#help-with-arduino

1 messages · Page 105 of 1

pine bramble
#

this is the output I want previous value to give -7.92 not -7.76

unknown.png
#

basically what I want to do with this code is convert the acceleration to velocity using the equation of motion

#

V = Vo + at
V = Velocity
Vo = Velocity previous value
a = acceleration
t = time
btw this is for a car project I made a simple data logging pcb with a bmi088 and samd21 with a flash chip and sd card to log the acceleration and velocity data to give a rough overview of the speed the car travelled at. so that is why I've been asking question related to this software is not really my forte. just wanted to let u know for transperency

livid osprey
#

Haha, that output is correct. If you add an extra Serial.println("--------"); to your loop(), you'll see what each variable is in each loop more clearly...

pine bramble
#

🤦‍♂️ how did I not realize that lol

#

thanks a lot hem!!

#

ur a genius

livid osprey
#

I only realized because I've made the same mistake before haha

pine bramble
#

😆

lapis meteor
#

How am I supposed to connect this, those holes have no end? Should I be using pin header for it?

IMG20220126203618.jpg
pine bramble
#

That's probably a 16x2 LCD.

#

There's usually 14 pins for a monochrome and a few more for color iirc.

lapis meteor
#

Oh so will I be attaching those pins with pin header to connect it to breadboard?

#

And is soldering necessary?

livid osprey
#

If you're using a breadboard, a pin header would be ideal.

lapis meteor
#

What if I do without soldering

pine bramble
#

I've wedged pin headers.

#

Makes a 'V' shape against perfboard.

lapis meteor
#

Hmmmm

pine bramble
#

The bottom tier (the perfboard) spacing is narrower to affect a wedge.

#

Just by one row. ;)

livid osprey
#

I've taken thin wires and kinda looped them through and twisted them to secure in place. It does require you use some sort of insulation to prevent shorts, though, so doing that many pins is kind of a hassle

lapis meteor
#

So it means I can use lcd on breadboard without soldering?

pine bramble
#

I've pressed an RPi Pico RP2040 onto a breadboard directly using the same idea.

#

My guess is it would slip more since you can't fold any pins over like you can using perfboard.

lapis meteor
#

Slip?

pine bramble
#

Yeah the wedge wants to back out essentially.

lapis meteor
#

Oh

pine bramble
#

Once it's pressed in I fold at least one pin over on each side to prevent backslipping.

lapis meteor
#

k I will try

pine bramble
#

;)

#

The entire idea is dependent on the header pins making a press-fit contact with plated thru-holes of a PCB

lapis meteor
#

Is there a way other than header pins

pine bramble
#

There's not a lot of pressure available to ensure good contact with most methods people have tried.

lapis meteor
#

Oh

pine bramble
#

You can buy a pre-soldered module from vendors, sometimes.

lapis meteor
#

I see

median mica
#

Has anyone used a trinket M0 as a keyboard and mouse using Arduino? I’m trying to make a two button device where one button acts a SPACE and the other button acts as a LEFT MOUSE CLICK.
I know I can do this in Circuitpython but I run out of space on the bare bones trinket M0 running CP.

cold silo
#

I have not, but I suspect it would work well.

#

I have a question regarding the RP2040 (feather). Incidentally I am also building an HID (keyboard) but that's not too relevant. I tried with python because setup was so easy but Python feels weird to me and I really wanted to use C(++), and I'm wondering what people's thoughts are on using the unofficial Arduino support because I can't for the life of me get it to run C based on the official documentation, particularly on a Windows machine. Alternatively, has anyone gotten a good flow for using it with C sans Arduino like in the official docs except on a Windows machine?

pine bramble
median mica
#

Thanks @pine bramble I knew I read a guide on it somewhere.

pallid grail
pine bramble
#

how do I tell if my arduino uno rev1 I think or mega 2560 is more suitable for a project?

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so that I only use the minimum needed microcontroller so I don't overpay for my use

pallid grail
#

@leaden walrus I'm back for more. This time it's something other than pins though. Sort of. I'm updating the pins for a few boards in the Philhower core. Three boards that have NeoPixels do not have the NeoPixel pins defined. How do I test whether I did it right? I mean, I can compare it to the PrettyPins, which is where I got the info, but I would like to know it's accurate. I'm not sure how to test Arduino changes like that. I have a fork, and I have the updated code locally.

leaden walrus
#

hmm...actually...good question. lemme think.

#

testing core changes is a bit diffy

pallid grail
#

Right? It's not as easy as dumping it into a folder and uploading a sketch.

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Ok, at least I'm not missing something obvious.

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I'll double check my work against the diagrams, and call it good.

leaden walrus
#

correct. since the BSP install does "stuff"

pallid grail
#

Right.

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And doesn't pull directly from GitHub either. So I can't add my own fork to the IDE.

#

AFAICT.

#

Ooh. Can I push my work, and have you check it too?

leaden walrus
#

it's only going to be a few header files, right?

pallid grail
#

pins_arduino.h x 3

#

QT Py, Feather, Itsy.

leaden walrus
#

this is a bit of hack, but easy since it's only a few files...

#

you're going to fork/clone the core repo, make changes there, etc. as normal

pallid grail
#

Done

leaden walrus
#

to test - manually replace the BSP files with ones from fork

pallid grail
#

Oh, I didn't realise they were local.

#

I thought it was always pulling from the link in the IDE prefs.

#

Ok, that makes sense.

leaden walrus
#

you're on mac?

pallid grail
#

Yeah just found it.

leaden walrus
#

something like Library/Arduino15/packages ?

#

under there

pallid grail
#

Yep

leaden walrus
#

ok, yah, just drill down in there and manually replace

pallid grail
#

Yep in progress. Thank you!

leaden walrus
#

and then recompile a test sketch

pallid grail
#

It compiles every time I try to load it, right?

leaden walrus
#

yes. or can use the check mark in the ide.

pallid grail
#

Got it.

leaden walrus
#

instead of arrow

pallid grail
#

Right

leaden walrus
#

to sanity check it's using the files, intentionally add a syntax error to one and make sure you get a compile time error

pallid grail
#

Oh to the .h file?

leaden walrus
#

yah. like just add hello to the first line.

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can be anything

pallid grail
#

oki

leaden walrus
#

just to verify some cached version isn't being used, etc.

pallid grail
#

failed on hello.

leaden walrus
#

cool. so it's using the files. can remove and test the real changes.

pallid grail
#

Yep!

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Blinky NeoPixel!

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1 down, 2 to go. Thanks again, @leaden walrus!

leaden walrus
#

np

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at some point, would like to figure out a non-hack way for this. just haven't done more than simple patches, so hack worked for now.

pallid grail
#

Yeah fair enough. Same in my situation. I wouldn't even know where to begin with more than simple fixes. Which, by the way, wouldn't have been able to do this without your help understanding the (#u) from yesterday. So thanks for that. Was ezpz.

#

3 for 3!

livid osprey
#

Start with what you need to do and see if it fits on the pins of an UNO, that'll tell you right away.

proud lion
#

Hi there. I'm having an issue getting my Adafruit Metro ESP32-S2 to recognize an SD card. I'm using the Adafruit Data Logger shield and using the SD_Test example for the board but the serial monitor says "Card Mount Failed". I know it's not a problem with the SD card or shield because it works on my Adafruit metro board. Any ideas about what I need to change in the code for it to work?

safe shell
#

I haven't done the audio part, but SD card is straightforward, and SPIFFS is quite do-able. You can transfer files between them, or I believe you can load up SPIFFS at flash time.

agile rampart
#

Thank you. I am currently using SPIFFS to store web pages. They are easy to work with. The bluetooth connection to the headset and the playing of the audio file across that connection is my real challenge.

lapis meteor
#

is it a good idea to use dc motors without the driver?

pine bramble
#

the only thing that shouldn't be done with motors afaik is connecting power directly to it without a resistor. Most small motors are gonna blow up if you put 2A or 9A on them...

lapis meteor
#

2A or 9A what?

pine bramble
#

do you mean what as in you don't know what I mean or as in it seem incorrect?

lapis meteor
#

i mean what do you mean by 2A/9A

pine bramble
#

do you know ohm law ?

lapis meteor
#

power?

pine bramble
#

2/9 amperes

lapis meteor
#

not really ig

#

so if i dont use resistor my dc motor will be alright?

pine bramble
#

Most electronics scale motors can't handle 2 or 9 amperes (ie:2A/9A) . The typical batteries are 1.8V or 2V for AA and 9V for the square one

#

no the opposite

lapis meteor
#

oh

pine bramble
#

if you don't use a resistor it will burn and smoke in a few seconds

lapis meteor
#

i will be giving it power directly from arduino no external battery

pine bramble
#

so most of them operate in the miliamps range

lapis meteor
#

oh

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so i should be using the resistor

pine bramble
#

so you have to provide a resistance like 1000 ohm

lapis meteor
#

got it ty

pine bramble
#

so the current from the battery goes from 1.8/2/9A to 1.8 /2 / 9 miliampere

lapis meteor
#

oo

pine bramble
#

the datasheet of your motor will tell you the exact range it can handle

#

do you know what motor you have ?

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as a general rule you can't assume an arduino or other board have built-in protection for leds or batteries

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they both require a protection resistor

lapis meteor
# pine bramble do you know what motor you have ?

i dont have one, but i will be getting this one https://www.amazon.in/Sparklebox-Motor-100RPM-Soldered-Arduino/dp/B09JC96SXL/ref=sr_1_18_sspa?crid=3EVJ16AXBY3LB&keywords=dc+motor&qid=1643288394&sprefix=dc+m%2Caps%2C255&sr=8-18-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzUjQ5UTIzMFJUNTRTJmVuY3J5cHRlZElkPUEwODE5ODY1MjRJT0pTWkNJS0xHRSZlbmNyeXB0ZWRBZElkPUEwMTIzMzA2M043Q0RYQkFCQkROWSZ3aWRnZXROYW1lPXNwX210ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

pine bramble
#

do you understand so far or I lost you somewhere ?

lapis meteor
lapis meteor
pine bramble
#

do you have an arduino or something similar ?

lapis meteor
#

yes i do (arduino uno), ive also made couple of cool projects

pine bramble
#

may I suggest you experiment with a cheap motor on your arduino before you do something on such an expensive kit ?

lapis meteor
#

sure

#

btw i also have a stepper motor with me but i realized it won't be good for fast things

pine bramble
lapis meteor
#

alright

pine bramble
#

your kit also come with resistors, but I couldn't find out if a manual came with it

lapis meteor
#

oh

pine bramble
#

stepper motor and dc motors are usually for different usage

lapis meteor
#

ik

pine bramble
#

I'm oversimplifying but stepper motor usually position whereas dc motor usually rolls

lapis meteor
#

oo anyways ty for helping i gtg now

pine bramble
#

no problem

livid osprey
#

@lapis meteor Running small toy motors for short durations might be manageable on an arduino, but you do risk damaging the arduino if you overdraw the current. Arduino is only designed to handle 40mA output from a single digital output, so you should definitely use at least 125 ohms to limit your output current to a safe range.
Keep in mind that those motors are 40-80mA without load, meaning you can expect them to draw more current when the motors aren't freely spinning. Stall current can easily burn out an Arduino if you're not careful, so I strongly recommend using a driver chip instead of direct GPIO pins.

lapis meteor
#

i understood, so i should get a driver chip

severe latch
#

Hello. I am using the nRF52840 feather board powered with a battery and trying to measure the voltage using the sketch provided on Adafruit.

unknown.png
#

However, the measured voltage was always between 4.1 V and 4.2 V (even after leaving the battery and the board running for a while)

#

am I doing anything wrong ?
I appreciate any help/suggestions

livid osprey
#

Are you actually running it on battery or is it plugged into USB?

severe latch
severe latch
livid osprey
#

It's unlikely there's an issue with it if it's reading in the range of 3.2-4.2V, but you could use an external measurement to validate it. Multimeter, voltmeter, etc.

severe latch
#

Okay. Thank you

#

one more question, even when I disconnected the battery and left the board connect via USB ... the voltage reading remained 4.2 V

#

should it go to 0V when the battery is disconnected ? or not as it is still powered by the USB

gilded swift
#

It does so regardless of if a battery is present

severe latch
#

okay makes sense . thank you

west tapir
#

Hi. I'm using a QT-Py to run a temperature monitor for my outdoor fridge/freezer. I'm programming it via arduino, not CircuitPython. I have three DS18b20 one-wire sensors in parallel, and an SSD1306 screen. It compiles fine, and upload is hit-or-miss, mostly "hit" (occasional COM Port collisions that I'm not sure of, but since it usually works, I'm not yet worried about that.)

