#help-with-arduino

1 messages · Page 101 of 1

gilded swift
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We would just need to find what R1 is in a voltage divider equation

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Vout = Vin * R2/(R1+R2)

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Vout is 3.3V, Vin is 230V, R2 is 100ohm

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That gives us
3.3V = 230V * 100/(R1+100)

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Just solve for R1

brazen falcon
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What are you trying to accomplish?

gilded swift
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But I’d just use a transformer

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Like a 46:1 transformer with a full bridge rectifier and a 3.3V DC to DC converter to take the 5VDC out of the transformer to make 3.3V

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If I was designing a power supply of course

north stream
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Many simple power supplies use a lashup known as a "capacitive dropper" to reduce mains voltage to something that can power things like LEDs. It's more efficient than a resistive dropper. However, both capacitive and resistive droppers are "non-isolated", which means that anything connected to them is also connected to mains voltage: this should only be done in apparatus that cannot be touched while it is energized. These techniques also only work well in situations where the load is known and doesn't vary much, as the amount of voltage they drop depends on the amount of power consumed: consume less power and the voltage goes up. A transformer is safer for you (it provides isolation, avoiding shocks and fires) and safer for your equipment (its voltage drop does not vary nearly as much with changes in load current).

vivid rock
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If you want to power 3.3v electronics from 230v AC, then no, resistors are not the way to do it. If you only need a relatively low current (say, just to power an arduino), an easy and cheap solution would be to get a USB charger (from 220-230V AC) which gives you 5V DC, and then add a 3.3v voltage regulator

heavy star
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Might also be able to find a 3.3v power adapter, although I haven’t seen many

gilded swift
pine bramble
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230 VAC isn't hobby-level working environment.

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Generally you buy things that plug into that, and, ideally, have been approved for safety.

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(UL rated stuff is becoming harder to find!)

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30 volts is considered the electrocution hazard threshold. (<30V not usually a problem)

gilded swift
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i think the question comes down to should you, because you certainly can but you probably shouldn't

pine bramble
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We moved when I was not yet six years old and I'd already been electrocuted by then - unplugged a fish tank at a neighbor's. ;)

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After the first one I instantly recognized the feeling when I got the second one (quite a few years later).

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Cement floor basement, outlet wired incorrectly (I did nothing wrong/unexpected).

gilded swift
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whoops lol

pine bramble
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Several times on outdoor stages I've seen musicians touch a metal microphone/stand and let out a light yelp. ;)

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If I was the <gov't> I'd go into stores and pull goods off the shelf that are not UL rated, and let the industry respond to that pressure.

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It's ridiculous that there's no enforcement anymore.

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FWIW it's built well and would 'probably pass' a UL cert program, unmodified.

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Does have a CE mark iirc. /thread

livid osprey
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While UL is federally approved to perform safety testing, it is not a government entity, so requiring UL certification on every product in distribution is probably not enforceable. I would certainly hope every product has some official safety testing done, but UL is a private for-profit organization that certainly does not have to be the exclusive mark of safety on consumer goods.

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Main reason UL isn't as common as it used to be: They transitioned to a for-profit organization in 2012.

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CE is probably more common for consumer products, since it is legally required for most consumer electronics to be distributed in Europe?

pine bramble
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@livid osprey The rub I'm getting is that business practices were relied on in lieu of enforcement - it was always related to national fire codes.

pine bramble
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Right the CE mark in Europe - but it doesn't guarantee a whole lot.

midnight gulch
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UL is usually required if the item has a mains voltage attached power supply, it is there to try to make sure you are not liable to get zap by mains voltage due to bad design. CE is for electronics to built to a country specifications, a FCC is US for the device transmits something and could potentially interfere. RoHS is so kids don't lick them for the lead since it's supposed to be built without lead and other more toxic materials.

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We had to go through all the testing and such for some devices we wanted built here at where I work

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We got real familiar with the process

jagged haven
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Hey, everyone. I'm trying to fit an M4 Express and Prop-Maker FeatherWing into a 1" pvc pipe. This small space prevents me from powering them via the M4's JST port with my 3.7v 2200mAh battery. I've considered soldering a micro-usb cable to the end of the battery's cables and using that port instead, popping the JST port off the board and soldering my own longer cables to the pins left behind, and directly soldering the battery to the board itself. All of those seem like I'm asking for trouble. Any suggestions?

Relevant power management docs page: https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51/power-management#alternative-power-options-3016710-14

north stream
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I think those are all reasonable approaches. I'd probably lean toward using the micro-USB, since a) it's already there, and b) you can unplug it easily, but tack soldering wires to the JST connector pads would make sense too.

jagged haven
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If I went with the micro-usb approach, does it matter that the board would expect 5v and the battery would only output 3.7v? I’m guessing the board’s voltage regulator would sort it out but I want to make sure

north stream
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Hmm, good point: it might work, but I'm not sure.

jagged haven
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Ok, I’ll look for that answer and do the JST approach if not. Thanks for the help!

vocal quarry
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Hi all. Having some trouble getting this Adafruit SD card breakout working. I've tried it with the metro m4 in the attached picture and an old mega 2560. I tried two different SD cards formatted fat16 and 32. I've been using the Card info Arduino sketch. I set the chipselect pin to 10 I'm not sure what else could be keeping the card from being recognized.

IMG_20211022_202519.jpg
cedar mountain
vocal quarry
vocal quarry
pine bramble
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i am little bit scared... what is this...?

unknown-6.png
native dagger
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Incorrect baud rate usually

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It's way less scary than it looks

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Oh wait

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Hmm, I'd check baud rate for sure but it could be something else

safe crown
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question for the arduino + compiler pros here : I have custom arduino core for the SAMD51 (M4F) for a board that would be similar to the itsybitsy M4 for some of it. I'm currently on gcc 2017 and previously migrated the toolchain from 2014, also upgraded CMSIS to the latest adafruit version

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now using the 2019 gcc is attractive because I'm still saving 3% of flash but "nothing works". I have huge issues to boot the board, large incoherence in just accessing an array of uint32_t, returning crazy values. My SD card driver (custom) works and the board now boots after fixing a couple of SPI related issues but I'm wondering if the move to 2019 required other complicated things in the core, ld script (checked, no difference...) or code ?

safe urchin
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Does anyone else have issues with trying to connect to an arduino?

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I got an adafruit metro and I am trying to just connect to it but no luck.

cedar mountain
safe urchin
cedar mountain
safe urchin
livid osprey
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Just make sure you triple check the polarity before you connect your battery haha

jagged haven
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I actually just finished popping that port off and repurposing it into a connector like that. It all works but I’ll be ordering one of those soon

safe urchin
safe urchin
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@cedar mountain any idea what board I am suppose to use? A guide online said SAMD but I do not see the metro

cedar mountain
safe urchin
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Yeah I wish I could just search it on the board manager but sadly that is not the case

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sigh I needed to do the more board url thing

fickle cave
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Im trying to power a mosfet using my arduino uno r3(At high frequencies) I found a frequency library that works great, but it only outputs 2.4v when I need atleast 4 to toggle the mosfet gate

north stream
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The Uno R3 should output nearly 5V.

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You can, of course, build (or buy) a gate driver

fickle cave
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it is 5v when im not using the frequency changer code, but when I do it changes to 2.5

vivid rock
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if you output a 50% duty cycle pwm signal on a 5v pin, and measure the result using voltmeter, it will show about 2.5v

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in reality voltage oscillates between 0 and 5v, but too fast for a voltmeter to react to it

fickle cave
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Im oscillating at 60hz, use the voltmeter(ac) and it still measures 2.5, if I oscillate at 1hz and check it(with dc meter) it shows 2.5

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I also know that its not actually going from 0-5v because I had the mosfet working without the frequency changer code, but when added it doesnt work

vivid rock
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there is no way, as far as i know, of actually changing the voltage of output pins on Uno (assuming power supply provides enough current to feed it). All you can do in code - wharever library you use - is have the voltage switch between 0 and 5v

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so i would suspect somethingis wrong with the wayyou measure it

fickle cave
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fixed it lol

north stream
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pinMode()?

dull fjord
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I need some general help right now, then more specifics later. Here is the long and short of what I would like to accomplish. I would like a raspberry pi to wirelessly control multiple Arduinos. These Arduinos will be controlling light strips. Basically, one Raspberry Pi master, multiple Arduino (or other microcontroller capable of doing this) slaves. I would then like to be able to create a GUI on the Raspberry Pi to control the lights (via the slaves), and maybe even control the lights from my phone?? Does this system I have described even sound possible?

gilded swift
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Sure, set up ESP32 or ESP32-s2 microcontrollers with a web server on each with path based commands

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Then have the raspberry pi navigate to each ESP32’s address/path combo to send those web commands

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Also, for the sake of more inclusive terminology with your setup, try to use Main/Secondary or even primary and secondary. There is a push to move away from using master/slave in technical contexts

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Anyway, let me see if I can find a good guide on the Adafruit learning site

dull fjord
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Hmmm… I actually always did wonder how we were allowed to use master/slave anymore with today’s political movements. Okay, I will watch out for this in the future. That is just what I learned in college and am used to calling them, so forgive me if I forget and use it.

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In response to what you said, I’m interpreting that is I would need to have the program contact each individual microcontroller separately and send the command? No general “mass command” that any secondaries on that “frequency” would pick up and apply, similar to an infared setup?

gilded swift
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You could probably query the network in mass for 200 responses for <>.<>.<>.<>/path

dull fjord
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Could you find me any guides or examples where a main/secondary wireless setup using these chips was done that I could reference?

gilded swift
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Not yet. You might look at whippersnapper as an option

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Let me find that learn guide

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It would remove the Raspberry Pi aspect and provide a nice interface

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Plus no code 🙂

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Or minimal at least

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I’m not sure how you could do multiple on one instance but perhaps there is a way to control each instance with one dashboard

dull fjord
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But wouldn’t this limit me in how much I could have the secondaries (I.e. lights) have custom interaction with a program I develop? For example, I have an alarm clock programmed on my raspberry Pi, and I want the lights to slowly turn on before the alarm goes off. Would I still be able to do this with this type of control?

gilded swift
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Oh I see, perhaps there is a way to manage that. I’m not entirely sure though.

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So you could connect your wireless devices to Adafruit IO and send commands to your connected Adafruit IO devices

lone lantern
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what flash does the macropad have? trying to determine write cycles

solemn cliff
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it's in the 100 000

lone lantern
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that's plenty for basic settings, thanks!

