arduino core and it's not working to... I've got plenty of error messages about missing files...

Do you have any solution or working library to solve this problem ?

Best regards.

stable forge
# agile palm Hello, I recently bought many 2050 LCD with integrated Touchscreen, they all...

The 2050 uses analog reads to read the resistive touchscreen values. So something is going wrong with those reads. I'd check the wiring very carefully, and make sure that the pins you think are being read are the ones actually being used. Also check that the analogRead range is the same, or set the solution as needed. E.g. maybe this is a manifestation of https://github.com/adafruit/Adafruit_TouchScreen/issues/39 ?

#

you could test the analog pins you are using manually with a potentiometer and a test program

agile palm
#

Hello, pins i'm using are the good ones. I can read values from a potentiometer correctly.

#

I think i'm gonna try to configure the ADC on 10 bits reading in a first time. i'm asking myself if it's not a problem of applied voltage on ADC (on a MEGA 2560 ADC can handle 5V, i'm pretty sure it's 3.3V on a giga r1...)

stable forge
quick maple
agile palm
#

I'm trying with this code : analogReadResolution(10);

 TSPoint p = ts.getPoint();

if (p.z < MINPRESSURE || p.z > MAXPRESSURE) //si la pression est supérieure à la tempo minpressure et inférieure à maxpressure, retour de l'information avec l'appel à la fonction return
{
return;
}

// Scale from ~0->1000 to tft.width using the calibration #'s
p.x = map(p.x, TS_MINX, TS_MAXX, 0, tft.height()); //vient chercher la position de x avec la calibration de la valeur TS_MINX, TS_Maxx, la première valeur est 0 la dernière valeur possible est la largeur de l'écran défini par la fonciton tft.width().
p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.width());

Serial.print("X = "); Serial.print(p.x);
Serial.print("\tY = "); Serial.print(p.y);
Serial.print("\tPressure = "); Serial.println(p.z);

#

but it's not reading anything... it's stay stuck, expect if i delete :: if (p.z < MINPRESSURE || p.z > MAXPRESSURE) //si la pression est supérieure à la tempo minpressure et inférieure à maxpressure, retour de l'information avec l'appel à la fonction return
{
return;
}

stable forge
#

whhat values are printed for X= and Y= ?

agile palm
#

in this case i'm just reading X = 335 Y = 464 Pressure = 0

stable forge
#

you can format code in here using triple accents grave. See #welcome