Anyhow, I build and upload the sketch and it runs fine, updating the screen and what-not. But if I hit reset, or unplug and plug it back in, it's as if the sketch was never uploaded.

I've read about the bootloader, but it seems just to be an "alternative" way to upload the sketch.

I'm sure it's simple, but what am I doing wrong? Is there a step I'm missing, to get the sketch into NVM?

stable forge
west tapir
#

M0 (looking for deeper detail...)

stable forge
#

if the sketch runs when it's uploaded, then it's in flash. Could you upload your sketch? Use the + button on the left

west tapir
#

Here's the doohickey. The pixel at the bottom crawls left to right as proof-of-life.

IMG_1469.jpeg
#

BTW - Adafruit QT PY (SAMD21)

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BRB - running to grab the 3D printed case. 🙂

#

Back.

stable forge
# 
// start serial port
  Serial.begin(BAUD_RATE);
  while (!Serial);
west tapir
#

ARRRRGH.

stable forge
#

This will wait forever if there is no serial connection. Is that what you want?

#

[re threads; it's ok to make one, it's ok not]

west tapir
#

Nope. Lemme see. (It was there because it eliminated a runtime issue. Get it running, get it running right, get it running well.) I'm still on step 1. 🙂

stable forge
#

is that why you said "ARRRRGH"?

west tapir
#

yes... 😦

stable forge
#

ok 🙂 You can put a delay there if you want, a second or two, or wait up to a certain amount of time for it to be ready, etc. But you may not need that.

#

this is a really common issue; I thought the chances were at leat 50/50 that was the problem

west tapir
#

I added a half-second delay, and it's right spiffy.

#

Again, thanks!

stable forge
#

np!

lapis meteor
#

Can I use uln2003 driver for DC motors?

cedar mountain
#

It may be difficult to measure the data line with a multimeter, since the signals are so fast. It would likely idle at 0V, but when LEDs are being updated it would be some intermediate voltage, averaging out 0V and 3.3V data bits.

lilac rain
north stream
silent void
#

Hello guy, I not speak English very well, but, i need help, I'm new here, and I don't know how to record my code in adafruit , could anyone help me? I have adafruit pro trinket.
Eu sou Brasileiro, se tiver alguém pra me ajudar, eu agradeço

stable forge
pine bramble
#

Hi Everyone, I would like to use the RFID component ST25DV16K with the QT Py RP2040 microcontroller in Arduino IDE. Do any of you know how to install this board in the Arduino IDE?

leaden walrus
lilac rain
#

are these the correct PIN numbers to reference in the arduino IDE. i assumed D6 was pin 6, and wasnt getting anything.

unknown.png
north stream
#

There are two sets of pin numbers, the purple ones and the grey ones. The diagram shows "Arduino" in purple, so I'm guessing the purple numbers are for the Arduino IDE.

lilac rain
north stream
#

Probably so, but I'm not sure what (if anything) Arduino pin 6 would map to. You'd have to pull open the board definition files to see what's going on (I've done this, once in a while, when I got curious)

lilac rain
#

thank you @north stream, appreciate your time

rugged plinth
pine bramble
#

Thank you Cater 🙂

cold lagoon
#

i need an arduino with 6 pwm pins but i also need the mosi, miso, sck pins free.

vivid rock
true spear
north stream
rugged plinth
#

does anyone know why I'm getting this error when I run fatfs format example with the adafruit spi flash library

unknown.png
cedar mountain
#

Any chance your flash chip has a write-protect on it?

pine bramble
#

Hi all, I happen to want to test the ST25DV16K RFID, for that I have a QT PY RP2040. I would like to ask you a few questions:
1.Is there any library for ST25DV16K RFID in Circuitpython.
2. If not, then should I work on Arduino?
3. I have a conflict with the COM ports, when I work on Arduino, because suddenly my board is connected to a USB, but it doesn't have COM port, which is fundamental in the Arduino IDE.
Can you help me?

solemn cliff
#

you might need to put it in RPI-RP2 mode the first time you upload a program with the Arduino IDE, and then it installs the Arduino bootloader ?

rugged plinth
#

it worked with another library so I think the chip being write protected unlikely

pine bramble
#

Thanks Neradoc, i try uplod a program with Arduino IDE.

elder hare
#

im using WebSocketsServer on my ESP32! how can i send a message from the server (esp32) to the client connected when they connect without it being a request from client?

livid osprey
rugged plinth
#

hmm

#

I think thats unlikely

#

if it is write protected is there a way to reverse it?

pine bramble
#

Unfortunately I have not been successful with the COM port, there is a conflict, in the Device Manager it says "there is an unknown usb" It demands the Device description. Could someone help me to solve the problem?

willow compass
#

I am currently using an Adafruit Ultimate GPS with an Arduino Mega, I was curious if there was a function already built into Arduino that was able to find distance between two longitude and latitude points that anyone was aware of. Didn't look like there was something like this in the GPS library, nor did I find anything from some google searches.

cedar mountain
#

Looks like the TinyGPS Arduino library has a distance_between() function, for example.

true spear
pine bramble
#

QT PY RP2040

#

I have tried it on Windows 10 and 11, when I do a boot and reset, then the board appears on the computer.

#

when I do a hard reset everything is erased, then I load the circuitpython, because there it recognizes the port, then I upload example for RP2040, then it works. But when I load my Sketch the COM disappears.

#

I have also loaded Nuke.uf2, so that it deletes everything that is not needed in the Flash.

jaunty fox
#

if i soldered to the pads on the back of a feather board, would i be able to connect it as if it were using the usb plug? looking at the sections next to D+ and D- (ignore the red arrows)

322A87F8-78B0-49E3-A825-A4DFC06A53FF.png
north stream
#

Probably, as long as the wires were short and reasonably low inductance (antireflection resistors might help too)

#

That's assuming you want to connect to D+ and D-. If you were thinking the pads next to the D+ and D- pads (not sure what "sections next to" means here), those are likely ground/shield pads.

jaunty fox
true spear
rugged plinth
vivid rock
#

@jaunty foxto clarify what was said above: the two small round pads (without holes in them) next to D+ and D- are indeed connected to D+ and D-.
All other, larger pads with holes are just connected to ground.
If you need to connect to 5V contact of USB as well, use the hole labeled "USB"

rugged plinth
pine bramble
#

for some reason this is the error i keep getting
i have my settings just right for burning but should i just try compiling with like platformIO?

# 
Arduino: 1.8.19 (Mac OS X), Board: "Adafruit QT Py M0 (SAMD21), Small (-Os) (standard), TinyUSB, Off"

/Users/1045447/Library/Arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: sketch/my_first_sketch.ino.cpp.o: in function `setup':
/Users/1045447/Documents/Arduino/my_first_sketch/my_first_sketch.ino:3: undefined reference to `Adafruit_USBD_CDC::begin(unsigned long)'
/Users/1045447/Library/Arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: /Users/1045447/Documents/Arduino/my_first_sketch/my_first_sketch.ino:4: undefined reference to `Serial'
/Users/1045447/Library/Arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: sketch/my_first_sketch.ino.cpp.o: in function `loop':
/Users/1045447/Documents/Arduino/my_first_sketch/my_first_sketch.ino:7: undefined reference to `Serial'
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Adafruit QT Py M0 (SAMD21).


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
# 
void setup(){
  pinMode(A0,INPUT);
  Serial.begin(9600);
}
void loop(){
  Serial.println(analogRead(A0));
}
#

nvm

inland gorge
pine bramble
#

ohhhh

#

thx

# 
Arduino: 1.8.19 (Mac OS X), Board: "Adafruit QT Py M0 (SAMD21), Small (-Os) (standard), TinyUSB, Off"

Sketch uses 18464 bytes (7%) of program storage space. Maximum is 262144 bytes.
Device       : ATSAMD21x18
Version      : v1.1 [Arduino:XYZ] Sep 22 2020 19:41:18
Address      : 0x0
Pages        : 4096
Page Size    : 64 bytes
Total Size   : 256KB
Planes       : 1
Lock Regions : 16
Locked       : none
Security     : false
BOD          : true
BOR          : true
Write 18704 bytes to flash (293 pages)
[==============================] 100% (293/293 pages)
Done in 0.268 seconds
Verify 18704 bytes of flash
[======================        ] 74% (218/293 pages)An error occurred while uploading the sketch
[==============================] 100% (293/293 pages)
Verify failed
Page errors: 293
Byte errors: 17895


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
#

i cant get it to upload

pine bramble
#

what did i do wrong?

#include <Arduino.h>
#include <Adafruit_NeoPixel.h>
#include <Adafruit_TinyUSB.h>
// create a pixel strand with 1 pixel on PIN_NEOPIXEL
Adafruit_NeoPixel pixels(1, PIN_NEOPIXEL);

void setup() {
    pixels.begin();  // initialize the pixel
}

void loop() {
    // set the first pixel #0 to red
    pixels.setPixelColor(0, pixels.Color(255, 0, 0));
    // and write the data
    pixels.show();
  
    delay(1000);
    
    // turn off the pixel
    pixels.clear();
    pixels.show();
  
    delay(1000);
}
Screen_Shot_2022-01-31_at_4.19.27_AM.png
#

i put the libs in their places so whats going on?

rugged plinth
livid osprey
#

Was I? I’m not convinced myself, since I just tossed a shot at the dark out there. It could’ve been the flash getting stuck in a weird state in hardware?
Regardless, I’m glad it’s working for you now!

rugged plinth
#

so the flash chip works and it's not write protected because of the previous library. I'm not too sure what happened but when I tried using a Teensy 3.2 with the same flash chip I got the chip working, but when I tried using a teensy 4.0 it didn't work. My uneducated guess is that there might be some incompatibility with the adafruit spi flash library and the Teensy 4.0.

crystal frigate
#

I have accidentally broken the volume slider on this thing

#

Can I bridge the points together and just make it work at full volume?

crystal frigate
#

if I put my thumb over it... it works just fine.

leaden walrus
#

@crystal frigate that'll little volume pot is setup as a simple voltage divider for the input signal

#

you'll want to short pins 2 and 3

#

and make sure not to short to pin 1

#

which is GND

crystal frigate
#

Interesting, thanks!

#

I ruined it.

marsh cloak
#

I need some help troubleshooting code. I've narrowed the problem down to this point:

int buttonState = 0;

...

void setup() {
...
}

void loop() {
int buttonState = 1;
checkButton();
}

void checkButton() {
if (buttonState == 1) {
Serial.println("Button pressed. Looking for new target UID.");
long start = millis();
bool triggerState = true;
// digitalWrite(LED_Pin, HIGH);
}
}

#

for whatever reason, "if (buttonState == 1) " never is true. Did I use my variables wrong?

leaden walrus
#

you're re-declaring it in the loop

# 
void loop() {
  buttonState = 1;
  checkButton();
}
#

try that

marsh cloak
#

checkButton() then throws an error saying "buttonState was not declared"

#

scratch that, I had it filled wrong. Thankyou!

lilac rain
#

so im running a basicOTA code in arduino, which allows it to connect to my home network... however if i take my project elsewhere, it wont continue to the rest of the code until it gets a wifi connection to the home network.