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won't even bother wear leveling, praise be laziness

livid osprey
lone lantern
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now I want a regex part search

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looks like 100k is confirmed

solemn cliff
lone lantern
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both are min 100k

solemn cliff
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they might switch chips due to availability, but as far as I know they target 100k min

sage raven
leaden walrus
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looks pretty simple. how important is that form factor?

sage raven
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The smaller the better. I could always just cut out some strip board or something I guess

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Might also make a design & get some printed - I could see myself using them in a few applications where I need to power different sensors

lyric seal
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Can someone help me with the arduino uno connecting to the Bluefruit? This is how I have it connected but I’m using the Bluefruit UART LE friends and everything online is with the SPI. I’m using the only library you can find and I think I have it wired wrong and the code won’t factory reset

leaden walrus
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@sage raven if cutting up something existing is an option, checkout the various perma-proto boards:
https://www.adafruit.com/category/124
could cut out their power rails and the solder on headers

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@lyric seal which bluefruit product are you working with?

odd willow
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Hello! Noob alert! I have made a setup with one arduino which controls a 5v fan and a digital ledstrip. I want the fan to go on/off with programmed intervals and at the same time I want the leds to fade on and off. I wrote a code but now they work one after the other (first the led fades in and out one time and after the the fan goes on and of one time and then the led again) instead at the same time. I can't figure out how to fix it. Here also the beginning of the script. Can someone give me a hint how to fix it?

livid osprey
# odd willow Hello! Noob alert! I have made a setup with one arduino which controls a 5v fan ...

Currently, the way your code is structured to run the entirety of RGBLoop() before proceeding to ventilator(). If you wish to concurrently control your LEDs and fan, you'll have to restructure your code to update your LEDs (showStrip()) and whatever controls your fan once per loop() execution. If you use global variables, you can free your code from the for-loop and increment/decrement your LEDs as you adjust your fans.

# 
int brightness = 20;
int ledState = 0;
bool direction = false;

void loop() {
  switch(ledState) {
    case 0:
      if(direction){
        brightness--;
        if (brightness <= 20){
          direction = false;
        }
      }
      else{
        brightness++;
        if (brightness >= 255){
          direction = true;
        }
      setAll(0,0,k)
      break;
  }
  showStrip();
  // insert fan code here?
  delay(10);
}```
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No idea what your fans are doing, I just randomly spun up some code based on your current LED function.

odd willow
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Hi @livid osprey thanx for your answer! This is the rest of the code.

livid osprey
# odd willow

I just provided a starting point for you to revise your code, because I was worried my phrasing of things would be more confusing than some sample code. I'm sure you can take a shot at rewriting the rest of your code based on what I showed you.

odd willow
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yess thank you I gonna give it a try!

sage raven
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thanks for your help @leaden walrus

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awesome little porto boards from adafruit though! keeping those in mind for future projects

livid osprey
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If you're just doing 3-dimensional impulse detection, directional resolution would be a function of both refresh rate and separation distance. With speed of sound at 343 m/s, and an arduino analog input having a refresh rate of around 9600Hz for a 328p (Uno), you're looking at a separation distance of at minimum 343/9600-36mm for a minimally functional directional detection.

If we were to go a step further and try to recognize the direction of a particular sound or multiple sounds, you're probably going to need to compare frequency spectrums, at which point you're going to be limited by your significantly lower FFT sampling rate. I don't even know if Arduino is capable of FFT processing, but it'll likely require hundreds of times more separation distance for a hobbyist system to perform directional audio filtering by parallax...

cedar mountain
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Agreed, I'd aim for an Arduino-compatible Cortex M4 board with the DSP and floating-point processor rather than trying to do this with a low-end 8-bit Arduino.

cedar mountain
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Only vaguely. Almost any MCU should be able to run the ADC fast enough to keep up with an audio signal. The reason you need a fast CPU is for all the data-processing after that.

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Correct. You'd also only have enough RAM to store a small fraction of a second of audio data at a time on an Uno.

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You can choose other available boards. You would probably want to look for a Cortex M4 or M7 processor.

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It's much better than an Uno, but the Due uses a Cortex M3, so it doesn't have floating-point or DSP instructions.

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That's an excellent option, yeah.

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Good luck!

nimble finch
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Hi! I am trying to adapt a pybadge(adafruit) sketch to a esp32 in ARDUINO IDE. The problem is the Arcada library. At some point it uses arcada.timerCallback(...). How can I use something else that works the same for esp32??

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Thank you by the way...!

lyric seal
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Does anyone know how I would be able to connect a Bluefruit LE UART friend and a MPU 6050 sensor so that the MPU 6050 sensor would send its data to the bluefruit and then to my phone? Everything is currently running just through the Arduino but I'm not sure if because how its wired right now is the reason that the bluefruit will not recognise the data. I have a breadboard available to wire the sensors through but I'm just not sure where to start?

vivid rock
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ble uart friend is supposed to connect to a microcontroller and communicate over serial; mpu6050 communicates with the mcu over i2c, acting as an i2c slave. I am afraid there is no way to avoid having an mcu between them

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but you can replace ble friend and arduino by a single device, a ble-capable microcontroller such as itsybitsy nRF52840

lyric seal
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Sorry super new to coding, what is an example of an mcu I could use?

vivid rock
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as I said, ItsyBitsy nRF52840 would work well

feral forum
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Hello all, can anyone confirm if the Adafruit 1.8" with joystick shields work with Arduino Due (V3.3) boards? I am reading that there are logic level converter on the Adafruit and see conflicting info about whether it should be compatible on the Adafruit site (incompatible libraries potentially). Any help is appreciated.

livid osprey
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GPIO pins aren't capable of much current, so you shouldn't use them for supplying power to more than an LED or two.

lyric seal
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@livid osprey Both devices are connected to the Arduino and working as they should be. I'm just not sure at this point wether they are compatible with eachother? I'm also not totally sure what power wiring is?

lyric seal
livid osprey
lyric seal
livid osprey
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I only recommended the breadboard because you have two 5V connections to the same pin. As long as they're connected, you can connect it however you feel comfortable.

lyric seal
livid osprey
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Don't say that, everyone starts somewhere. Take a wire and connect the 5V pin on the arduino to the red (+) power rail down the side of your breadboard, then do the same with arduino GND and the black (-) rail. Then, any of the holes on the corresponding rails can be connected to your 5V and gnd pins for your other devices.

fresh pendant
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I am building code for a Feather M4 Express using arduino-cli. How do I make it use USB CDC for Serial.begin()?

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I am guessing I have to add something to the arduino-cli compile command but I don't know what.

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or maybe there's some other reason usb is not appearing

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yeah there's some other problem. maybe USB and freertos are not compatible. hmph.

livid osprey
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The V1 shield directional buttons is pulled to 3v3 on a single analog pin, so that should be fine too. It does look like the old board has a slightly different pin definition for the LCD though.

heavy star
lyric seal
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Aw thanks @heavy star and @livid osprey . I think at this point my code is just royally screwed up, any chance yall are able to comine?? two codes together?

livid osprey
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Not gonna lie, first thing I thought of when I saw "any chance yall are able to comine??" was me and Doc combining into a Power Rangers-esque giant mecha....

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heh

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I mean, if you post your code, we or someone else might be able to see what's wrong.

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You can either upload the file directly, or copy/paste your code in a codeblock inside```arduino and ```.

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Backtick is the button to the left of 1

heavy star
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3 backticks at the start and end of the code

stable forge
low verge
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Hey what’s the difference between Atmega328 and 328PB ?

gilded swift
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One is Peanut, the other is Peanut Butter

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Lol jk

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One has additional i2c and SPI lines I believe

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The 328PB that is

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@low verge you might find this helpful

low verge
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Thanks.

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The mains features for me are the 10 PWM channels and 2 additional 16bits Timers

north stream
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Also an additional UART

last sapphire
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anyone here know how to use AVR C files/libraries in arduino
or use an arduino sketch in Atmel with some of your own AVR-C code in it
I have a project im working on that uses rotary encoders that I would rather program in C
but it isnt really feasible for me to use the encoders without the rotary encoders manufacturer's arduino code

north stream
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Just put the C files in the same directory

last sapphire
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i keep getting errors

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for examples sketch doesnt recognize ubbr0

north stream
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You may need to include (or perhaps create) a header file that describes the entry points of the C code, and include that in your sketch.

last sapphire
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i dont understand

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I already included an h file

north stream
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That sounds right to me. Can you copy-paste the specific error you're getting?

last sapphire
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okay

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may takle a sec

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sketch suddenly not responding

last sapphire
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@north stream

north stream
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I'm Out now on my phone,

cedar mountain
# last sapphire

Looks like you're probably missing an AVR include file. Do you have#include <avr/io.h>at the top of your file?

green thunder
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Has anyone had success driving > 1 NeoPixel strips on the QT Py RP2040? When I try to use 2, it seems that whichever one I call begin() on is the one that works, while the other one remains unlit. Simplest code to reproduce this:

#include <Adafruit_NeoPixel.h>

#define MAX_BRIGHTNESS 32

Adafruit_NeoPixel strip1(30, 24, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel strip2(30, 25, NEO_GRB + NEO_KHZ800);

void setup() { 
    Serial.begin(115200);
    
    strip1.begin();
    strip1.setBrightness(MAX_BRIGHTNESS);
    strip1.show();

    strip2.begin();
    strip2.setBrightness(MAX_BRIGHTNESS);
    strip2.show();    
}

void loop() {
    strip1.fill(0xFFFFFF);
    strip1.show();
    
    strip2.fill(0xFFFFFF);
    strip2.show();    

    delay(10);
}
#

It doesn't seem to matter which pins I choose

last sapphire
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but now im getting a new error

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now I just keep getting uundefined reference for functions I definitly have

green thunder
cedar mountain
last sapphire
#

dont I need to do that

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how would I fix this problem?

cedar mountain
last sapphire
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that is my h file

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i have some functions I wrote in AVR that I want to use in the main ARduino code

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@cedar mountain

cedar mountain
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Is it possible that USART_LIB_H_ is already being used by a standard library header? You might try changing the name slightly to be sure it's unique.

last sapphire
#

changed to USARTO_LIB_H

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same problem

cedar mountain
#

Is your header being included by your main source file?

last sapphire
cedar mountain
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I'm not sure, then. Can you tell whether it's compiling your USART_lib source as part of the build?

last sapphire
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honestly no

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im seeing some stuff for using precompiled libraries in arduino

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think im gouing to try that

acoustic sand
#

I'm attempting to test an Adafruit NeoTrellis by connecting it to a Feather M4 Express on a breadboard, but I get no response of any kind from the NeoTrellis when the Feather is powered up. The Feather lights up, but the NeoTrellis does nothing.

I'm new to this. Is there something else I need to do first?
I'm wondering if there isn't adequate connection without solder between the Feather and the pins connecting to the breadboard.

2021-10-31_15.13.45-1.jpg
native dagger
#

At first blush I'd say you at least need to solder the pins to the feather

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You're not getting a solid electrical connection so the behavior is generally undefined

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And I'd consider housings for your jumper pins, exposed metal like that can lead to weird bugs if something is touching something it shouldn't.

acoustic sand
#

Thank you. I plan to solder it together, but I wanted to make sure I wasn't missing something first.

native dagger
#

Sure thing.

livid osprey
#

Oh the #endif is at the bottom… why do I always reply and then notice the important details…

pallid grail
#

@leaden walrus I'm trying to test a sketch on PyPortal Titano, and it's not even compiling to begin with, and the errors it's throwing are beyond my capabilities. When you're around next, if you can help, that would be greatly appreciated. Please ping me.

leaden walrus
#

@pallid grail yo. pastey the errors?

pallid grail
#

Oi. Too many for Discord. Hold on, making a file.