Is there a way around this? I'm using a basic LED code and only have the OTA option enabled for future updates. its not mandatory to have a connection, but i would like to have the LED code execute regardless of connection or not. how can I tell the code to proceed if no connection is able to be made?

true spear
feral pivot
#

I'm trying to make a power meter with a esp32 and ads1115.When trying measuring current with a shunt and measuring a voltage with a voltage divider SEPARATELY everything works flawlessly. But when I combine 2 codes together values are flying around like a floating analog pin value and adc module draws 50mA 1.5v from constant current psu and heats up. 40ms delay between measuring analog values and also 40ms delay between changing input gain 16x to 1x while these are happening

cedar mountain
feral pivot
#

I powered it with a cc psu because every time I connected the adc power led on the arduino got a little bit darker than normal

woeful knot
#

but to put more in parallel like 10 pcs from both sides (5 in pair)

#

Question - how fast it can detect movement, and is it gonna be sufficient for counting the seeds in harsh environment full of dust and dirt?

#

I want to build something close to this: https://www.youtube.com/watch?v=DG85Cd9jpeg

YouTube
DICKEY-john
Hy Rate Plus LED Seed Sensor

The Hy Rate Plus™ LED Seed Sensor is the sensor of choice for all seed types regardless of size, shape and seeding rate. From larger seeds such as corn to small seeds like canola, the Hy Rate Plus accurately counts seeding population during planting, providing confidence that your row units are working properly and seeds are being placed for opt...

▶ Play video
cedar mountain
livid osprey
feral pivot
cedar mountain
#

Any chance you're connecting them to the wrong Arduino power rail, like it's a 3.3V ADC module but you're hooking it to 5V or the raw VIN supply?

stoic island
#

Hi, apologies if this is the wrong channel, but here goes. I've got a gargoyle statue that holds 2 candles and is powered by 3 AAA batteries. I'd like to toggle the lights via wifi, and so I have some D1 Minis, but I'm pretty newb with hardware still. Do I just want to treat the statue as if it were an external led to blink? Or am I completely off base

feral pivot
cedar mountain
woeful knot
feral pivot
feral pivot
cedar mountain
feral pivot
#

With 0.01 ohm at max 0.256v with 16x gain 0.256 volt/0.01 ohm=25.6A is max current with 0.256v voltage drop across the shunt

cedar mountain
feral pivot
cedar mountain
feral pivot
#

I was testing it with 3.3v across gnd and in+ and 1A current through the shunt while testing the code

cedar mountain
#

That should be fine, then.

#

I'm not sure what to tell you. It still sounds like the ADC module(s) are fried, but it's unclear what originally happened to them to cause that.

feral pivot
sacred ivy
#

(or something excessively large)

feral pivot
sacred ivy
feral pivot
#

Find out why my adc were frying. find a forum post about same question on texas instruments forum and he says problem was ads1115 wasnt designed to take a floating input. But I didnt understand how a connected input is a floating input?

north stream
#

I think it's referring to a voltage that has a component significantly different from the ground reference. You might have more luck with low side current sensing, if your application supports it.

median mica
#

I’d like to use Microchip/Atmel Studio to program chips. Can anyone recommend a programmer? From what I’ve read I should try to find a AVRISP mkII clone.

leaden walrus
#

what chips?

median mica
#

Oh yeah, that would make a difference. Attiny’s, Atmega’s, whatever I can get to experiment with. Maybe SAM.

#

I’ve used Arduino IDE to program those chips, but I’d like to move away from Arduino

spark drum
#

How do I de solder a smd connector with a soldering iron?
I have my temp set to 260C
And am tryna de-solder a lipo connector off of a artemis

WIN_20220202_15_20_35_Pro.png
livid osprey
#

Alternatively, you can try to get snips to clip the pins, then desolder them one by one.

#

Proper way would be to wick the solder or use chip quik, if you need to keep everything intact.

true spear
neon cobalt
#

i have 4 led's receiving power from 4 different pwm pins and they are sharing a grounded row in my bread board. Something weird is going on, when i set my analog write power to 127, only 2 led's light up, when i set the power to 128, all led's light up, whats going on?

cedar mountain
neon cobalt
#

oh oops

neon cobalt
#

oh i figured it out

#

i accidentally hooked 2 led's to a pin thats not a pwm pin

zealous jetty
#

Hi all, I'm having some troubles detecting a blinking LED using a digital input... I'm using a transistor switch but it seems that it's not saturated enough to work... Am I missing something here?

Screenshot_2022-02-03_at_12.44.52.png
pine bramble
#

Current flows from ground against the arrow up to Vcc through the Base, in that transistor.

#

I would model it in a simulator.

pine bramble
# 
$ 1 0.000005 10.20027730826997 50 5 50 5e-11
t 464 224 512 224 0 1 0.49122030547086204 0.5135427144553883 100 default
g 512 240 512 336 0 0
r 464 208 464 112 0 220000
w 464 112 384 112 0
R 288 112 240 112 0 0 40 4.5 0 0 0.5
r 384 112 384 208 0 470
162 384 208 384 288 2 default-led 1 0 0 0.01
g 384 288 384 336 0 0
w 464 224 464 208 0
s 288 112 384 112 0 0 false
r 592 208 592 112 0 500000
w 512 208 592 208 0
R 592 112 640 112 0 0 40 3.3 0 0 0.5
p 592 208 592 272 1 0 0
g 592 272 592 336 0 0
#

for:

#

@zealous jetty
(Open circuit on the input side)

circuit-20220203-1246.png
#

The voltmeter represents a GPIO input.

zealous jetty
#

Wow thank you I was just trying to model it too. But then this doesn't seem to look too bad right? Pulling HIGH and LOW...

pine bramble
#

None of it looks exactly how I'd approach things but I was trying to restrict myself to what you came up with. ;)

#

I would be only worried about frying the GPIO pin by some assumption I've made.

zealous jetty
zealous jetty
pine bramble
#

I think in this role the transistor serves to permit the presence of a 4.5 VDC active circuit that won't harm a 3.3 V microcontroller's GPIO pin.

#

Honestly this was stretching my ability pretty far as-is. ;)

#

I would immediately think about level-shifting circuits.

#

But that NPN is probably enough, here, and they're inexpensive and usually found on-hand in your parts box.

zealous jetty
#

I already have this circuit soldered and wired-up but something seems to be going wrong. I'm now trying to fit in the specs of the transistors datasheet into the circuit model you provided!

pine bramble
zealous jetty
pine bramble
#

I selected the resistors on minimal current flow through that transistor (mainly to save on battery life).

#

When you mouse-over anything in that simulator (if your browser supports the sim at all) it gives typical readings your test equipment would expose.

#

It's based on thevenin's/kirchoff type ideas.

#

You must use at least 1 ohm as a resistor in any path where current would go to infinity or the sim won't even run.

#

That same sim has an arduino AVR variant where you can add code!

#

example here:

#

I embedded the circuit in the C/C++ source code there, and also gave the web address for the sim.

#

It basically reads a pb switch on Pin 8 and outputs its findings on Pin 9 (an LED monitor circuit).

#

Designed as push-on, push-off using a momentary contact pb switch.

zealous jetty
#

Wow that's pretty cool, thank you so much!

pine bramble
#

You're quite welcome.

zealous jetty
#

Will spend the rest of my day looking into this 😉

pine bramble
#

Yeah I was very resistant to any simulator until I found this one.

#

Now I'm all about it - really like it.

#

Use right-click on the mouse, Drag, then from the pick list, Drag All - makes things easier.

#

I think you press ESC to release the mouse pointer when it gets confusing.

#

My fingers know it but the rest of me is just guessing. ;)

royal hare
#

Oh that's a nice simulator. Thanks.

pine bramble
#

;) isn't it. You're welcome.

#

The wokwi one is better for some limited use cases.

#

It's got a good 74HC595 shift register ready to go.

royal hare
#

Awesome. I'll play around with these. I haven't used simulators at all myself but I think I will now.

pine bramble
#

Yeah I was totally 'against them' then this thing shows up in a chat so I tried it against my better judgement.

#

Loved it. ;)

lilac barn
#

is it possible to use audio source from pc, in order to create a music/sound reactive led strip?

cedar mountain
lilac barn
#

Okay good to know, however i don't think i can write my own program for it so i'll have to find one.

#

Thanks

fierce ridge
#

New to the NMEA standard and wanted to ask, if one is parsing the output of a GPS module, would you be able to calculate time to first fix for each satellite or only those that give lat/long coordinates?

pallid grail
#

@leaden walrus Hiya. You around?

leaden walrus
#

yep

pallid grail
#

And I want to finish the guide.

pallid grail
#

@leaden walrus The original example was backwards from the silk. So instead of changing the silk, which she almost did, she realised we could change the software.

#

@leaden walrus Also, when an Arduino library gets bumped, how long before the update shows up in the IDE?

leaden walrus
#

not sure...maybe a daily thing

pallid grail
#

Ok

#

I mean it doesn't matter, I guess, the file already exists, I can finish the guide while it propagates

fierce ridge
#

.

leaden walrus
#

@pallid grail one cosmetic tweak

pallid grail
#

@leaden walrus Thank you!

leaden walrus
#

np

spark drum
#

What temp in c should I use to try and get the connectors off?

#

Not tryna re-use the connectors just tryna make them come off cleanly without damaging the board

true spear
spark drum
#

At least it was dirt cheap this pcb

#

Im debating on whether or not I wanna get another of it or just make my own pcb

grim basalt
#

Hello people would u mind letting me know any of the best discord server communities for the domain Computer Vision and Image Processing because I have many problems with that domain I need to solve and I need some help..

cold lagoon
#

Help. This is part of an PCB ive made, and the nrf24l01 doesn't work. i have no idea why (the black dots are solder pads they can be ignored)

unknown.png
cedar mountain
cold lagoon
#

no sparks, no smoke, no signal from the nrf 🙂

cedar mountain
#

By "no signal" do you mean it doesn't respond over SPI, or you're not receiving data on the other side of the radio link?

cold lagoon
#

jup i cant send and i cant receive anything

cedar mountain
#

Sorry for being pedantic about this, but we're not mind-readers, and we don't have magic wands to make stuff work as soon as you tell us that it's broken. (And we're all volunteers, so under no obligation to help at all.) The only way through this problem is going to be a tedious troubleshooting process where you have to do most of the work and over-share information about your situation. "Here's the exact code I'm running, here's the exact error message I'm getting, here's what I expected to happen instead, here's a picture of my breadboard showing all the wire connections, here's the steps I've already taken to try to diagnose exactly where things are breaking", etc. etc. etc.

cold lagoon
#

ok. Both sender and receiver codes are 100% working, ive checked them with proper arduinos. The sender code just sends 444 and the receiver code displays everything, it gets. Problem is it displays nothing.
ive already retraced the traces twice and also measured if they're ok and they are.

unknown.png
cold lagoon
#

one thing ive noticed just now, as soon as i disconnect the nrf module i get in the while (radio.available()) loop. but when its connected i don't get there anymore

elfin gazelle
#

Just had read some tutorials about header files and in some they just used a header file with a class which is included in the ino file and in others they created a cpp file with the header file. Wondering what's the difference between these approaches...

cedar mountain
cold lagoon
#

nope thats not my problem. i get nothing not even the lowest 8 bits

elder hare
#

This pattern draws a bar of 4 pixels length ( PatternBarLength ) and sends it down to the end of the strip and then draws a new bar of 4 pixels and sends it down (each bar stacks ontop of each other and when the strip is full the "last bar of 4 pixels" sweeps over the entire strip and every pixels behind it gets set to "black" and it sets itself at the end of the strip and repeat! 🙂

my problem here is when i start the pattern it stops the first bar of 4 pixels 4 pixels befor the end so i have 4 black pixels at the end but once the pattern has gone a full cycle then it fills the entire strip...