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Wait let me try one thing.

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@leaden walrus Ok, I forgot to change the board to PyPortal Titano. Now there's only this: ```In file included from /Users/kattni/AdafruitDev/Arduino Sketches/libraries/WiFiNINA/src/WiFiStorage.h:23,
from /Users/kattni/AdafruitDev/Arduino Sketches/libraries/WiFiNINA/src/WiFi.h:38,
from /Users/kattni/AdafruitDev/Arduino Sketches/libraries/WiFiNINA/src/WiFiNINA.h:23,
from /Users/kattni/Downloads/PyPortal_ArduinoSelfTest/PyPortal_ArduinoSelfTest.ino:11:
/Users/kattni/AdafruitDev/Arduino Sketches/libraries/WiFiNINA/src/utility/wifi_drv.h:293:12: error: 'PinStatus' does not name a type
293 | static PinStatus digitalRead(uint8_t pin);
| ^~~~~~~~~
exit status 1
Error compiling for board Adafruit PyPortal M4 Titano (SAMD51).

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Way better than it was, gah.

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Still, not sure what to do with that.

leaden walrus
#

is PyPortal_ArduinoSelfTest.ino in a repo somewhere?

pallid grail
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Yes, getting link

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The complaint, which may be the issue here.... is that it's written for PyPortal, not PyPortal Titano.

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I'm not sure what that means or what to do to fix it either.

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But one step at a time.

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I was verifying I had all the libs and the compile failed.

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This is the whole guide feedback "The code for the Arduino Test section is not compatible with the PyPortal Titano! It's the code for the regular PyPortal!" So.... nothing helpful to me there other than the obvious potential issue.

leaden walrus
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hits same error for regular pyportal also

pallid grail
#

Ok, that's good at least

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I guess, heh

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I was about to say I guess I could swap boards and check. But you beat me to it.

leaden walrus
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it's a compile error, so can just change board in IDE and click check mark to test other boards. that's all i'm doing at this point too.

pallid grail
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Hmm right

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So it's a fail in a library? It's not even referring to anything in the code that I can find....

leaden walrus
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compiles if reverting to older version of WifiNINA library

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yep. library issue.

pallid grail
#

Blergh.

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Ok...

leaden walrus
#

looks like new things have been added since guide, which is showing 1.3.0

pallid grail
#

It's up to 1.8.13 now

#

I was going to ask how early to go, but I guess that issue nails that down.

#

1.8.2 worked.

#

Ok testing on Titano

leaden walrus
#

still an open issue. so just need to wait till they fix.

#

solution for now is to just revert lib version.

pallid grail
#

HAve we told people to do that in guides before?

leaden walrus
#

not really. only if it persists for a really long time.

pallid grail
#

Code seems to work.

#

On Titano. It doesn't cover the whole screen.

#

Maybe that's the complaint.

#

I don't care about that. The code runs.

leaden walrus
#

could add a warning call out. but would need to remember to remove it later, etc.

pallid grail
#

Ugh.

#

That would fail.

#

No one has complained about that yet

#

so

#

Imma leave it.

#

At least we know if someone does complain?

leaden walrus
#

warning about nina lib version

pallid grail
#

Yeah, I'm saying I wouldn't remember to check to remove it.

leaden walrus
#

yep

#

i think do nothing

pallid grail
#

Sounds like an excellent plan.

#

Ok I did find one "issue"

#

the "Sound" button on the display for the Titano, shows up within a space that is obviously the space it would be on PyPortal, BUT.... the place to tap it on the Titano is as if it was placed properly on the Titano.

leaden walrus
#

screen size thing could be done as repo issue maybe

pallid grail
#

Oh hmm maybe?

#

Good point

leaden walrus
#

yah. ok. so maybe the code example does have issues on titano.

#

you're demonstrating that right now?

pallid grail
#

That's the only issue I can find.

#

Yep.

#

I mean there's no Temp sensor, so the value is wrong, but that's neither here nor there. It's not an issue, it's just a limitation of the hardware. The only thing about this example that doesn't "work" is the button placement vs touch activation point.

leaden walrus
#

seems worthy of an issue. the touch overlay stuff probably needs tweaking.

pallid grail
#

Yep, adding issue now

#

@leaden walrus Thanks for your help! Issue filed with an image for clarification.

leaden walrus
#

np

lean prism
#

I would like to get Neokey working on my arduino as a keypad. Right now I dont even get the lights go up 😦 I dont know whats going wrong. Is there a Sketch for checking if all Neokeys are wired correctly? I wired 5 in a row. The SnapApart does not work

livid osprey
#

Alternatively, if you want to post your code, I or someone else might be able to point out any obvious errors.

#

Are you using the 5x6 snapapart or the 1x4 I2C Neokey?

lean prism
#

Thank I do get lights show up if connecting out and ground but Never manage to get Thema in row light up. I tryed with pico and After much troubble i tryed with arduino but same

#

@livid osprey Thank you a lot for your help!

#

I have the5x6 and cut all of them because I Need 5x4 in special order

#

Maybe I did not wire correctly

#

It was a first try Never did this before.

livid osprey
#

Oh my. I don't know if I can follow that wiring...

lean prism
#

🤪🤣 sorry

livid osprey
#

What do you mean by "special order?" The circuit layout for an orthogonal keyboard shouldn't matter since any kind of sequencing or keyboard output should be controlled in software.

#

Did you make sure all of the in pins are wired to out pins?

lean prism
#

Yes because I cut all of them appart.

#

No not all i guess I check

livid osprey
#

Also, make sure every key has one in and one out pin wired, and not two of either.

lean prism
#

Thats How they connected

4EAECFAB-EA2E-4835-8DED-54CC36F04A11.jpg
#

And the Ones on top just like in manual

livid osprey
#

If I recall correctly, all of the in and out pins on the top and bottom are the same, but the ones on the left and right are different, depending on which row you took them from

#

Because it zig-zags, the keys from the 2nd and 4th row are actually the opposite of the other three rows.

lean prism
#

Yes I connected the Outside out to in into next row following the arrows

livid osprey
#

If all the arrows follow your neopixel strip, you should be able to use them as a neopixel strip using the code snippets in the neopixel uberguide.

lean prism
#

But don’t they have to be connected as a matrix?

livid osprey
#

Only for the keys. If you're just testing the lights, there's no matrix to worry about yet.

#

One step at a time haha

lean prism
#

oh ok so Let me clearify for understanding please.
I have to connect what to what in Order to get the lights on for now?

livid osprey
# 
Arduino___NeoKeys
5V -----> VIN
7 ------> first IN
GND ----> GND
#

You'll have to modify the definitions to match your setup though

lean prism
#

Is there a Tessin for 7 as First in? Just asking. Will do its that way for Testing now

livid osprey
#

A what? Sorry, I'm not sure what you're asking

lean prism
#

Sorry auto correction

#

Is there a reason for using Pin 7?

livid osprey
#

Oh, I took it from the sample code in the example above

#

You can change it to any pin you want

#

I don't even know which Arduino you're using anyways haha

lean prism
#

Its a micro

#

So loading the sample onto micro and connect as you posted above should light them up?

#

The example tells Define rows and columns and I just have one row for testing

#

But eather way. No lights at all on matter what I do

livid osprey
#

You'll have to modify the row/col pin parameters and definitions for it to compile properly. The code is written for a feather RP2040, so some of the pins used don't exist on the Arduino micro.

#

You have VIN and GND connected?

#

Oh, the sample code only lights up when you have the key pressed

lean prism
#

I only get light on if i connect ground and out

#

Also no funtcion if Pressing keys too

#

I am lost 😩

livid osprey
#

You can go to the setup() function and change the line lit[i] = false; in the for loop to lit[i] = true;

#

If you haven't connected the keyboard matrix, the keys won't do anything yet

#

Do you get any compile errors?

lean prism
#

So the sample needs to get modifed more then just write the correct Pins for it?

livid osprey
#

Well, only if you didn't already connect your matrix

#

If you did, and you updated the pins accordingly, you should get lights...?

#

Oh, actually, there might be one more correction...

#

the line keynum = row * COLS + (5 - col); should be keynum = row * COLS + (COLS - col); i think

lean prism
#

I connected my neokeys as shown in picture and made the Right pins. I did. not put keys an all of them for testing. And i did. not change anything with keys in that code. I only will use 20 keys and not 30

livid osprey
#

Yeah, you absolutely need to change the ROWS and COLS definitions, as well as the rowPins and colPins

#

Other than that, as long as the code compiles, you should be able to get SOMETHING...?

lean prism
#

No Problems with that but no lights

livid osprey
#

Might not be correct, but it should at least do something.

#

hm.

lean prism
#

All i would like to have for now is to check if they can just light up all at the Same time to check if wiring is correct

#

But the code could be the wrong for it or not?

#

The example code i mean

livid osprey
#

try File > Examples > Adafruit NeoPixel > simple for a simpler neopixel sample code

#

Just update the PIN and NUMPIXELS definitions.

lean prism
#

ok

#

Ok the first lights up now

#

the other 3 do Not

#

(Its for testing in row)

livid osprey
#

Are all of the RED wires connected to VIN? I thought VIN was the hole on the left on the top side.

lean prism
#

Well all of them are connected to another Pin on the Arduino Right now

livid osprey
#

I don't think the other pins drive enough current to power a neopixel.

lean prism
#

The right one is defined in the Code

livid osprey
#

Correction, they can, but they probably shouldn't be used that way.

lean prism
#

The other not

livid osprey
#

Did you connect the VIN pins? They're the only ones that matter for lights.

lean prism
#

Yeah think I should

livid osprey
#

Well, not the only one, I should rephrase.

#

If you don't connect VIN to the arduino's 5V pin, you won't get any light

lean prism
livid osprey
#

As long as they all tie back to the Arduino's 5V, you should get some light.

lean prism
#

And yes they do of corse but that is not the way it showed in the tutorial with the neokey 5x6 ortho

livid osprey
#

Yes, because they wired it assuming you didn't snap the board apart yet haha

#

If you snap it apart, you have to make the other connections.

lean prism
#

I thought that too but:

livid osprey
#

The VINs are connected internally in the board's snaps, but without them, you have to connect them all together yourself

lean prism
#

Yes i did. with the ones underneath in the rows

#

But the ones on top go into different pins in Arduino

#

Oh

livid osprey
#

There is no VIN pin on the sides.

lean prism
#

Oh you are Right sorry

#

I just connected columns of cours

livid osprey
#

You should connect the GND pins together, that is correct

lean prism
#

And Made row in and gnd

livid osprey
#

But you need to make sure you have all the pins you need haha

lean prism
#

Ok so they all had no power

#

🙈

#

And that little thing Made me kill 2 Picos and wasted hard time of my life haha

livid osprey
#

Alright, I gotta go prepare for a meeting

lean prism
#

Thank you so much.

#

I will rewire again and Check

livid osprey
#

Hope the rest goes smoothly now haha

lean prism
#

Hope too thanks a lot

lean prism
#

Ok. I still dont get it to work. No matter what I do. Maybe I soldert to much by now and damaged some of the Neokeys. But I dont want to give up. Therefor I would need a little help of how to wire up this matrix. I made a little matrix and maybe someone has a little time to show me, what pins need to be connected in correct way. That would be very helpfull for me to find out my mistakes.

#

I only can get the first one light up. No other. No matter if I connect them or not. No matter if using a new one or connect other ways... I am really lost with that . just connecting the Vin to each other did not help eather

brazen falcon
#

Believe this should be correct.

Testwire.jpg
lean prism
#

I will Check that later. Thank you very much

livid osprey
lean prism
#

Ah makes sense. I have ordered cable with Pins so i can do it all again

#

Thanks

livid osprey
#

Not all of the keys have the same direction, so if you're really not confident you can also just avoid using the let and right side data lines entirely.

#

Thankfully, the top and bottom connections are consistent throughout.

lean prism
#

Ok just go for in and out like another snake

#

The vin any Suggestion of get them nicely together too?

livid osprey
#

Both of the VIN connections on each key are on the same bus, so technically you could simply ensure that all the VINs are connected to one another.

#

However, in practice, 5V neopixel strips see voltage drops further down in longer strips, so you may want to use thicker-gauge wire if you plan to just daisy-chain them all together across a single path.

#

For 20 keys, you can probably get away with 22/24AWG wire and a VIN to Arduino connection on both ends.

#

I forget how many pixels the recommendation is to reinject a voltage source for strips...

lean prism
#

Oh ok 22/24 awg i Need to Google this

#

I ordered dupont wire Male to gemalt in Order to wire easier

#

Maybe now Not big enough

livid osprey
#

You could try it and see.

#

It could work.

lean prism
#

They will just not light up that much right?

livid osprey
#

Some keys might be a bit dimmer than others, but they should all light up regardless

lean prism
#

ok

#

This picture just mirrored the 2 at the bottom so sure, the col and vin are other side

livid osprey
#

With only 20 keys, I don't think the voltage will drop enough to turn the lights off completely. If the last key is too dim, you can try connecting the last VIN back to the Arduino as well and see what happens then.

lean prism
#

but based on arrows as it goes in tutorial, i should be fine that way

#

thanks Hem.

livid osprey
#

If you're using exclusively the top and bottom O and I connections, the arrows shouldn't matter to you anymore.

lean prism
#

ok

#

why you would use the other then anyway? 😄

livid osprey
#

Cleaner wiring?

#

Not that the primary intent was to snap all the keys apart, but they included it for whomever's use case.

#

Though following the arrows can help shorten the wires a lot if you do zig-zag

lean prism
#

Ok i understand i really Love this System its very Smart and Perfect for my use

livid osprey
#

It removes the need for the long wires at the end of each column

maiden pilot
#

Hey guys! I'm running arduino on an esp32, it uses a Adafruit BNO055 sensor to send position data wirelessly over UPD. I'm hoping to figure out how to put the esp in to sleep mode when the IMU doesn't detect motion for X seconds. I'm not even sure where to start with this. Is it possible for the ESP to be "listening" for updated values while in sleep mode?