hope this was clear enough, i dont see where the problem is

    virtual void draw(CLEDController& c)
    {
        CRGB* leds = c.leds();
        int size = c.size();

        const uint16_t TotalLength = size;

        static uint16_t end = TotalLength;
        static int block = 0;
        static CRGB color = 0;
        static int i = 0;  

        // reset after each full sequence
        if ( block >= TotalLength / PatternBarLength )
        {
            block = 0;
            end = TotalLength;
            if ( PatternColorUse == RANDOM )
                color = CHSV( random( 0, 255 ), 255, 255 );
            i = 0;
        }

        if ( PatternColorUse == RANDOM )
            leds[ i ] = color;
        else
            leds[ i ] = PaletteMode( c, i, PatternBrightness );

        if ( i >= PatternBarLength )
        {
            leds[ i - PatternBarLength ].fadeToBlackBy( 255 );
        }

        if ( ++i >= end )
        {
            i = 0;
            end -= PatternBarLength;
            if ( PatternColorUse == RANDOM )
                color = CHSV( random( 0, 255 ), 255, 255 );
            block++;
        }
    }
north stream
#

It looks like you're trying to use i to count and block to address your LED block, but you're incrementing them separately. I think it would be simpler (and may solve your problem) to just have (and increment, and test) a single variable.

elder hare
#

so i removed block and only used i but now the pattern does not work :/

elder hare
#

@north stream fixed it

elfin gazelle
#

trying to mulitplex bounced buttons. And my code just works when I have that if statement checking if mux.read(0) is LOW and then Serial.print "Is LOW". And then it will also Serial print "Has changed" from the bounce if statement. When I remove the Serial.println from the mux if statement or the whole statement my bounce.changed() does not work anymore. ??? ```#include "Type4051Mux.h"
#include <Bounce2.h>

Bounce bounce = Bounce();

Type4051Mux mux(4, INPUT, DIGITAL, 5,6,7);
Type4051Mux mux2(3, INPUT, DIGITAL, 5,6,7);

void setup() {
// Initializes serial port.
Serial.begin(9600);
bounce.attach( mux.read(0), INPUT );
bounce.interval(5);

}
void loop() {
bounce.update();

if (bounce.changed()){
Serial.println("Has Changed");
}

if (mux.read(0) == LOW){
Serial.println("Is LOW");
}
}```

#

dont know if that is actually not working the way I want it to: bounce.attach( mux.read(0), INPUT );

#

and also this just works with the Serial.println("Is LOW"); in it. if (mux.read(0) == LOW){ if (bounce.changed()){ Serial.println("Has Changed"); } Serial.println("Is LOW"); }

leaden walrus
#

looks like the bounce2 lib wants a pin number

elfin gazelle
#

So these libraries dont work together though?

leaden walrus
#

that'd be my guess

elfin gazelle
#

Okay, any hint how to multiplex bounced buttons?

leaden walrus
#

in general, your approach is ok, it's just the two libraries don't seem to work together

#

the bouncer library is reading the pin directly, not through a muxer

#

^^ that's what update() is relying on

elfin gazelle
#

So for example I will just use the mux libraray and do the bouncing without a library?

elfin gazelle
#

I could not try it out at the moment but would that approach just count +1 when the button is high and count +1 just the button goes Low and high again instead of doing +1 all the time the button is high?

# 
  int buttonState;
  int bounceState = LOW;
  int count = 0;

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
  
  if (buttonState == HIGH && bounceState != buttonState){
    count ++;
    bounceState = buttonState;
  } else if(buttonState = LOW){
    bounceState = LOW;
  }
}```
pine bramble
#

hi, i couldn't get the "Adafruit 2.9" Grayscale eInk / ePaper Display FeatherWing - 4 Level Grayscale PID: 4777" to work with the RP2040. Screen just stay black

pine bramble
#

test file (Thinkink_gray4) is just black/white alternating in the test.

neon cobalt
#

whats the difference between a for loop and while loop?

odd fjord
forest cape
#

Hello guys I need a help I just begin to learn how to code. So I want to connect my dac which has i2c connection. I already set up the external pull up, do I still need to write pull up function in my code? Thank you!

north stream
vale dew
#

Hey, I am using the Adafruit BNO055 with an Arduino Due. The Arduino Due has two I2C / TWI interfaces SDA1 and SCL1 are near to the AREF pin and the additional one is on pins 20 and 21. How do I tell it during the contructor that I want to use the SDA1 and SCL1 instead of pins 20 and 21. Adafruit_BNO055 bno = Adafruit_BNO055();

cedar mountain
vale dew
#

oh wait nvm

#

its &Wire1

#

Thank you so much

pine bramble
#

Hi all, I happen to have the ST25DV16, I have used it with ESP8266 on Arduino, but it had errors. So now I have a Feather STM32F405, It's working fine for me, Now I need you to help me write some text on it. The library in Arduino writes a URL, but this way it doesn't work for me. I need to write a text, and I have difficulties. Could you please explain me how to write a simple text? I have looked around the library and it is not that easy, because there is no function to write text.

severe latch
#

Hello . I was wondering what would be the best way to create a log file on nRF52840 feather ?

#

I am using nRF52840 with RTC DS3231 .. so my goal is to create like a simple log file to store the time stamps and temperature for example every 10 minutes

stable forge
severe latch
#

I will not be using an SD card for now

#

I am using Arduino

stable forge
#

oh, sorry, I missed what channel we are in

severe latch
#

No that's totally fine ! I forgot to mention that as well

stable forge
#

hold on...

#

looking for the right thing...

severe latch
stable forge
severe latch
#

Okay will look into this. Thank you !

blazing crane
#

Looking at the sample sketches for a motor driver I bought. They use the PWM pins as output, but I'm not sure there's enough pins for my needs? Is there a reason I can't use the analog pins?

#

Wait, nvm. Did some Googling. I think I'm wrong 😦

livid osprey
blazing crane
#

I basically need to run SPI and and the Servo library at once... It seems like there could be interference from what I've read

livid osprey
#

Uno?

blazing crane
#

I guess yeah

#

Using an Uno atm, then most likely switching to the smallest ATtiny I could get that suits my needs

#

For the final design

livid osprey
#

It's worth a try. I'm not sure what interference your google search came up with, but they should be fine if they have their own pins.

blazing crane
#

Which PWM pins work on which timer btw?

lilac rain
#

does anyone have some time to see why this following sketch is not lighting up my neopixel ring? the sketches are essentially two default examples merged together. https://pastebin.com/rtr0ARqb

Pastebin
plshelp - Pastebin.com

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

cedar mountain
lilac rain
cedar mountain
#

Yeah, you would want to move the code that's performing the display animation into loop() so you end up doing one Neopixel step, then one display step, then another Neopixel step, etc.

lilac rain
fluid nebula
#

Looking for a little help with platformio programming an adafruit ItsyBitsy M0

In pio I can get it my program to compile/upload and everything looks fine, but the device stays "disconnected" (purple dotstar on the board) or in bootloader mode (green led) and does not enter the program. If i flash the same code from Arduino, it works as expected
Arduino is writing more bytes - which is strange (33736 in arduino vs 23344 in pio)

#

is there a setting/flag I might be missing in pio?

wraith current
#

@fluid nebuladoes a manual reset after programming make it work ?

fluid nebula
#

nope - button presses either end up disconnected or in boot mode

wraith current
#

what's your .ini file look like ?

fluid nebula
# 
[env:adafruit_itsybitsy_m0]
platform = atmelsam
board = adafruit_itsybitsy_m0
framework = arduino
build_flags = -D USE_TINYUSB
lib_deps =
  ; adafruit/Adafruit TinyUSB Library@^1.9.2
  fortyseveneffects/MIDI Library@^5.0.2
  adafruit/Adafruit BusIO@^1.11.0
  Wire
  adafruit/Adafruit FRAM I2C @ ^2.0.0
  adafruit/Adafruit Keypad @ ^1.3.0
  adafruit/Adafruit NeoPixel @ ^1.9.0
  adafruit/Adafruit SSD1306 @ ^2.4.6
  adafruit/Adafruit GFX Library @ ^1.10.12
  olikraus/U8g2_for_Adafruit_GFX @ ^1.8.0
  pfeerick/elapsedMillis@^1.0.6
  adafruit/Adafruit DotStar@^1.2.0
#

(was confused if i needed to have tinyusb in lib_deps, but it doesnt seem to matter either way)

wraith current
#

hmm, that's really weird that ardu puts 10k more data on there.

fluid nebula
#

10K that makes it work! LOL

wraith current
#

sorry, i have no idea. did you try doing pio clean ?

fluid nebula
#

yeh... trying to load an example (arduino-blink) right now and it is grabbing some toolchain thing

#

perhaps something is/was missing in my install

#

thanks tho!

fluid nebula
#

@wraith current I got it to work by adding lib_archive = no
don't understand why yet, but at least it works 🙂

severe latch
#

Hello. I was checking the LittleFS library and found another one "InternalFileSystem" which is dependent on Little FS. And from what i've read is that InternalFileSystem API is a higher-level abstraction and easier to work with (it is a wrapper around little FS)

#

However, is it possible to append while dealing with such files ? I wasn't able to find any function that would allow me to append data on an already created file. I only saw Read/write functions. Am I missing something ?

https://github.com/adafruit/Adafruit_nRF52_Arduino/tree/master/libraries/InternalFileSytem/examples

GitHub
Adafruit_nRF52_Arduino/libraries/InternalFileSytem/examples at mast...

Adafruit code for the Nordic nRF52 BLE SoC on Arduino - Adafruit_nRF52_Arduino/libraries/InternalFileSytem/examples at master · adafruit/Adafruit_nRF52_Arduino

cedar mountain
severe latch
#

Oh okay great ! Thank you EdKeyes.

deep steeple
#

I recently came into possession of a bag of random electronic bits and bobs one of which was a Giant Plus 2.5" LCD Screen (LM1322A02-1B) is there any place to find a control board/adapter board for that kind of thing or is it not really worth trying?

cedar mountain
#

If it's exactly what you need for a project and you can't find any other displays that would suit, you can probably find a driver board for it. However, for the same amount of money and less effort you can probably just buy a new display which is closer to what you actually want and comes with full documentation and tutorials. (You might be able to tell that I'm not a fan of dumpster-diving for electronics, heh heh.)

deep steeple
autumn timber
#

Hello, I´m doing a project where you use a fingerprint sensor to open a door using a solenoid lock and a fingerprint sensor and for a safety measure i´m also using a keypad 4x4 and I was wondering if by code you could block the fingerprint sensor and use the keypad

cedar mountain
sacred ivy
#

I always come back to this out of curiosity but is there a 32 Bit processor that Arduino supports and is in a TQFP package? Preferably in a 32 pin package as well. Im not too familiar with the Arduino eco system.

livid osprey
sacred ivy
livid osprey
leaden walrus
#

^^ digikey search for 32 bit / 32 pin TQFP / available

#

samd21 would be a good basic choice unless you have some specific requirements

sacred ivy
#

Nah, more of a curiosity thing. I always like to compare things

livid osprey
sacred ivy
#

So, I wonder if they will start supporting Microchips PIC32CM line (which uses Cortex M0+). I just got an email about it today, hence why I was curious about whats out there for 32 bit support. I always like integrating "naked" uC's in my designs due to size.

#

For the price of their "Curiosity Board" I was also wondering what boards were around the same price. I know with Arduino I'll easily get more community support but with PIC, Im kind of on my own 😅

livid osprey
#

I'm sure if this line takes off, someone will eventually write an Arduino core for it. Seems possible, but someone will have to invest the time to do so. Kinda nice to see a 5V 32-bit MCU, something that has been missing in the present-day MCU ecosystem...

#

Flash is pretty small, but the peripherals look pretty appealing...

sacred ivy
#

Yea I had a quick look and the one thing that sticks out to me is a built in Quadrature encoder

#

Microchip was always good with their peripherals

severe latch
cedar mountain
severe latch
#

Not at all ! I appreciate you for sharing your thoughts with me

#

Still need to figure out how to append to a file though haha

severe latch
#

Any suggestions how to log data on feather nRF52 without using external SD card ?

cedar mountain
stable forge
sacred ivy
stable forge
#

seems low compared to SAMD21 to me. I looked at these originally from a CircuitPython point of view, and that doesn't work at all.

#

maybe pricing is good

sacred ivy
stable forge
#

SAMD21 is really minimal for circuitpython, and that's 32kB and 256kB

sacred ivy
#

Thats why I figure the arduino core would be good

stable forge
#

it will be intresting - should be a relatively easy port

sacred ivy
#

A little higher priced for the board compared to most

#

I guess the main question is: What else is around that price point to make it worth it and is already supported? the IC is $3 each.

stable forge
#

yes, are they trying to switch people off of SAMD, or off of PIC32?

sacred ivy
#

Or break into the SAMD market more

#

My only grievance with microchip is that I wish their products were supported more with open source stuff. But thats not their fault. I do wish I had the time and knowledge to port the few PICs I use over to Arduino.

north stream
#

That's why I abandoned PIC for AVR.

sly scarab
#

Hi everyone I just bought a 8 channel sunfounder relay board and it appears that setting the pin connected to one of the relays is what turns the relay on

#

Does anyone know why it’s low and not high to turn on the relay?

rough torrent
#

Maybe the relay for some reason is pulled high by default? Or maybe you are connecting to the NC and COM terminals?

sly scarab
#

I’m not sure because I thought low would mean 0 a volt output and the other pins for the relays do not have a connection at all and they’re still off

heady wharf
#

hey, what URL do i add in the board manager in the arduino IDE to get the latest ESP32 board? Version 2.0.2

wraith current
heady wharf
#

@wraith current yeah thanks, figured out i needed to delete my old 1.0.6 version otherwise it didnt work

north stream
# sly scarab Does anyone know why it’s low and not high to turn on the relay?

There are a few possible reasons. In the old days, TTL logic could pull low with more current than it could pull high. Also, open collector (and open drain) output gates can only pull low. It avoids issues with different supply voltages as well, and there are some situations where it's just more practical to pull to ground than to some other voltage.

proper forum
#

The microchip page for the itsybitsy m0 chip seems to suggest there are up to 6 uarts available on the m0, how would I go about accessing these through the Arduino Environment?

#

Additionally if anyone has experience interfacing the tbs crossfire nano rx with an arduino any tips/resources would be appreciated

proper forum
#

Does it require changes to adafruit-samd-1.7.9⁩ ▸ ⁨variants⁩ ▸ ⁨itsybitsy_m0⁩ ▸variant.cpp?

true spear
#

@proper forum You might try the Adafruit forums to get an answer in more detail.

proper forum
#

Just found this which might be useful

cold lagoon
#

Hi im just playing around with some NRF24L01 and i wonder why i only receive ReceivedMessage[0] and instead of ReceivedMessage[2] just 0?
And also what those numbers (marked in red) are for?

1.png
livid osprey
cold lagoon
#

ahh thank you

neon cobalt
# 
int redPin=8;
int greenPin=9;
int bluePin=10;
String myColor;
String msg="What Color do You Want?";
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(msg);
  while (Serial.available()==0) {
    
  }
  myColor=Serial.readString();
  Serial.println("working pls");
  Serial.println(myColor);
  if (myColor=="red"){
    Serial.print("worked");
    digitalWrite(redPin,HIGH); 
    digitalWrite(greenPin,LOW); 
    digitalWrite(bluePin,LOW); 
  }
  if (myColor=="green"){
    Serial.println("green chosen");
    digitalWrite(redPin,LOW); 
    digitalWrite(greenPin,HIGH); 
    digitalWrite(bluePin,LOW); 
  }
  if (myColor=="blue"){
    Serial.println("blue chosen");
    digitalWrite(redPin,LOW); 
    digitalWrite(greenPin,LOW); 
    digitalWrite(bluePin,HIGH); 
  }
  if (myColor=="off"){
    Serial.println("off chosen");
    digitalWrite(redPin,LOW); 
    digitalWrite(greenPin,LOW); 
    digitalWrite(bluePin,LOW); 
  }
}

when i run it and type in my serial monitor, for example "red", it would say "working pls" and the word the person entered "red", but nothing happens, because nothing is printed inside the if statement. Why is this not working. No errors, and i made sure to type in all lower cases.

stoic scroll
#

Hi all, I am trying to use a NeoPixel Led instead of blue led on the Feather nrf52840 to blink when scanning and stay blue on when connection is made. I am using Bluefruit.connected() to manually do this in a loop. I am wondering if the API provides a better way to do this using callback function.

cedar mountain
proper forum
wraith current
#

@proper forum woah. Couldnt figure out if I was in adafruit, Arduino, or Bardwell discord for a sec.

smoky sun
#

Hello yall, I'm working with this lilygo t2 esp board that has a built in 1331 display and sd card. I can't seem to get both working simultaneously. Appreciate any feedback.

#

My sample code

#

When I initialize the SD card with simple SD.begin it works but the display doesn't. If I try specifying the CS pin on SD.begin it stops working but the display starts working.

#

I see in the pinout diagram the display and sd share a few pins, it it possible to still use these at the same time?

cedar mountain
#

Yeah, the schematic seems to use a completely different set of pins for the SD Card.

Screen_Shot_2022-02-11_at_8.20.43_AM.png
smoky sun
#

Interesting, I'll take a look at the schematic and try adjusting the pinouts. Thank you!

lunar patio
#

Hello! I’m currently making my own MIDI controller out of old organ pedals using my own fork of Gustavo Silviera’s widely used code. It has 12 foot switches which are normally open, and there will be 3 additional buttons that are normally closed (NO stomp switches are rare and expensive). Would anyone be willing to show me how to set certain pins to have an inverted output in the code?

#

I’ve tried experimenting in the B_BUTTONS and Z_SETUP tabs to no avail. The pins in question would be A0, A1, and A2

wraith current
#

@smoky suncan you go back and forth between the display and the sd card ? eg. can you display something, then breakdown the display connection, then start the sd connection. does the image remain on the display when doing this ?

proper forum
#

My ItsyBitsy M0 is giving me weird behaviour. When I run it off battery (6v from ESC on BAT pin) it seems to hang, not reading rc inputs but still producing a valid PWM signal for the esc and steering servo. It's not until I plug it into my computer (while still on battery) and unplug it until it starts working as expected. Are there any ideas why this could be happening?

#

The code does use Serial and Serial.print/ln/f but I don't have any while(!Serial) in my code

#

would the behaviour be a result of an exception in the code?

cedar mountain
#

You might need to do something likec if (Serial) Serial.printf(...);

proper forum
#

still the same behaviour

#

It's weird because it seems like it's kind of functioning but won't read the RC input

#

it's hard to debug since I want it to work ideally with no usb connected at all

#

could it be a power issue, or resource allocation issue?

#

On the itsybitsy I'm using 2 PWM outputs and a 420,000 baud UART on SERCOM 3
Update: Maybe changing from 400k baud to 420k did some magic? That or charging the main nimh battery a little more

pine bramble
#

The baud rate chosen may be too ambitious.

proper forum
#

I don't get to choose the baud rate, it's the rate my rc receiver outputs

elder hare
#

im using ESP32, is it better to use AsyncWebServer then WebSocketsServer ?

safe shell
#

depends on the use case, they use different prorocols

proper forum
elder hare
#

@proper forum thanks for that info

safe shell
#

you might want to look at MQTT also

elder hare
#

@safe shell ill do that

proper forum
cedar mountain
proper forum
#

it's possible

#

maybe the OSD doesn't like drawing more than 1 line at a time

#

will have to look into it

quaint cloak
#

is it possible to send files using lora connected to arduino and sd card module?

proper forum
quaint cloak
#

Sorry how do I do that?

#

for the messages it looks like this

uint8_t data2[sendingData.length()];
sendingData.toCharArray(data2, sendingData.length());
rf95.send(data2, sizeof(data2));
rf95.waitPacketSent();
#

but how do I change it for a file

safe shell
#

small files I hope 😉

cedar mountain
#

LoRa packets have a maximum length, so for a file of any significant size, you're going to have to invent a protocol to split up the file, probably sending it with a header like "part 1 of 12" or something like that so the other side can correctly reassemble it.

safe shell
#

252 bytes I think

quaint cloak
quaint cloak
cedar mountain
quaint cloak
#

I'm reading from the sd card using the sd card library

cedar mountain
quaint cloak
#

thank you very much!

quaint cloak
#

btw, if I'm using multiple spi devices, what would I need to change to enable for two of them to function at the same time?

cedar mountain
#

They would need separate chip-select (CS) pins, which you would specify in initializing the SPI device. They wouldn't technically function "at the same time" on the same bus, but you can access them both in your code.

quaint cloak
#

thanks

#

sorry for another question

#

but how would I be able to split files?

quaint cloak
#

I mean in the 256 bytes

cedar mountain
#

You can use the length parameter to only read pieces of it at a time.

quaint cloak
#

oh wait

#

myFile.read(252) but how would I read the beyond 252?

cedar mountain
#

It keeps your position in the file, so the next read() call would continue from where it left off.

#

You can also use seek() to jump to a particular position if you need to.

quaint cloak
#

thanks!

ashen drum
#

does anyone have experience with gyros and soundmodules like the DFPlayerMini? I want to buil the sound Module for a lightsaber, but i´ve never worked with anything like an arduino before. Now i have a Nano 3.0 and the other two parts. Any help would be great

severe latch
stable forge
#

the advantage is that it is just a pass through from USB Mass Storage, since the host knows how to deal with FAT

pallid grail
#

@leaden walrus Ping me when you're around. I am confused about a thing. I'll ask Limor if she shows up, but she's not around yet, so I figure ask you if you show up before she does. I'm sure I'm missing something incredibly obvious, but I'm not going to waste any more time on looking for it.

leaden walrus
#

@pallid grail ping

pallid grail
severe latch
pallid grail
#

Or is it simply doing math in the example?

leaden walrus
#

from the base class

pallid grail
#

OH SERIOUSLY?! I searched through that multiple times.

leaden walrus
pallid grail
#

Thank you. Sorry. Heh.

leaden walrus
#

^^ that's where the inheritance is set up

pallid grail
#

I knew it was using the other lib

#

But I searched in the other lib too and came up empty

leaden walrus
#

how'd you search?

pallid grail
#

find in page in the browser.

#

It's not filtered down to "whole words" or anything.

#

so I don't know why it didn't pop on offset.

stable forge
pallid grail
#

Been working for finding everything else I've been looking at, so who knows.

leaden walrus
#

yah. weird. you were searching 343 not 375?

stable forge
#

in practice I have not actually heard of anyone wearing out internal flash on our microcontroller boards. But often for logging large amounts of data they will use an SD card

pallid grail
#

Yeah... wait... I was searching something other than 375, but now I'm wondering if there's another 34x one, and I search that. 345 maybe.

#

Oops. That's probably it.

#

I was looking at 345 I bet.

#

Which also uses 343 I bet.

#

hmm maybe not.

#

But still, no offsets in that.

#

So yeah. I was in the wrong lib.

leaden walrus
#

oh well. explains it at least. yah, there are several 34x libs

pallid grail
#

The CP 34x library starts with 345, so I assumed that's what this was using.

#

Mah bad.

#

Thank you for getting me past my facepalm.

leaden walrus
#

np

severe latch
waxen hawk
#

Hey could I get advice in writing for spi protocol. I’ve read the data sheet on what registers to clear,set, and to retrieve and send data. I am not sure how to initiate communication with secondary or “slave” device (don’t know if it is still appropriate to use that term) because I cannot find sample code for initializing protocol.

livid osprey
white bloom
#

Hi everyone,

I'm attempting to put together a voice modulator roughly using this guide: https://learn.adafruit.com/wave-shield-voice-changer. I've also been using a couple of YouTube videos for reference/sanity checking: https://www.youtube.com/watch?v=YNH4lx5vKac https://www.youtube.com/watch?v=ivkczjoOXHc. The main differences to the guide being using headphones (for testing) and I'm powering the whole thing off of a 9v battery.