livid osprey
maiden pilot
#

Oh, no I'm not hoping to send a sleep signal to it wirelessly

#

the BNO055 is wired directly to the ESP32

#

I just need to figure out how to set the BNO055 to wake the ESP32 over GPIO

livid osprey
maiden pilot
#

great! thanks

daring tide
#

I am trying to do a project with the nRF52840 Feather board, but I can't compile even a simple test program. I updated the bootloader, deleted all old files and fresh installed the arduino IDE, tried different versions of the board library, but they all gave me different errors compiling. Here is the error I get on the latest version 1.1.0
```c:/users/evelyn/appdata/local/arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: sketch\sketch_nov01a.ino.cpp.o: in function setup': C:\Users\Evelyn\Documents\Arduino\sketch_nov01a/sketch_nov01a.ino:16: undefined reference to Adafruit_USBD_CDC::begin(unsigned long)'
c:/users/evelyn/appdata/local/arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: C:\Users\Evelyn\Documents\Arduino\sketch_nov01a/sketch_nov01a.ino:17: undefined reference to Adafruit_USBD_CDC::operator bool()' c:/users/evelyn/appdata/local/arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: C:\Users\Evelyn\Documents\Arduino\sketch_nov01a/sketch_nov01a.ino:29: undefined reference to Serial'
c:/users/evelyn/appdata/local/arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: sketch\sketch_nov01a.ino.cpp.o: in function loop': C:\Users\Evelyn\Documents\Arduino\sketch_nov01a/sketch_nov01a.ino:78: undefined reference to Serial'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Adafruit Feather nRF52840 Express.

livid osprey
daring tide
#

not even uploading yet, just compiling. it's a simple keyboard matrix test program. heres setup()

void setup() {
    Serial.begin(115200);
    while ( !Serial ) delay(10);   // for nrf52840 with native usb
 
    for(int x=0; x<rowCount; x++) {
        Serial.print(rows[x]); Serial.println(" as input");
        pinMode(rows[x], INPUT);
    }
 
    for (int x=0; x<colCount; x++) {
        Serial.print(cols[x]); Serial.println(" as input-pullup");
        pinMode(cols[x], INPUT_PULLUP);
    }
         
}
#

oh. i didn't know i needed to #include <bluefruit.h>

livid osprey
#

Haha, was about to ask you for your #include lines

daring tide
#

yeah i didn't think i needed to include anything

livid osprey
#

Hopefully that fixes everything.

daring tide
#

yep it uploaded just fine

daring tide
#

it worked fine for a while, but now i can't upload.
when i try to upload after a normal boot (was working fine):


Failed to upgrade target. Error is: Serial port could not be opened on COM8. Reason: could not open port 'COM8': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)
Traceback (most recent call last):
  File "dfu\dfu_transport_serial.py", line 113, in open
  File "serial\serialwin32.py", line 33, in __init__
  File "serial\serialutil.py", line 244, in __init__
  File "serial\serialwin32.py", line 64, in open
serial.serialutil.SerialException: could not open port 'COM8': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "__main__.py", line 296, in serial
  File "dfu\dfu.py", line 235, in dfu_send_images
  File "dfu\dfu.py", line 157, in _dfu_send_image
  File "dfu\dfu_transport_serial.py", line 115, in open
nordicsemi.exceptions.NordicSemiException: Serial port could not be opened on COM8. Reason: could not open port 'COM8': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)

Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
    Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
#

when i try to upload in DFU mode:

    at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:152)
    at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)
    at processing.app.SketchController.upload(SketchController.java:732)
    at processing.app.SketchController.exportApplet(SketchController.java:703)
    at processing.app.Editor$UploadHandler.run(Editor.java:2061)
    at java.lang.Thread.run(Thread.java:748)
Caused by: processing.app.SerialException: Error touching serial port 'COM9'.
    at processing.app.Serial.touchForCDCReset(Serial.java:107)
    at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:136)
    ... 5 more
Caused by: jssc.SerialPortException: Port name - COM9; Method name - openPort(); Exception type - Port busy.
    at jssc.SerialPort.openPort(SerialPort.java:164)
    at processing.app.Serial.touchForCDCReset(Serial.java:101)
    ... 6 more
#

i had changed the baud rate in Serial.begin to 9600, would that have affected it? and if so, how can I fix this? can something so simple completely brick the board?

#

of course it randomly decides to work now

#

but i just keep getting that port busy message all the time

#

resetting sometimes fixes it

#

like i can't even open the serial monitor, it just says port busy

solemn cliff
#

could something be still running that is using it, or could the port have changed ?

daring tide
#

it was working okay 10 minutes ago. i would have to reset it once each time i uploaded to get the serial monitor up, but it was consistent with that. but now, it isn't working at all. i haven't opened any new programs since then, and i have had device manager open to check the port and it is correct

#

if its the wrong port it is a different error message than port busy anyway

#

the device boots up and runs the program, so it gets past the while ( !Serial ) delay(10); // for nrf52840 with native usb line

daring tide
#

i've never been more frustrated at a project honestly

#

its so inconsistent

#

for the price of this board i expect at least the basic functionality to work more than 10% of the time

north stream
#

It's not the board, but that your computer is allocating a different port every time the board enumerates.

daring tide
#

the process is always the same and sometimes works fine. i keep an eye on the com ports while it happens

#

it seems like the process when uploading during a normal boot is this
on COM8, send command to reboot into DFU as COM9
switch to COM9, flash firmware
switch back to COM8 for normal serial communication

#

that process was working consistently for me until it wasn't

#

and again, i can manually enter DFU and switch to COM10 but most of the time it will say port busy when I do that and I have to manually enter DFU at least 2 or 3 more times before it works

#

huh, looks like having cura running at the same time might have been interfering

solemn cliff
#

oh yeah

#

I was gonna ask but you mentioned you didn't run anything else

daring tide
#

yeah, i was 3d printing parts for this so i had it open

solemn cliff
#

you gotta disable the USB plugin in cura if you don't need it

#

it hogs the serial ports

daring tide
#

thanks, i'll do that now

solemn cliff
#

"Marketplace" -> "Installed" tab and uncheck "USB Printing".

daring tide
#

got it, i use octoprint anyway

solemn cliff
#

same, cura was spitting M105 (report temperature) all over my REPL

daring tide
#

oof. well that definitely fixed it, thanks!

lean prism
#

@livid osprey the in and out just follow the arrows Right?
The pictures yesterday are little confusing because I will connect just like it is on the Board

IMG_4716.jpg
#

And i will connect everything First before snapping appart this time

#

And does vin needs to follow a special way too or is this ok? Missed one line on the bottom left

IMG_4716.jpg
brazen falcon
#

If they're snapped apart totally, I think either neopixel DO can be connected to either of the next one's DI. The arrows are just to show the path if its left intact.

lean prism
livid osprey
#

Yes, the arrows are there to help indicate which side is do and which side is di

#

Once they’re all snapped apart and mixed up, it’s be hard to tell otherwise

lean prism
#

ok. And what about the way of VIN?

livid osprey
#

Any way is fine.

lean prism
#

thanks. again 🙈

brazen falcon
#

the signals for the neopixels are routed through the snapapart sections only in the directions of the arrows if you leave them intact.

stray forge
#

Can the MusicMaker be used with the PulseSensor?

lean prism
#

@livid osprey First Check seems to be fine 🤗

lean prism
#

I think I have wired everything to where it belongs to. Am I right that in Order to get the Ortho 5x6 Demo function correctly, I have to snap it apart now? @livid osprey

lean prism
#

It looks like i am missing a connection 🤔 dont get it

#

I used the simple Test from your help.

solemn cliff
lean prism
#

omg yes I am not done yet

#

wow directly lights up then

lean prism
#

Is there a way to tell a single Key a special color and the color has to change in another after push?

#

oh maybe the wrong chat? I will try in makecode

autumn timber
#

Hello I'm using an Arduino Mega 2560 and a fingerprint sensor AS608 and I'm using the Adafruit Fingerprint Sensor Library, the sensor is recognized (the light turns on) but when I upload it it says "Did not find fingerprint sensor" I was wondering if somenone has any tips!

leaden walrus
#

the light is probably just coming on with power

#

which fingerprint sensor is it? link to product page?

livid osprey
leaden walrus
# 
Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62), A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).

if using software serial, also need to check pins being used

autumn timber
leaden walrus
#

how are you connected to the mega? which wires to which pins?

autumn timber
#

Red Wire to 5V - GND to GND - White Wire (RX) to 10 and Yellow Wire (TX) to 42

lean prism
#

I just need it the way

#

explained above

leaden walrus
#

@autumn timber what does your SoftwareSerial mySerial(?, ?); line look like?

#

try:

RED (V+) to Mega 5V
YELLOW (TX) to Mega 10
WHITE (RX) to Mega 42
BLANK (GND) to Mega GND

with:

SoftwareSerial mySerial(10, 42);
autumn timber
#

Didn't work

livid osprey
leaden walrus
#

@autumn timber try different baudrates?

#

also, maybe not a 5V device?

#

the adafruit library also may just not work with that model

lean prism
autumn timber
#

@leaden walrus ok, I will try that

crystal vapor
#

Adafruit SPI Flash library use with itsy nRF52840

Hi!
Is there any reason not to use the Adafruit SPI Flash and SdFat (Adafruit fork) libraries with the itsy express nrf52840 board?
The sd_FAT Format sketch compiles fine with itsybitsy nrf52840 express board selected.

The guide I am using is for a Feather m0 board: https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-circuitpython/using-spi-flash

Adafruit Learning System
Adafruit Feather M0 Express - Designed for CircuitPython

Get running faster than ever with the first Adafruit Express board

autumn timber
#

@leaden walrus what do you think I should change?

Captura_de_ecra_2021-11-05_204212.png
leaden walrus
#

@autumn timber finger.begin(57600); <-- try different baudrates there

autumn timber
#

@leaden walrus nothing

leaden walrus
#

could be a different sensor than the library supports

autumn timber
#

maybe

#

perhaps I need a TTL serial cable

lean prism
#

I tryed the Neokey Ortho Demo again and basicly changed the values you mentioned earlyer in here. But there is no function at all. Seems like the Keys not working? How do I activate them? The Neopixel Demos work just fine

lean prism
#

it copy the sketch but this errors occure:

#

Arduino\libraries\Adafruit_Keypad/Adafruit_Keypad_Ringbuffer.h:57:5: note: type 'struct Adafruit_Keypad_Ringbuffer' should match type 'struct Adafruit_Keypad_Ringbuffer'
Adafruit_Keypad_Ringbuffer;

#

Arduino\libraries\Adafruit_Keypad\Adafruit_Keypad_Ringbuffer.h:57:5: note: the incompatible type is defined here
Adafruit_Keypad_Ringbuffer;

autumn timber
#

@leaden walrus I got it to work

crystal fossil
#

Hey folks, I am having some trouble controlling the nixie tube clock that I have been building. I have been working on a simple library for it, but whenever I open the serial monitor in this simple example, tons of lines which I do not understand are printed. They appear on the same baud frequency as the upload speed, rather than what was set in my code, which I do not get. I turned off autoscroll but with it on it is continually printing this. Has anyone seen this before? What may be causing this? I am using the Feather Huzzah32 (ESP32) board. I will post a screenshot of the code and paste the library code below.

Arduino_Issue.PNG
#

Please note that I have just recently started with this and am doing this as a means of learning Arduino and coding in general. If I have made a stupid mistake or seem to not understand something, please help correct it. Thank you.

cedar mountain
crystal fossil
#

I am now getting a new message:

Arduino_Error2.PNG
cedar mountain
crystal fossil
#

Ok. Thank you for your help. I will fiddle around with this some more later on and try to see what is causing it. Have a nice day

formal onyx
#

I want to use a bluetooth module with my arduino nano, I've used it with an uno, and know that I shouldn't connect it to pins 0/1 because it interferes with uploading. On the uno, I believe I used alternately 11/12 or 12/13, I know some pins work but not all, which pins can I use for the arduino nano?

cedar mountain
lean prism
#

@leaden walrus hello. I have problems using the Sample Sketch Adafruit Keypad\Ortho 5x6Demo. I get this Error:

#

C:\Users\nosfe\Documents\Arduino\libraries\Adafruit_Keypad/Adafruit_Keypad_Ringbuffer.h:57:5: note: type 'struct Adafruit_Keypad_Ringbuffer' should match type 'struct Adafruit_Keypad_Ringbuffer'
Adafruit_Keypad_Ringbuffer;
^
C:\Users\nosfe\Documents\Arduino\libraries\Adafruit_Keypad\Adafruit_Keypad_Ringbuffer.h:57:5: note: the incompatible type is defined here
Adafruit_Keypad_Ringbuffer;
^

#

Any idea what I can do about this?

cold lagoon
#

im trying to brogramm an Rotary encoder but it keeps giving me 0 and -1 if i rotate it

charred sun
#

Has anybody been able to successfully set up / Upload code via the Arduino IDE on a macintosh for the LED glasses that came in the latest Adabox (20)? I get an obscure python error that I can't decipher and can't upload the demo code. Circuit Python stuff works fine.