I've put it all together today, but can only hear a buzzing/interference sound. I'm pretty sure I've assembled the shield correctly as adjusting the volume pot adjusts the output volume, and adjusting the pitch pot does change the pitch of the output. I'm just not getting anything that sounds like the sounds in the room from the microphone. Touching the silver circular section of the microphone also changes the sound of the output too, so it's getting something from it at least. Below are some photos of both sides of the shield and a video with the sound - ignore the pop at once point, that is from the amplifier it's plugged into. Do let me know if you'd like to see close ups of any of the wiring! Oh, it's not really an issue for me either but for some reason neither of the LEDs are lighting up either. I didn't find any information about what voltage was recommended for those though so not really surprised, but would be nice to fix if possible!

https://i.imgur.com/auOfpDK.jpg

https://i.imgur.com/auOfpDK.jpg

https://i.imgur.com/pEFCyWq.mp4

Thanks for your time!

Imgur
waxen hawk
livid osprey
# waxen hawk Oh thanks. But I am going to do with pure C without using any libraries. it seem...

Oh, are you looking to build an SPI application in C? https://en.wikipedia.org/wiki/Serial_Peripheral_Interface#Operation has the typical sequence of data transfer over SPI. The general flow of things is the chip select for the target device is brought low, then the clock begins pulsing for bidirectional data transmission.

Serial Peripheral Interface

The Serial Peripheral Interface (SPI) is a synchronous serial communication interface specification used for short-distance communication, primarily in embedded systems. The interface was developed by Motorola in the mid-1980s and has become a de facto standard. Typical applications include Secure Digital cards and liquid crystal displays.
SPI d...

waxen hawk
#

The wikipedia explains how the protocol works but not necessarily how to do it c-wise. I guess there's bit banging code but I don't want to do that.

livid osprey
livid osprey
white bloom
#

Hopefully that won't have broken anything

waxen hawk
sage wyvern
#

Hi

white bloom
#

Anyone know any good 3D printable arduino cases that have room for some extra shields and bits on top but are still enclosed?

vivid rock
#

are you talking about arduino uno formfactor?

white bloom
#

yeah

#

with ~30mm clearance on top

vivid rock
#

I'd search thingiverse. This, in particular, looks promising: https://www.thingiverse.com/thing:64008

Arduino OpenSCAD mounting library (v2.0) by kellyegan

This is a library of OpenSCAD modules for mounting Arduino boards. It has modules for creating enclosures, bumpers, mounting holes, punch out holes for jacks like USB and power and board dimensions. If you are making a custom enclosure or are mounting an Arduino board to a larger project this should make it easier.
Included is an example scad fi...

white bloom
#

Had a look there, but the thingiverse search algorithm is crap

#

thanks!

vivid rock
#

yes, it is 😦

#

this might also work: https://www.thingiverse.com/thing:1673549

Arduino + Motor Shield Enclosure by LoboCNC

This two-part enclosure houses a battery pack and Arduino + motor shield board stack. Designed for student robot design projects, it gives you access to the motor screw terminals while keeping the rest of the electronics protected. The board stack screws to the lower half, which holds a 6 AA cell battery pack. The top cover snaps into place. ...

white bloom
#

That looks pretty good

#

Think I might make a custom lid for this that has the room I need actually

#

Should be able to use the stock base and then use the lid measurements to make my own version

bronze crane
#

Hey everyone! I need some help to get AC current readings with ACS712, ADS1015 and ESP32 microcontroller. I am not getting expected current values.

My Connections:
ACS712:
Vcc: 3.3v
GND: GND of ESP32
OUT: A0 of ADS1015

ADS1015:
Vdd: 5v (ESP32's Vin Pin)
GND: GND of ESP32
SCL: GPIO22 of ESP32
SDA: GPIO21 of ESP32
ADDR: GND Pin of ADS1015
ALRT: No connection
A0: Output of ACS712

ESP32's GPIO35 is connected to OUT of ACS712.

Here's my Code: https://pastebin.com/N7RcFXR0

If I connect a 200W bulb I get current to be just 0.12A instead of about 0.8A

Outputs:

// Without any load
Current: 0.00
AIN0: 535  1.61V
ESP32_AIN0: 1866  0.00V

// With 200W load
Current: 0.13
AIN0: 516  1.55V
ESP32_AIN0: 1820  0.00V
Pastebin
#include #include Adafruit_ADS1015 ads; - Pastebin.com

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

#

If I connect both ADC & Current sensor boards to 5v I get 0.3A

elder hare
#

So i have 2 led strips connected now! if they both are running the same pattern they share "settings" but if i make 1 take "Solidcolor" and the other "TheaterChase" it works fine! what am i doing wrong? is it because im not making a "new class object" since they share or what is going on?

i want to be able to set same pattern on 2 strips and have them NOT share settings

my entire project : https://github.com/MythicalForce/MNC/

files controller settings and ofcourse main.cpp

GitHub
GitHub - MythicalForce/MNC

Contribute to MythicalForce/MNC development by creating an account on GitHub.

livid osprey
livid osprey
#

I don't know if you have independent pointers for pattern and settings, but if you're putting your settings pointers in your patterns, you may end up with two patterns that overwrite each other's settings pointers.

elder hare
#

@livid osprey

std::vector<Settings> settings { {}, {}, {}, {}, {}, {}, {}, {}, {} };

    #if NUM_CHANNELS >= 1
    strand1.updatePatternSettings(*strand1_cled, settings[0]);
    #endif
    #if NUM_CHANNELS >= 2
    strand2.updatePatternSettings(*strand2_cled, settings[1]);
    #endif
    #if NUM_CHANNELS >= 3
    strand3.updatePatternSettings(*strand3_cled, settings[2]);
    #endif
    #if NUM_CHANNELS >= 4
    strand4.updatePatternSettings(*strand4_cled, settings[3]);
    #endif
    #if NUM_CHANNELS >= 5
    strand5.updatePatternSettings(*strand5_cled, settings[4]);
    #endif
    #if NUM_CHANNELS >= 6
    strand6.updatePatternSettings(*strand6_cled, settings[5]);
    #endif
    #if NUM_CHANNELS >= 7
    strand7.updatePatternSettings(*strand7_cled, settings[6]);
    #endif
    #if NUM_CHANNELS >= 8
    strand8.updatePatternSettings(*strand8_cled, settings[7]);
    #endif
modern nexus
#

Would anyone know how to convert a sketch written for RGBW neopixels to RGB only? I've managed to get it working on the RGB pixels but it's very dim and I don't know what needs to be edited to change the brightness. https://github.com/LuckyResistor/CandleDecoration/blob/master/CandleV1.ino

GitHub
CandleDecoration/CandleV1.ino at master · LuckyResistor/CandleDecor...

The firmware for a simple RTC based candle decoration light, using Trinket M0, DS3231M RTC and a Neopixel ring. - CandleDecoration/CandleV1.ino at master · LuckyResistor/CandleDecoration

livid osprey
# modern nexus Would anyone know how to convert a sketch written for RGBW neopixels to RGB only...

There are a lot of RGB-to-RGBW conversion functions and libraries out there, but the reverse isn't as common. The primary reason for this is the colorspace for RGBW is much larger than that of RGB, so your colors may change in the process of downgrading to RGB.

That being said, if you're not super selective with your colors, you can certainly mess around with a formula you like. The process of converting RGBW to RGB would likely look something along the lines of defining a function that takes your RGBW input and converts it to an RGB output. Then, whenever your code calls for an RGB color, you can call rgbw2rgb(color), or whatever you decide to name it.

The conversion function itself, on the other hand, is something you may have to experiment with a little. I'll throw a haphazard basis-less pseudocode function for you to look at, so you can design your own conversion function to look the way you want...

uint32_t rgbw2rgb(uint32_t rgbw)
{ 
  uint8_t rIN = (rgbw >> 24) & 0xFF;
  uint8_t gIN = (rgbw >> 16) & 0xFF;
  uint8_t bIN = (rgbw >> 8) & 0xFF;
  uint8_t wIN = rgbw & 0xFF;

  float whtRatio = 0.5;
  uint8_t rOUT = (rIN + (wIN * whtRatio))/(1+whtRatio);
  uint8_t gOUT = (gIN + (wIN * whtRatio))/(1+whtRatio);
  uint8_t bOUT = (bIN + (wIN * whtRatio))/(1+whtRatio);
  
  uint32_t rgb = (rOUT << 24) + (gOUT << 16) + (bOUT << 8);
  return rgb;
}
modern nexus
rough torrent
#

CRC32 is 0xCB05543B
Took 2.90s to parse 757.55 kB (average 260.77 kB/sec)

CRC32 is 0x3EF7AE42
Took 0.70s to parse 173.47 kB (average 246.05 kB/sec)

anyone have any ideas on how to speed up reading? ESP32 reading off Adafruit breakout board connected to SD card at 10MHZ spi clock with SdFat (anything above doesn't work presumably cause of my breadboard spaghetti wiring)
it's reading byte by byte (although sd library should be buffering it with it's 512byte block buffer and i'm reading sequentially) and doing character comparisons to check for page boundaries for my "ebook" reader while also doing a CRC32 for it

cedar mountain
#

The first rule of performance optimization is to measure what's really going on. If possible you should try to profile pieces of the code to see what's taking up the majority of the time... could be the SD access, could be the per-byte read function overhead, or could be something in the page-boundary or CRC logic.

#

But as described you generally should be able to get pretty close to the underlying SPI speed minus a little file-system overhead, so maybe about 4x faster than you're seeing now.

hollow flint
bronze crane
elfin thorn
#

Quick question about the Clue and the digital GPIO pins... I see a bunch of analogue pins listed in the diagram, does that mean all other pins are digital? I'm trying to connect the Clue to a AS7265X Spectrometer (I2C) in which the additional Interrupt pin normally goes to Pin 3 on an Arduino. Thanks!

solemn cliff
#

you can tie your interrupt to any pin

elfin thorn
#

Groovy... Thank you!

severe latch
#

Hello everyone. I am trying to put my nRF52840 in sleep mode and I saw that there is the waitForEvent() function. However after going through several github discussions I couldn't figure out whether I should use this or not as many ppl claimed that it wasn't working for them but that was a few years ago

#

Is there any available documentation or reference for this ?

waxen hawk
#

If I connect a pull resistor to a pin, would that mean the digital signal is pulled up to be high or 1?

#

if I am sending a digital signal that is already low?

livid osprey
waxen hawk
#

I see so if I send a 0 through that pin, I would detect a high signal?

#

If i send a 1 through that pin, I would detect a low signal?

livid osprey
#

If 0 is logic high, yes?

waxen hawk
#

Yeah thats what I am asking. I guess that where I am getting confused

livid osprey
#

That is dependent on the translation of data to its bus architecture. For something like I2C, I believe that would be correct.

waxen hawk
#

I see in a lot of diagrams that they connect the pin to ground with a switch. Why is that? Is that necessary?

solemn cliff
#

a pull only pulls the line when you don't drive it, if you set the pin to 1, it will be 1, it you set it to 0, it will be 0, if you let it float it will be the pull value

livid osprey
#

While the switch is open, the node at the input pin will be "pulled" up to VCC, so the MCU sees VCC and understands that the switch is open.

While the switch is closed, the node at the input pin is shorted to ground, so the MCU sees 0V and understands that the switch is closed.