spark harness
#

i have the SSD1306 OLED Display, how can i make it so that it displays things (like a bitmap for example) in more than 1 color?

cedar mountain
spark harness
#

is it a monochrome display?

#

@cedar mountain

cedar mountain
#

Can you link to the product page for the one you have? The SSD1306 just specifies the driver chip, not the display panel.

spark harness
#

oh nvm its just white text

leaden walrus
#

@lean prism can open a new issue, be sure to specify what hardware platform you are building for

lean prism
#

I am on Windows 10 and use arduino micro. @leaden walrus

crystal vapor
paper mist
#

hi guys, i'm trying to use the fontconvert tool included with the adafruit gfx library however i'm running into an issue when building it that ft2build.h was not found. i have freetype2 package installed (i'm on arch linux) and the package does show under /usr/include so i'm not sure what is causing this error. maybe ft2build is an outdated name or something? any help is appreciated, thanks 🙂

#

never mind, i'm an idiot, was building manually with gcc instead of using the makefile facepalm

pine bramble
#

;)

#

pico-sdk seems to leverage the OS quite a bit. I installed arm-none-eabi-gcc (whatever that sequence is) to satisfy a dependency and it works just fine.

#

So I mean it liked the Debian package for that version of gcc.

#

Usually, they fully support Linux in these kinds of things.

fiery verge
#

Hi all, I was wondering if anyone can point me to the definition of Arduino pins to microcontroller ports for the SAMD51. For example, on https://learn.adafruit.com/adafruit-matrixportal-m4/pinouts, it notes the board.ESP_RESET is Arduino pin 30. Is there a way for us mortals to find that mapping? I have a few other pins on that design that I know the port number (e.g. PA12 and PA13) but I need the Arduino pins to use them in PlatformIO

north stream
#

So boards in general go in the Library folder in Arduino15/packages, then there are subdirectories for the various vendors. Under that, the boards are under "hardware", then sorted by architecture (the M4 is a SAMD), then version.

vivid rock
#

on windows, it is in
C:\Users\<username>\AppData\Local\Arduino15\packages\adafruit\hardware\1.6.5\variants

#

Note that normally folder AppData is hidden from view, as most users do not need to know of its existence (or at least, so Microsoft thinks), so you need to turn on option View->Hidden items in the file browser

fiery verge
#

@north stream / @vivid rock thanks for the tip! That is exactly what I was looking for. I didnt realize all the pins I needed already had #defines in those files so Im all set!

viscid snow
#

Hey everyone,

I am having problems controlling a stepper motor using my Arduino Nano. The code I'm trying to use is found here: https://atlantisq.wordpress.com/portfolio/obj-2601-barn-door-tracker-astra-v2-1/

I can't seem to make the stepper turn, however other sketches do make it turn. I don't fully understand the code provided so I don't know how to troubleshoot

OKB-315 'Chilton'
Peter Qin
Obj. 2601 Barn Door Tracker “Astra V2.1”

Astra is a barn door tracker for astrophotography. It uses a straight leadscrew drive and can be driven by a 5V USB power source. An Arduino is used to control the speed of the leadscrew in order t…

livid osprey
viscid snow
livid osprey
#

MIght be a problem with the stepper.h library, since the other example seems to have hard-coded its own stepper motion. Do you get any errors in your serial output?

viscid snow
#

are you referring to the example that is working when you're talking about the "other example"?

livid osprey
#

Yes

viscid snow
#

Yeah, It has the weird use of cases

#

I do not seem to get any errors, uploads work fine and the serial output is as expected, allthough it goes very fast

#

when I do turn off the comments, that is

#

A video showing the problem and my driver board

livid osprey
#

not sure why your step states are alternating like that, there's no way your stepper would turn if that's the sequence it's following.

viscid snow
#

That's what I was thinking, but I'm not sure what part of the code makes it behave like this

livid osprey
#

Try changing the steps in the while loop from 2 to 1?

viscid snow
#

so like this?

  stepper.step(1);
  steps=steps+1;```
livid osprey
#

Try that. If it doesn't work, you can also play with the speed setting.

viscid snow
#

Seems to have done something!

livid osprey
#

Should at least turn now. My guess is the stepper library defaults to 4 steps per cycle instead of 8...

viscid snow
livid osprey
#

Yeah, you might have to do some adjustment somewhere else.

#

I can't speak for the motor math the original author did, but the difference between the motor turning and not makes me think that this is the original desired behavior the author wanted when he set the steps to move by two at a time.

viscid snow
#

right

livid osprey
#

I would just use it as is, while being aware that the math may or may not be off due to the change you had to make to get it to work in the first place.

viscid snow
#

the '2' would point to the amount of steps the original author would want it to take

livid osprey
#

Probably a difference in assumed default behavior.

#

Test it and see if the speed matches, I guess.

viscid snow
#

Which is confusing me, because i'm using the exact same hardware haha

#

Hm I'll try it some more

#

thanks anyways!

nova comet
#

Hey everyone. I’ve been trying to create a program that essentially generates a PWM pulse on the rising edge of one of my IO. However, I have very tight time constraints so I found that using analogWrite for generating pwm was a little slow.

I resorted to polling the channels who’s rising edges i care about and basically just toggle the output high and low with the calculated period. The problem now is that the delay function isnt very accurate at low uS values and also seems to have some overhead. Yielding slightly off duty cycles.

I was hoping for help on this. Perhaps help writing a function that generates a PWM signal given a specific frequency and duty cycle.

#

I can send code if that helps

cedar mountain
#

Generally you'd probably want to make use of a timer peripheral on the microcontroller, but the details of that will depend on the chip you're running on.

nova comet
#

Im using a seeeduino xiao, samd21 mcu

#

I tried writing some stuff with timers but i dont have a ton of experience with it

cedar mountain
#

Cool, that's a nice modern chip which should have a pretty capable timer.

nova comet
#

Any resources that might help me get going?

#

I have three 120hz signals that come in one after the other, with a little dead time between. Ill have to change duty cycle and frequency at each rising edge

cedar mountain
#

Not off the top of my head, I'm afraid. I'd just be doing the same Google searches you would. 😉

nova comet
#

Fair enough

green heath
# 

#define rs 12
#define rw 11
#define en 10
#define d4 9
#define d5 8
#define d6 7
#define d7 6
#define contrast 0

#define left 13
#define right 12
#define pot



LiquidCrystal lcd(rs,rw, en, d4, d5, d6, d7);

void setup() {
  //analogWrite(5,contrast);
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("hello, world!");

  pinMode(left, INPUT_PULLUP);
  pinMode(right, INPUT_PULLUP);
  pinMode(5, OUTPUT);
  digitalWrite(5, LOW);
  
}

void loop()
{
  int state = 0;

  

  //lcd.print("hello");

  //while(true)
  {
    delay(1000);
    lcd.clear();

    if(digitalRead(left)) 
    {
      lcd.setCursor(0, 1);
      lcd.print("turning left");   
      state = 0; 
    }
    else if(digitalRead(right)) 
    {
      lcd.setCursor(0, 1);
      lcd.print("turning right");
      state = 1;
    }
    //else if(!digitalRead(right) && !digitalRead(left))  state = 2;
    else state = 99;        
    switch(state)
    {
      case 0:
       

      //todo set stepper direction left
      //todo set speed           
      break;

      case 1:
      

      //todo set stepper direction right
      //todo set speed                
      break;

      case 2:
      //lcd.setCursor(0, 0);
      //lcd.print("following mode");

      //todo set stepper direction right
      //todo follow pot
      break;
      case 99:
      //lcd.setCursor(0, 0);
      //lcd.print("idle");
      break;
    }  
  }
}
#

oops, oh well, my code is printing random characters on the LCD screen. any idea what this is causing?

#

the only thing I found was that I couldnt use pwm for the contrast and that would possibly be the cause. and that I should use a pot. but I dont have a pot and not much room on my perfboard for a voltage divider and hoped putting it on a pin would do the trick

leaden walrus
#

which LCD?

green heath
#

1602A

leaden walrus
#

does "hello, world!" show up?

green heath
#

the hello world example works fine

#

I am trying the set cursor example right now

#

it does show up on startup as well. then it adds random characters

leaden walrus
#

are left/right wired to buttons?

green heath
#

yes, input_pullup on one side and ground on the other

#

OH

#

hold on

leaden walrus
#

so high/true will be not pressed

green heath
#

the ground I use is external on Vin and ground

#

which I disconnected to program

leaden walrus
# 
    if(digitalRead(left)) 
    {
      lcd.setCursor(0, 1);
      lcd.print("turning left");   
      state = 0; 
    }
#

you want that to happen when the button is pressed?

green heath
#

yes

leaden walrus
#

i think you need to invert the logic

#

if(!digitalRead(left))

#

low/false = pressed

green heath
#

I think I found a different issue, I miscounted the ports. 12 is already used for the LCD, and overwritten for the one of the buttons

leaden walrus
#

oh yah...yep. looks like maybe.

#

good catch

green heath
#

that fixed it, and it looks like I need to invert the buttons too 😄

#

thank you

leaden walrus
#

cool!

green heath
#

another question, is the arduino IDE smart enough to decide what size of integer to assign. eg should i use int or should I use fixed width integers?

leaden walrus
#

if you want known fixed size, use the stdint defs, like uint8_t

green heath
#

thank you!

#

another question, can the IDE compile C code? I have an AVR stepper library I would like to use

fresh token
#

I have a CAP1188 that will not communicate at all- no lights will light up when I touch the respective capacitive inputs

#

Any ideas?

#

this is default code

unknown.png
#

nevermind, forgot I melted a hole in the breadboard there 🧠

north stream
native dagger
#

I assume arduino is capable of taking advantage of the 2 cores in an RP2040?

broken viper
#

Yes, I think so

ocean sundial
#

Hi everyone! I have a little project I'm working on using a Nano plus an MPU6050, BMP280 and an HMC5883. I'd like to log the data from these sensors and be able to access it on my computer after each run. However, I'd like to do this with a flash memory. I was hoping you guys could help me with this as I've never worked with flash memory before using Arduino and the greatest challenge I've found is getting the data from flash.

The common solution here is an SD Module, however, the modules I've found so far are too big for the 4x6cm form factor I'm using and I want to (1) stay within that form factor and (2) use a module that is high-vibration tolerant - so an SD Module is probably a no-go (unless you know of any modules small enough). I have found two breakout boards that might work for my project. There's the W25Q64 64Mbit 8MByte Flash Storage Module and Adafruit's XTSD 512 MB breakout boards. I'm heavily inclined towards the XTSD given its greater memory storage despite being bigger than the W25Q64 module. What I don't know is how to get the logged data from either module (if that's even possible).

  1. Is it possible to 'dump' flash via the Nano's USB port onto the serial monitor? or
  2. Maybe add some male header pins to my project and connect an SD Module with an SD card and 'dump' flash onto that external module (after each run)?
  3. Do you think the 328 MCU on the Nano would struggle with this?

I haven't bought neither the XTSD nor the W25Q64 modules because I want to pick one first. Apologies for the newbie questions but I'd appreciate any info, resources or help with this. Thank you!

vivid rock
#

SdFat and TinyUSB libraries allow one to access filesystem on a flash memory chip and even make it accessible to the computer as if it were a removable USB memory stick

#

however, not all boards are supported - those based on m0/m4/esp32-s2(note s2!) work, many others don't

#

maybe instead of nano, use something like itsy bitsy m4?

minor flax
#

Man I'm losing my mind with the caterina bootloader. What a total nightmare.

ocean sundial
pine bramble
#

i have a Adafruit Bluefruit LE UART Friend, and i would like to change it's bluetooth name. is that possible?

pine bramble
#

looks like i should use : AT+GAPDEVNAME

#

but i don't know how to pull the existing name and do a string comparison...

stable forge
pine bramble
stable forge
pine bramble
#

yes. but how do the string comparision in arduino

leaden walrus
#

can just try == as a first pass. with some trim also

willow compass
#

new to this whole Arduino and Adafruit stuff (thrown onto a school project). Currently have an Arduino Mega, and an Adafruit ultimate gps. I am simply trying to parse the gps data that is coming in, but having many problems. The only time I can get any data off of the GPS is if I have the gps plugged into RX and TX (pins 0 and 1), and a blank sketch uploaded into the Arduino. My issue is that I need to get the data to work with TX2 and RX2. I was trying literally any of he available testing code that is given in the library such as the Hardware Serial echo test. But nothing I have tired has worked. not even something as simple as the following code is giving me anything. Serial2.available() is always reading as 0.

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial2.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial2.available() > 0)
  {
    char c = Serial2.read();
    Serial.print(c);
  }

}
leaden walrus
#

@willow compass GPS shield or breakout?

north stream
#

I'm not sure which pins are TX2 and RX2, but Serial 2 should be on GPIO pins 16 (TX) and 16 (RX)

cedar mountain
#

(16 and 17, that is.)

willow compass
#

I think

leaden walrus
willow compass
#

Yes!

#

So my team has been working on it for two hours, I had to leave shortly, they have run through dozens of different tests and basic inputs and pins, the most they have been able to read out of it is a -1

#

Other wise the only time we get data is pins 0 and 1 with a blank sketch, but obviously this isn’t viable

leaden walrus
#

"shortly" = how long? got some time to work things now?

willow compass
#

I have time yes

leaden walrus
#

you're using a mega?

willow compass
#

Yes

leaden walrus
#

one confusing point may be that there will be two serial instances to consider

#

one for the Serial Monitor

#

and one for the GPS

#

if they aren't already in use, can use the Serial1 pins and follow the hardware serial examples

#

19(RX) and 18(TX) on the mega

willow compass
#

Serial 1 is taken

#

we have Serial 2 and 3

#

and we have been changing any variables for Serial2 if it uses Serial1

#

i'm going to try Serial 1 real quick just to see

leaden walrus
#

if it's taken, then don't worry about it

#

the others should work just as well

#

just need to change code

#

i'm testing here with a mega and the GPS breakout

#

this works for me:

5V to VIN
GND to GND
16(TX2) to RX
17(RX2) to TX
willow compass
#

what code?

leaden walrus
#

and change only one line:

#define GPSSerial Serial2
willow compass
#

ok so got that setup

leaden walrus
willow compass
leaden walrus
#

hmmm...not getting any sentences

#

how's your soldering on the breakout? and your wiring connections in general?

willow compass
#

I would assume fine, but I am not the one who was involved with that, our project instructor has been creating our wires and such for us

leaden walrus
#

at this point, checking the hardware setup would be the best next step

#

if you can post a photo here, can take a look

#

or posting in the forums is another option

willow compass
leaden walrus
#

cool. need one of the other side.

#

oh. it's screwed down. 😦

willow compass
#

One sec

#

I can unscrew

leaden walrus
#

thanks. and disconnect the wires. want to check the header pins on the breakout.

willow compass
leaden walrus
#

thanks. soldering looks fine.

#

are the red/black/white/blue wires going directly to the mega?

willow compass
#

Yes

leaden walrus
#

they're female/male jumpers, so going directly into mega headers?

willow compass
leaden walrus
#

ah. there's a shield there too.

#

can that be removed for testing?

willow compass
#

unfortunately no

#

instructor has it very much in place

leaden walrus
#

those are serial wires from the GPS?

willow compass
#

yes

leaden walrus
#

swap them and try again

#

blue on 17

#

white on 16

willow compass
#

white is RX from GPS, and blue is TX from GPS

leaden walrus
# 
16(TX2) to RX
17(RX2) to TX
willow compass
#

alright did that

leaden walrus
#

cool. it's working now.

#

that's the general output you'll see until it gets a lock

#

then there will be more info

willow compass
#

alright, i'll have to do that later as the wheels are off of this thing

#

but thank you for the help

leaden walrus
#

np. looks like a common TX/RX connection confusion. happens all the time.

#

in general, you want:

TX <-> RX
RX <-> TX
willow compass
#

bruh, instructor told us the opposite

leaden walrus
#

it's a confusing topic

#

there are other protocols where you do match pin-to-pin

#

like SPI or I2C

willow compass
#

makes, sense, we have that with other things and it works fine

leaden walrus
#

a lot of confusion comes from devices that will label their RX pin as TX and their TX pin as RX

#

just to allow TX<->TX and RX<->RX when making wiring connections

#

but for others used to the general connection scheme, they will try it the other way, get it wrong, be confused, etc.

willow compass
#

was about to say, even on the adafruit guide it says tx to tx and rx to rx

#

but that makes sense

leaden walrus
#

it's a "fun" issue that we just have to live with. there's no simple solution.

#

the GPS guide?

willow compass
#

yes

#

well in theory, unless it is what you say

leaden walrus
#

ugh. so...yet another layer of confusion.

#

yah, that's for a specific use case.

#

with the uno

#

ignore that section of the guide. it doesn't really apply for your use case.

#

and since you have available hardware serial, use that info. ignore the "software serial" info.

# 
GPS RX to Feather TX and GPS TX to Feather RX.
#

then it's more inline with expected normal wiring

willow compass
#

Alright

#

Thank you !

#

I apologize for added confusion of being confused in general. Was thrown in the deep end on this

leaden walrus
#

np. and nothing really to apologize for. as simple as serial should be, it can be amazingly confusing.

acoustic sand
#

Do I need to install something special to mount circuitpython on a Feather M4 Express under Ubuntu on a Raspberry Pi? It shows up under Windows 8.1, but not on a Raspberry Pi running either Ubuntu or Raspbian.

I do have a lot of disks showing up when I run sudo fdisk -l but I've no idea if one of them is my Feather. I'm new to Linux and Adafruit products.

Maybe this is the correct drive?

Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
leaden walrus
#

try checking dmesg after plugging it in

#

you may need to mount it

#

but if you're running the desktop version, i'd expect it to automount it similar to windows

acoustic sand
#

dmesg gave me pages and pages of text. I'm not sure what I'm looking at, but there are errors.

north stream
#

248 KiB is a pretty small drive.

leaden walrus
# 
pi@raspberrypi:~ $ dmesg | tail -20
[  255.205776] input: Adafruit Industries LLC QT Py M0 Keyboard as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.3/0003:239A:80CC.0001/input/input3
[  255.272282] input: Adafruit Industries LLC QT Py M0 Mouse as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.3/0003:239A:80CC.0001/input/input4
[  255.273014] input: Adafruit Industries LLC QT Py M0 Consumer Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.3/0003:239A:80CC.0001/input/input5
[  255.273477] hid-generic 0003:239A:80CC.0001: input,hidraw0: USB HID v1.11 Keyboard [Adafruit Industries LLC QT Py M0] on usb-3f980000.usb-1.3/input3
[  255.369062] usbcore: registered new interface driver uas
[  255.392328] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
[  255.395175] usbcore: registered new interface driver cdc_acm
[  255.395198] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[  255.464147] usbcore: registered new interface driver snd-usb-audio
[  256.234785] scsi host0: scsi scan: INQUIRY result too short (5), using 36
[  256.234821] scsi 0:0:0:0: Direct-Access     Adafruit QT Py M0         1.0  PQ: 0 ANSI: 2
[  256.239321] sd 0:0:0:0: [sda] 129 512-byte logical blocks: (66.0 kB/64.5 KiB)
[  256.251402] sd 0:0:0:0: [sda] Write Protect is off
[  256.251434] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00
[  256.254217] sd 0:0:0:0: [sda] No Caching mode page found
[  256.254247] sd 0:0:0:0: [sda] Assuming drive cache: write through
[  256.278764] sd 0:0:0:0: Attached scsi generic sg0 type 0
[  256.335073]  sda: sda1
[  256.361873] sd 0:0:0:0: [sda] Attached SCSI removable disk
[  256.942732] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
pi@raspberrypi:~ $ ls /media/pi/
CIRCUITPY
#

that's running latest rasp pi os desktop

#

after plugging in a QTPY running CP 7

#

it did automount it under /media/pi

#

i'm ssh'd in, so not sure what the actual desktop UI does

acoustic sand
#

I ran mount and I see no /media/pi

leaden walrus
# 
pi@raspberrypi:~ $ mount | grep CIRCUITPY
/dev/sda1 on /media/pi/CIRCUITPY type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)
#

so it must be something with the OS version you're running

acoustic sand
#

Thank you. That at least narrows it down.

#

I should have mentioned that it mounts fine in boot mode.

#

I'm going to flash the board and try again. maybe I corrupted something.

leaden walrus
#

good idea. that can happen for various reasons.

#

and you'd see same behavior on another machine

#

even after installing new firmware, you may still get same behavior

#

neat! only took a minute to get VNC setup.

unknown.png
faint junco
#

Hi guys. How loud should my buzzer be for the driver to hear it? I'm trying to make an alert system for a motorcycle, if it's over speeding, it will buzz. So, I'm still on papers so can't really test it

acoustic sand
#

For posterity's sake, erasing the Feather M4 Express and reinstalling circuitpython worked. It now mounts properly.

north stream
fossil fossil
#

hi ...
this is my Arduino [ESP32 - MPU 6050] project ...
how can i make similar that on Visuino?
thanks a lot. 🙏

📎 MPU6050.zip
green thunder
#

Does anyone know (or know where I can find out) what the GPIO are for the on-board QSPI flash for the Feather RP2040 (or really any of the Adafruit RP2040 boards)? I'd like to use it in Arduino with the Philhower core but I've had a difficult time finding this information.

leaden walrus
green thunder
#

Are those the GPIO though? As far as I can tell from the rest of the schematic, those numbers don't necessarily correlate to GPIO 🤔

solemn cliff
#

I'm not sure what you want to do

green thunder
#

That's actually a good question lol. What I'd like to do is just use a filesystem of some sort with the built-in flash

#

I was trying to work backwards from how I usually do it which is to use the Adafruit fork of the SdFat library. However, that doesn't work in the Philhower core, so I thought I'd explore why and how/if I could fix it.

solemn cliff
#

on the RP2040 these are dedicated pins, due to having no internal flash, the code always runs off the external flash, unlike adafruit's "express" boards where it's separate and not used by arduino by default

green thunder
#

But, if there's already some other way that works, that will work too lol

solemn cliff
#

so I don't know how you access the flash as such, but I would assume it's already handled at some level and you don't need to worry about the pins

green thunder
green thunder
#

Thanks for trying to help y'all, I really appreciate it odentvOdenthx

#

Got something! It looks like what I'm supposed to do here is use LittleFS instead of the Adafruit SDFat fork. In the Philhower core you can choose how much of the flash you'd like to dedicate to the firmware and how much to the filesystem. I chose the size I wanted to use, and successfully built and ran the SpeedTest example, which performs the basic filesystem operations.

stable forge
green thunder
stable forge
#

ah, I see Neradoc said that already

green thunder
#

I still appreciate it. I was banging my head against this for awhile, and I always appreciate offers to help 🙇

stable forge
#

I forget to scroll discord when I see a query and hit the reply button 🙂

north stream
#

Same. 🤦🏾

native dagger
#

trying to understand some C++ code for shutting down a pi on a button press:

</pre>
<pre>#include <wiringPi.h>
#include <stdio.h>
#include <unistd.h>
#include <linux/reboot.h>
 
int ioPin = 7; // GPIO04, physical pin 7
 
int main (void) {
    wiringPiSetup ();
    pinMode (ioPin, INPUT);
    printf("c-watch v0 is now running.\n");
    while(1) {
        pullUpDnControl(ioPin, PUD_DOWN);
        if (!digitalRead(ioPin)) {
            printf("LOW\n");
            break;
        }
        delay(1000);
    }
    printf("Got signal, starting shutdown.\n");
    // Would like to change to dbus at some point
    system("shutdown -P now");
    delay(500);
    return 0;
}</pre>
<pre>

What do the </pre> and <pre> commands do?

leaden walrus
#

that's html, not part of the code

#

probably copy-paste error from a webapge

native dagger
#

ahhh ok

leaden walrus
#

it's commonly used to surround code elements, so that's why it's there in the first place

native dagger
#

It looked like HTML but I don't know much cpp so I had a confuse

#

what would be a reason to use C++ over python for this? Speed?

leaden walrus
#

that'd be a general reason for c++ vs python

native dagger
#

ok cool

leaden walrus
#

but in this case, it's not critical, so not really necessary

#

a python script would work just as well

native dagger
#

on a pi, where would printf in C++ or print in python go?

leaden walrus
#

do you mean what are the python equivalents for printf and print ?

native dagger
#

no sorry, where does the output go

#

like if I add a bunch of print statements to my code that's running on start on the pi, am I just shouting into the void?

leaden walrus
#

in both cases, C++ and Python, they'd go to standard out

native dagger
#

hmm let me google that

leaden walrus
#

you can end up shouting into the void, if for example you run things a service (sysemd)

native dagger
#

yeah I'm using systemd

#

Having an issue with it actually but that's in the other channel

leaden walrus
#

then you'd want to look into how handling standard out is dealt with

native dagger
#

ok cool. I don't need to monitor print statements, was just curious

leaden walrus
#

there's probably a more specific way to log message when using systemd, so it'll show up nice when running systemctl status etc.

#

but i actually don't know the specific details, i've only done very simple services with systemd

native dagger
#

No worries, I don't need to log anything. My script that runs on start plays music so it's easy to tell if it's running or not

leaden walrus
#

yep. and a basic "is it running or not" can be determined without any specific prints.