You can switch VCC and GND in this circuitry and the MCU will still be able to detect the state of the switch, but the logic may have to be inverted in software.

solemn cliff
#

having an external pull up like this is often not necessary, depending on whether the MCU has pull ups or not, but it can't hurt, and it alleviates the need to set an internal pull up

tardy zealot
elder hare
#

So i have 2 led strips connected now! if they both are running the same pattern they share "settings" but if i make 1 take "Solidcolor" and the other "TheaterChase" it works fine! what am i doing wrong? is it because im not making a "new class object" since they share or what is going on?

i want to be able to set same pattern on 2 strips and have them NOT share settings

my entire project : https://github.com/MythicalForce/MNC/

files controller settings and ofcourse main.cpp

GitHub
GitHub - MythicalForce/MNC

Contribute to MythicalForce/MNC development by creating an account on GitHub.

cedar mountain
stable forge
elder hare
#

of each pattern class or?

elder hare
#

@stable forge

stable forge
#

could you point to the animation code in that repo?

elder hare
stable forge
elder hare
# 
#if NUM_CHANNELS >= 1
  CRGB _leds0[Config[DEVICE].NUMLED[0]];
  CLEDController *strand1_cled;
  LEDController strand1;
#endif

#if NUM_CHANNELS >= 2
  CRGB _leds1[Config[DEVICE].NUMLED[1]];
  CLEDController *strand2_cled;
  LEDController strand2;
#endif
#

yes i have separate

#

@stable forge this is from controller.cpp

Solidcolor solidcolor;
TheaterChase theaterchase;
Juggle juggle;
RunningLights runninglights;
Cylon cylon;
Mitosis mitosis;
Twinkle twinkle;
ColorStacking colorstacking;

Pattern *currentPattern[] = { &solidcolor, &theaterchase, &juggle, &runninglights, &cylon, &mitosis, &twinkle, &colorstacking };

void LEDController::updatePatternSettings(CLEDController& c, const Settings& s)
{
  currentPattern[s.PatternActive]->setSettings(s);
  currentPattern[s.PatternActive]->draw(c);
  currentPattern[s.PatternActive]->update(c);
  currentPattern[s.PatternActive]->ChangePalette();
}
stable forge
#

you will need theaterchase1 and 2 if you want them to run simultaneously

#

or for any case where two identical animations are running simultaneously. You might have a complete set of instances of each kind of animation for each strip, and store the set in a struct, say, and then make an array of those structs that is as long as the number of strips

#

that is the way to general this to n strips with any combination of animations

elder hare
#

@stable forge tell me if im wrong here...

take the Solidcolor pattern

class Solidcolor : public Pattern
{
public:
    virtual void draw(CLEDController& c)
    {
        CRGB* leds = c.leds();
        int size = c.size();

        fadeToBlackBy(leds, size, 255);

        for(float i = 0; i < size; i++)
        {   
            DrawPixels(c, i, 1, PaletteMode(c, i, PatternBrightness));
        }
    }

    virtual void update(CLEDController& c)
    {

    }
};

here we set public Pattern that in turn has public Settings

should i not add Settings& s to the draw function? so that it takes the current strip selected settings like so

virtual void draw(CLEDController& c, Settings& s)

?

#

so that i would call s.PatternBrightness in

DrawPixels(c, i, 1, PaletteMode(c, i, PatternBrightness));
stable forge
#

did you write all this code, or are you adapting it?

#

this is quite a complicated program to build from scratch

#

there are existing libraries in Arduino or CircuitPython that would make this easier

elder hare
#

i wrote it with some help @stable forge

#

or rather i rewrote my entire code with some help 🙂

stable forge
#

being constructively lazy is a programming virtue 🙂

rough torrent
# cedar mountain The first rule of performance optimization is to *measure* what's really going o...

I did some profiling by setting up bool and unsigned long arrays and whenever I entered a section of code, I would set a value in the bool array to true and false when I exit the block. An interrupt will periodically check the bool array and if any of them are true it increments the corresponding value in the unsigned long arrays. Then at the end I print some very pretty stats 😁
(mostly based on the ideas from https://www.dudley.nu/arduino_profiling/)

End profiling
Profiler period: 250 microseconds
Profile time: 4957 milliseconds
Total section hits: 19831
Section hit distribution: 
 -1 UNPROFILED 6777 (1693.99 milliseconds - 34.17%)
  0 FILE_READ_NEXTBYTE 9730 (2432.13 milliseconds - 49.06%)
  1 CRC32_UPDATE 3311 (827.62 milliseconds - 16.70%)
  2 FILE_READ_SLASH_N 0 (0.00 milliseconds - 0.00%)
  3 SERIAL_PRINT 13 (3.25 milliseconds - 0.07%)
Last page is 898
CRC32 is 0xCB05543B
Took 5.29s to parse 757.55 kB (average 143.23 kB/sec)

(I definitely did not spend 30 minutes making the stat printing look good)
Pretty sure the UNPROFILED parts are from the profiler itself and we lost about 100kb/sec speed from profiling lol
So it is mostly the FILE_READ_NEXTBYTE then
Any ideas??? I looked at the SdFatConfig.h file and don't see anything I can do besides #define SPI_CLOCK SD_SCK_MHZ(10)

cedar mountain
#

Is there a different SD function call you can use to read like a block-sized buffer at a time, and then loop through it in your own code? That may be more efficient.

waxen hawk
#

Do anybody have suggestions of how to connect wires to gold fingers without soldering them?

cedar mountain
#

Tiny alligator clips, maybe?

stable forge
dense rain
#

Hey what is the most basic adruino I need for decent neopixel control and also some slight more advanced ?

pine bramble
#

@dense rain If you go AVR you get an 8-bit system and very low memory.

dense rain
#

AVR?

pine bramble
#

All 32-bit processors exceed AVR is pretty much all categories.

#

328p and 32u4 are both AVR

dense rain
#

sorry a little new to this

#

what is AVR?

pine bramble
#

google is your friend?

dense rain
pine bramble
#

avrfreaks.net is a webbed forum

dense rain
#

So will any adruino board do its just the mircocontroller that matters?

pine bramble
#

The advantage of the Uno R3 (flagship Arduino AVR board) is that there are many projects for it.

#

You don't have to go with an Arduino branded board.

#

You're better off downloading the Arduino IDE first and then installing boards into it.

#

That'll give you an idea of the tremendous breadth of the boards that are supported.

dense rain
#

Ahhh okay yeah ahah thats why I was considering using one since they seemed pretty well supported

#

Alright thank you so much!

pine bramble
#

Basically if it's capable of being programmed by the Arduino IDE it's probably been formally ported into it.

#

You're welcome.

#

Try to get at least one Uno form factor with all those pins.

#

Metro M0 Express is fine.

#

If you really want AVR compatibility there's a Metro 328p I think.

#

The female pin headers on that style board are very easy to hook stuff up to.

dense rain
#

Awesome tysm for you help 😄

gloomy sandal
#

Hey,
I need some help with NRF24L01. I have a module that I want to use as a base and with which two others should communicate. The base should only receive and the other two should only transmit. When one module sends to the base, the LED on pin D11 should light up and when the other module sends, the LED on pin D12 should light up. I have written some code for the base, which partly works. The LED at D12 can be controlled from other Arduinos, but both sending modules control the LED at D12, even though I have assigned one module to D11. for the code, I have used the code from https://howtomechatronics.com/tutorials/arduino/how-to-build-an-arduino-wireless-network-with-multiple-nrf24l01-modules/ as a guide. Can anyone help me? (and how do I send codes here without cluttering up the whole chat?)

How To Mechatronics
Arduino Wireless Network with Multiple NRF24L01 Modules

In this tutorial we will learn how to build an Arduino wireless network, composed of multiple NR24L01 transceiver modules.I made a network...

elfin thorn
#

Good morning all! I've been playing with the AS7265X spectrometer on my Clue and though I have much to learn, it's pretty cool. I'm getting data in both the Serial Monitor and the Serial Plotter, but no matter what I do, I can't get it to print on the Clue screen. I've tried using the Arcada Simplest sketch to integrate, I'm still such a noob at this, but can anyone help?

The code for the AS7265X is as such (removed beginning comments to save space):

📎 message.txt
cedar mountain
gloomy sandal
#

it is not that long, each code has about 30 lines

lean jewel
#

Hello, I am going to use Arduino Uno Wifi Rev2 to program an external ATMEGA4809 microcontroller using Arduino IDE. However, I’ve used more than 13 digital and 6 analog pins used in Arduino. Thus, I need to define pins as ports specified at ATMEGA4809 datasheet (e.g. PA6, PC4 etc.). How can I achieve that? Thank you.

north stream
# lean jewel Hello, I am going to use Arduino Uno Wifi Rev2 to program an external ATMEGA4809...

There seems to be an Arduino package available for it: https://forum.arduino.cc/t/megacorex-arduino-support-for-atmega4809-3209-1609-809-and-4808-3208-1608-808/629534

Arduino Forum
MegaCoreX - Arduino support for ATmega4809/3209/1609/809 and 4808/3...

Arduino support for ATmega4809, ATmega3209, ATmega1609, ATmega809 and ATmega4808, ATmega3208, ATmega1608 and ATmega808 GitHub - MCUdude/MegaCoreX: An Arduino hardware package for ATmega4809, ATmega4808, ATmega3209, ATmega3208, ATmega1609, ATmega1608, ATmega809 and ATmega808 The new megaAVR-0 series (used by the Uno Wifi Rev2 and the Nano Ever)...

pine bramble
#

I'm not sure if this question belongs here or in Projects -- sorry for the cross-post:
I'm building something that will live in a museum/gallery space that will use a Trinket-powered capacitive touch switch. My first build used an old-school 5v Trinket. It worked well, but I'm pretty sure it caught a static shock during testing that fried the Arduino. I've ported the code to Circuit Python and have rebuilt it with a Trinket M0 using the built-in capacitive touch system.

Does the M0 already include some sort of robust static discharge protection on the board? Or is the official advice to look into building something clever to catch surges (with reverse-flow through a diode to ground, for example)? Once shipped it will be EXTREMELY DIFFICULT to replace/repair these parts. Pls advise.

vivid rock
#

as far as I know, M0 trinket - as well as any other Adafruit boards - do not have any ESD protection. So I would advise you to add a TVS diode; they are cheap

severe latch
#

systemOff will cause the CPU to hibernate and can only be woken up using a GPIO pin which I am guessing is the uint32_t pin

#

what about the wake_logic ?

cedar mountain
ashen drum
#

I´ve just installed the MPU6050 on my arduino Nano (connections should all be right), but no matter which libray I use, im only getting zeros for all values (acceleration, angle, etc.). Does anyone here have experience with this module?

cedar mountain
severe latch
autumn timber
#

Can someone tell me how to solder leds to arduino?

livid osprey
autumn timber
#

@livid osprey I'm making a project for school which is a vault and I'm trying to use Led's to turn on and off when I want to and I would like to use them without a breadboard. If you need anything else let me know.

north stream
#

You can often solder an LED to a current limiting resistor and just plug them into the receptacles on an Arduino

livid osprey
autumn timber
#

Im using a Mega. It is not to solder directly to arduino, it is to use a resistor and also a jumper wire.@livid osprey

livid osprey
#

@autumn timber this is a great guide for anyone who's new to soldering. Try starting with this, and see how far you can get.

north stream
pallid grail
#

@leaden walrus I am tagging you in for help on a new Arduino template, for using a built in TFT display with Arduino. Feather TFT is the obvious starter, but there's also FunHouse and CLUE. So Limor asked me to template it. But I will need some help with the code. And probably explaining it, if I get into that. I'm running the CP Weekly meeting in half an hour, so I won't start this until that's done. Will you be around later?

leaden walrus
#

@pallid grail yep

pallid grail
#

Excellent. I'll ping you after the meeting. Thanks!

pallid grail
#

@leaden walrus Hokay, meeting and post-meeting whatnot done. I'm not really sure where to start with this or the template page (I haven't done Arduino pages all that much in general). I guess I need the code first to know what libs to suggest installing and so on. I assume it's supposed to be a simple example using the TFT in Arduino. Nothing else because it's destined for other boards that don't have all the same extra features. I'm also guessing the pins are different for each board, so the code would get submitted to Learn with placeholders, and the template would say to update the pins to match the board guide the page is going into.

leaden walrus
#

@pallid grail there all 3 different TFTs. so code would be different. some can be boiler plated using the pin defines. but things like library include would be different.

pallid grail
#

Oof. Right.

leaden walrus
#

how much info is going to be provided? "using" = ?