#

just the basic output from status will let you know

native dagger
gilded gazelle
#

trying to run the selftest on a pyportal-titano
https://github.com/adafruit/Adafruit_Learning_System_Guides/tree/main/PyPortal_Titano_ArduinoSelfTest
and compile fails with
https://pastebin.com/Ej3TtTeA

GitHub
Adafruit_Learning_System_Guides/PyPortal_Titano_ArduinoSelfTest at ...

Programs and scripts to display "inline" in Adafruit Learning System guides - Adafruit_Learning_System_Guides/PyPortal_Titano_ArduinoSelfTest at main · adafruit/Adafruit_Learning_...

Pastebin
google atomic - 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.

gilded gazelle
#

downgraded to wifinina-1.8.0 works now

quartz anvil
#

Hi

#

Could someone help me please?

#

here plzplzplz

#

nvm i understood as i drew it xd

terse summit
#

Hey guys, I need help with the BNO055 IMU. I have two servos and the IMU on an arduino mega 2560 and I am unable to operate the two servos simultaneously while the IMU is working. The problem seems to be with the line in the main loop:

bno.getEvent(&event);

As soon as this line is uncommented, only one servo works. Any idea what the problem might be? Also, if one of the servo is plugged with the IMU working, it jitters. Using Adafruit_TiCoServo.h solved the jittering, but not the simultaneous servos problem.

#

I am done working on this for today and will get back at it tomorrow, in the meantime if you have any suggestions it would be greatly appreciated!

#

my main loop is set at 100Hz, maybe its too fast?

verbal hill
#

This is probably a ridiculously simple question, but I'm confirming from the Python world into Arduino by following the guides...
q: is it possible to have a text or ini file or similar on the device that your sketch can read from? My guess is no, after you compile and upload, the board doesnt appear in windows like it did when it was Circuit Python

solemn cliff
#

it uses Circuitpython to format the external flash as a drive, then overwrites with Arduino code that uses tinyUSB to present the files as a flash drive to the PC

verbal hill
#

But if it overwrites the Arduino code, then you need to reflash to get your program going?

solemn cliff
#

first you flash with CP to create the drive, but you do it only once, then you replace with the arduino code, which then accesses the drive

#

subsequent updates to the arduino code will not erase the drive

verbal hill
#

hmmm interesting. Im reading through the sample. Im going to have to read it a few times to get this to sink in

#

I'm coming from the QTPY / NeoKey project (CP wont run this, so I'm here in Arduino) -- simply, my idea was having a text file with 4 lines, a "key" if you will for each line, thus an easy way to customize the macro you want. It sounds like, in theory I should be able to do this with the ardunio code using this hack

vivid rock
#

In addition, TinyUSB library allows you to access the formatted flash filesystem from a computer as if it were a USB memory stick

verbal hill
#

Ok, thanks both - I'm making notes here; will giver it a try

fair sequoia
#

When using the Adafruit PCA9685 16 channel PWM Servo Driver, how do you map servos to their channels on the board (when using the Ardunio IDE)? I have been looking through this tutorial https://learn.adafruit.com/16-channel-pwm-servo-driver?view=all#using-the-adafruit-library however as far as i can see it doesn't mention it. Any other example code i've looked through only does a sweep of all the channels on the board and never references a single channel. I've been looking all day so any help is greatly appreciated.

cedar mountain
fair sequoia
#

I get the error that 'setPWM' was not declared in this scope

livid osprey
fair sequoia
livid osprey
#

No, that's just the type the argument expects.

fair sequoia
#

So all i need is setPWM(0) ?

livid osprey
#

No, you do need on time and off time as well.

#

getPWM() is single-argument, but setPWM() must have all three arguments.

cedar mountain
#

It would probably be fruitful to look at how the function is used in the example code.

fair sequoia
fair sequoia
livid osprey
#

No, getPWM would return the PWM reading of the pin. The equivalent of attachment is done when instantiating Adafruit_PWMServoDriver().

fair sequoia
#

Ah yes that makes sense. Do I still need to turn the PWM output On and Off if im listening for a variable through Serial though, and if so what would they be?

livid osprey
#

The on and off times would be the time your PWM turns on and off relative to its 4096-tick cycles. This timing controls your duty cycle, so you absolutely need to set these based on whatever variable you're listening for.

fair sequoia
#

Where can i learn about Duty Cycles then? I saw the tutorial mention something about it however it was for controlling LEDs so i didn't think it was applicable

livid osprey
#

PWM, or Pulse-Width-Modulation, is the process of rapidly switching a signal on and off to control the amount of power to a device. The duty cycle is how long the signal is on for, so it's essentially the proportion of current used to power a device. It's often used to create a pseudo-analog output on a digital pin. https://en.wikipedia.org/wiki/Pulse-width_modulation

Pulse-width modulation

Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The lon...

glad gull
#

Hi, i am thinking in make led tubes with ws2813 led strips
Like that:
(FOTO 5)
Every tube have an input and output
Connected like that photo:
(FOTO1)

The first problem is that the ws2813 led strips if two LEDs burns consecutive, the rest of the LED strip after the two consecutive burned LEDs stop working , i lost all the tubes if this happen.
(I cant Weld leds or change the tube, because its in the ceiling)
Leaving the whole setup like this:
(FOTO2)

I can do this?
(FOTO3)
In this photo what I do is that the data pin of the LEDs is directly connected to the Arduino and does not pass through the rest of the LED strips of the other tubes, so that if two consecutive LEDs are burned, only said tube turns off and the rest will continue to work, is it possible to do this? but every tube needs to work independent(with other colors)

Captura_de_pantalla_2021-11-15_180121.png
fair sequoia
livid osprey
#

Not sure what an appropriate resistance would be, but I believe that snap apart keypad used something on the realm of 2.2kohms?

#

Also, in the occasion of the burned tube, the data will shift past the burned tube to the next pipe, if that offset would bean issue for your application.

crisp folio
#

Foto 3 is also connecting the next strip in the wrong direction

glad gull
glad gull
green thunder
#

Has anyone tried using the TX/RX pins on the new Feather ESP32-S2? Not only can I not seem to use them for UART, they don't seem to work at all for me 🤔

lost kraken
#

does the flora have analog in?

cedar mountain
lost kraken
#

thanks

uncut kindle
#

Hey I'm having some issues trying to upload code to an Adafruit Feather M4 Express from the Arduino IDE, and I can't find much about it online other than people mentioning that the issue seemingly solved itself

#

I have my Adafruit hooked up via USB to my device

#

Right now I'm just trying to upload a mostly empty file to the chip to get it working

# 
Arduino: 1.8.16 (Windows 10), Board: "Adafruit Feather M4 Express (SAMD51), Enabled, 120 MHz (standard), Small (-Os) (standard), 50 MHz (standard), Arduino, Off"

Sketch uses 10876 bytes (2%) of program storage space. Maximum is 507904 bytes.

Device       : ATSAMD51x19

Version      : v1.1 [Arduino:XYZ] May 17 2020 17:56:23

Address      : 0x0

Pages        : 1024

Page Size    : 512 bytes

Total Size   : 512KB

Planes       : 1

Lock Regions : 32

Locked       : none

Security     : false

BOD          : false

BOR          : true

Write 11132 bytes to flash (22 pages)

[==============================] 100% (22/22 pages)

Done in 0.204 seconds

Verify 11132 bytes of flash

[========                      ] 27% (6/22 pages)

SAM-BA operation failed

An error occurred while uploading the sketch



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

This is the error log I get

#

Then upon failing my device indicates that a device disconnects, and it suddenly the board appears on COM4 instead of COM5

#

Does anyone know what's up with this?

rough torrent
#
  1. enable verbose output during compilation and upload and paste in the output here
  2. try unplugging the feather from the breadboard and upload again so that nothing is connected except usb

windows likes to change com ports so it's normal

uncut kindle
#

Over 2000 characters

#

This also happens seemingly at random

#

It also can't find the board anymore

rough torrent
#

are you pressing the reset button? if you double-press the reset button then it goes into uf2 bootloader mode which allows you to drag uf2 files to "upload" them (which actually just flashes them)

#

it fakes a disk drive so you can upload a special file to flash it

uncut kindle
#

I didn't this time, just unplugged the cable and plugged it back in the same port

rough torrent
#

can you double click the reset button to get into the bootloader mode?

#

(a drive should pop up, ignore it)

uncut kindle
#

It did yeah

rough torrent
#

then try to upload over the new serial port (which won't have a name like "Adafruit Feather M4 express" this time)

uncut kindle
#

It has a name like that still

rough torrent
#

close the port menu and open it back up to refresh it

#

like hover away

#

then hover back

#

it's weird

uncut kindle
#

Still showing up

#

Should I double reset again?

rough torrent
#

the drive? yea try

#

also have you tried restarting lol

uncut kindle
#

Arduino itself?

rough torrent
#

the computer*

uncut kindle
#

No I have not

#

Oh

#

No to that either

rough torrent
#

do you have antivirus other then windows defender

uncut kindle
#

Yes

#

Would it be stopping this?

rough torrent
#

maybe, some of them do that

livid osprey
#

Some programs are known to cause issues with COM ports. Offhand, I know Ultimaker Cura does that...

uncut kindle
#

Restarted and it's still showing up under COM4

#

I'll try disabling security for a sec I guess?

#

I should also mention that the red LED marked #13 on the chip is now fading on and off

#

Am I missing some file that allows it to verify the uploaded files or something?

leaden walrus
#

red fading would indicate bootloader mode. neopixel should also be green?

#

and you should see FEATHERBOOT folder

green thunder
# green thunder Has anyone tried using the TX/RX pins on the new Feather ESP32-S2? Not only can ...

I finally figured this out. I'm assuming it's just because the Feather is so new, but it looks like the pins RX/TX pins aren't set up correctly in Arduino. I had to manually tell Serial1.begin which pins to use:

Serial1.begin(115200, SERIAL_8N1, 38, 39);

Actually thanks to the #circuitpython-dev channel, I was able to trace from a recent PR updating the neopixel power pin name to the file where all the pins are defined for CircuitPython and figure out what the correct pins were 😄

leaden walrus
#

@green thunder weird. was that the one with or without BME280? probably doesn't matter though.

green thunder
#

It's the one without

leaden walrus
#

thanks. gonna take a look...

green thunder
#

Thanks @leaden walrus 😄

leaden walrus
#

@green thunder yah, i'm seeing same thing. you're probably also correct about it being because of new board. i'll pass this on.

#

at least makes sense that it works when code matches hardware 🙂

green thunder
#

Thanks for verifying!

late raptor
#

Hi just curious if anyone has any examples of midi in the seesaw library?

stoic scroll
#

Hi all, I am hoping to emulate EEPROM behaviour on Feather nrf52840, any examples to read and write variables instead of entire file? Found this , but not enough information to get it working. I would appreciate any help. https://github.com/adafruit/Adafruit_nRF52_Arduino/tree/master/libraries/Adafruit_LittleFS/src/littlefs

GitHub
Adafruit_nRF52_Arduino/libraries/Adafruit_LittleFS/src/littlefs at ...

Adafruit code for the Nordic nRF52 BLE SoC on Arduino - Adafruit_nRF52_Arduino/libraries/Adafruit_LittleFS/src/littlefs at master · adafruit/Adafruit_nRF52_Arduino

low verge
#

Hi, I want to know. If we brutally shut down the Atmega board is it dangerous ?

livid osprey
#

Brutally? Are you shutting it down with a chainsaw?

low verge
#

I mean if a power outage occurred when it’s in function

livid osprey
#

Oh, only if it occurs while writing data.

#

And at the worst case, it's usually corrupted data that can be cleaned up later.

low verge
#

Ok Thanks

hollow imp
#

Hello, I allow myself to come back to you because I would like to know if it is possible to communicate with this serial port by an arduino:

unknown.png
north stream
livid osprey
#

It's generally not a matter of "can" or "can't", it's usually more a question of "how easily..."

hollow imp
hollow imp
livid osprey
#

Nono, don't be sorry. I was just making a point most people don't realize.

#

The only limitation that Arduino struggles with in certain cases is speed. 16MHz is more than enough for most applications, but it's the only hard restriction in the case of a serial application. Other incompatibilities such as logic voltage differences can be worked around with supplementary external circuitry.

hollow imp
livid osprey
#

I would be surprised if it wasn't, haha.

#

No, the Arduino is certainly capable, it's more a question of what kind of signals you need to get the desired outputs.

#

Definitely doable.

hollow imp
#

it's a port serie 8bit cmos

livid osprey
#

Yep, and looks like it uses standard 5V logic, so it shouldn't require any external voltage shifting.

hollow imp
#

Do you have a site or an example for me?

north stream
hollow imp
pine bramble
#

What do you do if you ever had a mess like this of wires on your arduino/breadboard ?

lolwiring.jpg