#

just a basic demo?

pallid grail
#

Yeah I think?

#

Wait...

#

If they're all different, then the template would end up being pretty significantly different...

#

Ugh.

#

Like, it would have to be made up of mostly template areas at that point.

#

Shrug. Limor asked for it, so I guess that's how it's happening.

#

Not sure she thought through the different libs for each.

#

But maybe I'm wrong on that. I certainly didn't, but I'm not her.

leaden walrus
#

they're all ST7789...which might help

pallid grail
#

Fair enough.

leaden walrus
# 
CLUE = ST7789 (https://www.adafruit.com/product/4520)
FunHouse = ST7789 (https://www.adafruit.com/product/4421)
Feather TFT = ST7789 (https://www.adafruit.com/product/4383)
pallid grail
#

Then how would the lib imports be different?

#

Since we aren't using other features with it....

#

includes whatever...

leaden walrus
#

they wouldn't in that case

pallid grail
#

Ah ok

#

Issue averted.

leaden walrus
pallid grail
#

Oh. Um...

#

Oof. Long. Yeah apparently? I should ask if that's what she wants or if she meant something similar.

#

asking now

leaden walrus
#

so maybe just init is all that would need adjusting? to set size

#

and also maybe rotation, etc.

#

but then there's the details like the powering and backlight

pallid grail
#

Right...

#

I mean, there are multiple templates with "template" code where you have to update stuff and then resubmit it to Learn.

#

So it's not a new idea.

leaden walrus
#

is there an existing guide this is planned to be added to?

pallid grail
#

But most of them are something like "update BUTTON_PIN to the button pin, and LED_PIN to the LED pin" not "Update these 10 things to match your board" etc.

#

The board guide, yeah.

#

For each of them eventually. But starting with Feather TFT.

leaden walrus
#

yah. looking at the guides now....

#

they cover general setup...but idea is to add more specific for TFT usage

pallid grail
#

The TFT Feather is also getting a "Factory Demo" page for Arduino that has the Factory test code. And it needs the Arduino Setup template page too I think.

#

Yes.

leaden walrus
#

clue/funhouse/feather - any others?

pallid grail
#

Limor didn't mention any, but that doesn't mean something wasn't left out. I can't think of any others...

#

So a board without the TFT_I2C_POWER pin would fail to compile if that bit is in there. Do I understand that right?

leaden walrus
#

yah. it'd just be like "what this?"

pallid grail
#

Got it

#

Same for backlite if it's not named that. Ok.... That's not as much needing updating as I was picturing. 6 lines it looks like.

#

No answer yet on whether this is the example to use.

#

Why is it in the ST7735 lib?

#

Seems an odd place to put it if it isn't using that library really...

leaden walrus
#

just historical

#

it was originally ST7735 only

pallid grail
#

Ohhhhh

leaden walrus
#

and changing repo name breaks tie in to arduino lib index

pallid grail
#

Wait. What's #include <Adafruit_ST7789.h> then? Part of the ST7735 or a new one?

pallid grail
leaden walrus
#

same lib

pallid grail
#

ah ok.

leaden walrus
pallid grail
#

Ahhhh.

#

Ok. I'm tracking again.

leaden walrus
#

there's another "name" that shows up in lib mangager

pallid grail
#

Huh, ok

leaden walrus
#

which at least reflects both STs

pallid grail
#

Yeah.

leaden walrus
#

but repo name sort of frozen

pallid grail
#

So search for ST7789 and I'll find it.

#

in the lib manager

#

in theory.

leaden walrus
#

breaks the plumbing. i think i did that at one point.

pallid grail
#

Heh got it

leaden walrus
#

there are ways, with preproc logic, to potentially make a single example

pallid grail
#

Oh. Hmm.

leaden walrus
#

but it sort of become messy/unreadable code

pallid grail
#

Will it be gnarly? Or..

#

Yeah that.

#

I mean, this is kind of that already to me 😄

#

But folks who are going to use this, probably not so much

leaden walrus
#

since it's only 3 boards, i'm thinking just add dedicated example, like there already is for feather.

pallid grail
#

Oh, so have one for each board to begin with? But what happens when a new board comes out? Going to have to be updated at that point anyway.

#

So having the placeholder version might be ok. Since it'll end up dedicated to each board at that point anyway.

leaden walrus
#

the other option is commented out stuff, with messages like " uncomment this for board x" etc.

#

also sort of messy

pallid grail
#

Right, but with instructions to delete unneeded bits, it won't be as messy in situ.

#

Also I'm kind of the only one dealing with this stuff, so while I try to write template instructions clear enough for others, it's also mostly for me in the end.

#

Though Anne has been using the CP templates lately to add them to older board guides.

#

Apparently I wrote them clearly enough.

leaden walrus
#

can you link to a CP example. might help if i read an existing template.

pallid grail
#

Oh, where there's bits to be changed?

#

Yeah hold on

#

That's a simple example, but the idea is the same.

leaden walrus
#

is there an example template page in learn where that's used?

pallid grail
#

Live or the template editor?

#

The code was submitted separately to Learn with the updated info.

#

I DM'd you the template editor link.

leaden walrus
#

cool. let me read those to get some context.

pallid grail
#

Sounds good

#

I ran that sketch, part of the last section is off the screen. I don't understand what's going on with the code well enough to figure out how to move it. Also the colors seem wrong... if I'm reading this correctly.

leaden walrus
#

yah, that example is 98% copy pasta.

#

written for a bigger TFT

pallid grail
#

Ah

leaden walrus
pallid grail
#

uff.

#

Kind of figuring out how to tweak the position of the elements in the last part.

#

A lot of trial and error, and then waiting for compile and the whole program to run to get to the end 🙄

leaden walrus
#

and for that touch example - what if i have a hallowing?

pallid grail
#

um...

#

Yay! Fixed the button position.

#

Colors still seem wonky to me

#

Getting picture

leaden walrus
#

If using a HALLOWING M0, update TOUCH_PAD_PIN to TOUCH1, and TOUCH_PAD_PIN_TWO to TOUCH2.

pallid grail
#

Oh...

#

I thought you meant the .ino

#

I don't explain all possible options

#

I explain 2 as an example.

#

Same with all the others.

leaden walrus
#

just another example of how it gets tough to make a universal example, that is also easy to read

pallid grail
#

Purple and cyan...

#

Code sez red green...

leaden walrus
#

could be something else from copy pasta

pallid grail
#

How?

# 
void mediabuttons() {
  // play
  tft.fillScreen(ST77XX_BLACK);
  tft.fillRoundRect(25, 5, 78, 60, 8, ST77XX_WHITE);
  tft.fillTriangle(42, 12, 42, 60, 90, 40, ST77XX_RED);
  delay(500);
  // pause
  tft.fillRoundRect(25, 70, 78, 60, 8, ST77XX_WHITE);
  tft.fillRoundRect(39, 78, 20, 45, 5, ST77XX_GREEN);
  tft.fillRoundRect(69, 78, 20, 45, 5, ST77XX_GREEN);
  delay(500);
  // play color
  tft.fillTriangle(42, 12, 42, 60, 90, 40, ST77XX_BLUE);
  delay(50);
  // pause color
  tft.fillRoundRect(39, 78, 20, 45, 5, ST77XX_RED);
  tft.fillRoundRect(69, 78, 20, 45, 5, ST77XX_RED);
  // play color
  tft.fillTriangle(42, 12, 42, 60, 90, 40, ST77XX_GREEN);
}```
#

That seems pretty clear to me color-wise anyway....

#

And the red and green work in that first bit.

#

i.e. show up red and green.

#

Note in the image, my fancy now-entirely-on-the-display-buttons... 😄

leaden walrus
#

yah! pr it

pallid grail
#

Oh, heh. Yeah that would be an idea, wouldn't it.

leaden walrus
#

so i'm still thinking a separate example for each.

#

mainly due to the power feature on the feather

pallid grail
#

hmm.

leaden walrus
#

otherwise it would be much more template-able

#

import lib. create instance with pins. call init with size.

pallid grail
#

hmm ya.

leaden walrus
#

and we could add #defs for width/height for built in display boards

pallid grail
#

oh at the beginning that get pulled in later?

leaden walrus
#

then you could tft.init(TFT_WIDTH, TFT_HEIGHT);

pallid grail
#

ya ok

leaden walrus
#

same code line for all

pallid grail
#

I like it.

leaden walrus
#

it'd be a core change though

#

for feather

pallid grail
#

Right, but I don't plan to use this example directly in the lib. I intend to submit it to Learn.

#

owait

#

I don't follow.

#

OH

#

You mean actually define pins for the board in variants

#

I thought you meant in the example.

leaden walrus
#

yah. same as TFT_I2C_POWER etc

pallid grail
#

Ok ok, I follow now

leaden walrus
#

if in the example, it gets back to comment/uncomment mess

pallid grail
#

Right. I mean, fact is, we have a lot of that in CP examples too. And in this case, everything not needed would be deleted before submission to Learn.

#

I'll see how bad it is trying to template the code before committing to dedicated examples.

#

No idea how long it would take to get new #defs merged in the ESP32 Arduino core. I don't know how responsive they are to PRs, even if they're tiny.

leaden walrus
pallid grail
#

Thank you, I was looking for that just now

leaden walrus
#

different core, since nrf for clue

pallid grail
#

I figured that would be the case

#

Ya

#

I was looking for the core

#

Google was failing me so far.

leaden walrus
#

those CP example are being collected in learn repo

#

in CircuitPython_Temaples

#

thinking of setting up similar for arduino?

#

or OK to just link to examples living in library repos?

pallid grail
#

Yeah, I'm thinking Learn. I guess I hadn't thought it out fully, and probably was thinking it gets added to the CP_Templates folder 🙄

#

I mean... it's ok to do lib ones, but if I'm making them boilerplate with things to be updated, probably don't want it in a lib.

#

Because it will be, in theory, a non-functional example as-is.

#

Can you do #defines in an example? Like variables in Python?

#

Eh, probably no point.

#

Uff, TFT_BACKLITE vs TFT_BACKLIGHT. WHY... lol.

leaden walrus
#

you can - it works more like a text search/replace, before compile

pallid grail
#

Ah

leaden walrus
#

xkcd_new_standard.jpg

pallid grail
#

😄 Yeah

leaden walrus
#

so that dotstar example is sort of intentionally broken?

pallid grail
#

Yeah, it's designed to be updated.

leaden walrus
#

board.TOUCH_PAD_PIN_ONE

pallid grail
#

Not run as is.

leaden walrus
#

no board has that

#

?

pallid grail
#

Exactly.

#

Requires updating to work on anything.

#

It's a method I came up with for template code. Working out so far, at least for me and for Anne.

leaden walrus
#

how long have those been published?

pallid grail
#

To the Learn repo? umm... I'd have to check. I don't remember when we started templating.

leaden walrus
#

"working" as in people are finding that approach understandable?

pallid grail
#

Yeah. Only people creating templates end up utilising that code.

leaden walrus
#

or just copy/pasting non-working code directly and then wondering what's up?

pallid grail
#

10 months ago for the cap touch.

#

Unless someone is going through the Learn repo to find code, users never see that code.

#

Only template page creators.

leaden walrus
#

oh. yah. cause you change it.

pallid grail
#

11 months ago for Digital Input. So... somewhere around a year ago is when I started posting code like that.

#

Exactly.

#

It's linked in the template areas where it's meant to be embedded, but it gets changed and submitted to Learn in a "Adafruit_Board_Name" folder before getting embedded in a guide.