#help-with-arduino

1 messages · Page 106 of 1

leaden walrus
pallid grail
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Yep

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So it looks clean and happy to the user in the board guide.

leaden walrus
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so it does end up being dedicated examples. the template just provides copy pasta.

pallid grail
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But started as a giant docstring with instructions and a nonexistant variable in the setup.

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Yep!

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Exactly

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Limor said templates were supposed to be able to be board-specific, and I took that very seriously. There's no multiboard copypasta in the examples once they're submitted to Learn.

leaden walrus
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ok. understanding the whole show a little better.

pallid grail
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We're creating a board-specific experience for folks, vs the current CP Essentials guide which tries to show for every board... oof.

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To the point of replacing the current CP Essentials pages in guide as the templates roll out.

leaden walrus
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we can come up with non-working templates that contain the 99% same code

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and then guide author must add board specific stuff

pallid grail
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Yep

leaden walrus
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which will just be like those few lines up top

pallid grail
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Right!

leaden walrus
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and even the extra stuff like power

pallid grail
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Exactly

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Which won't be included in the boards that don't need it, etc.

leaden walrus
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ok, let's make a new Arduino_Templates folder

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and can work up a TFT something and add it there

pallid grail
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Excellent

leaden walrus
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or can just do it all in one PR i guess

pallid grail
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I'm currently editing the sketch now

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to have placeholders.

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"currently" "now". Redundant.

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It's a local copy of it, not the lib copy

leaden walrus
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ok. cool. only question is if that's the best example? vs. something simpler?

pallid grail
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Yeah checking in with Limor again

leaden walrus
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like the button locating adds complexity

pallid grail
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As long as the display is bigger than this one, it'll at least be on the screen.

leaden walrus
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vs. just drawing lines from WIDTH to HEIGHT

pallid grail
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Ah true

leaden walrus
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and saying "HELLO" at (0,0)

pallid grail
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Which it does earlier in the example.

leaden walrus
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you could add #defs for WIDTH and HEIGHT to template

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that'd be a good approach

pallid grail
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OK, that's what I was wondering. Making it easier to find what to change because it's all at the beginning.

leaden walrus
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i was over-thinking it - so it'd be much more auto-magic, with #defs in core

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you want to keep punching at it?

pallid grail
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Yep!

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I'll post it here when I think I found everything and ping you to verify.

leaden walrus
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ok

pallid grail
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Do #defines go after the #includes?

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Before the display setup..

leaden walrus
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put them after the includes

pallid grail
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ok

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And it's like #define WIDTH 240 ?

leaden walrus
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yep

pallid grail
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Thanks!

pallid grail
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wait need to make the #defines more vague. But that's the idea.

leaden walrus
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yah

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#define TFT_WIDTH WAFFLES_ARE_YUMMY

pallid grail
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Hah! Yes

leaden walrus
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looks good for an initial pass

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ROTATION -> TFT_ROTATION

pallid grail
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Good call

leaden walrus
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probably. but 90 CW or CCW?

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easy to just figure out by trial/error

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it might be doc'd in the GFX stuff though

pallid grail
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Good point.

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@leaden walrus Found the most info in the GFX lib. x 0 thru 3 corresponding to 4 cardinal rotations That's it though. Nothing about which direction is which.

leaden walrus
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at least now you know they aren't pigeon rotations

pallid grail
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😄 Nice

pallid grail
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@leaden walrus Any other suggestions? Spent the last however long trying to figure out how to submit it to Learn and have it not fail CI because it won't compile. Jeff suggested doing a .ino.txt file, which seems like the best option. I don't understand the arduino-ci build_platform.py file well enough to figure out how to add something that skips all builds. You can skip one, or you can test one only, those are your options. Neither of which works here.

📎 feather_tft_graphics_test.ino
leaden walrus
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.none.test.only

pallid grail
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WAT

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🤯 We went over that CI file a bunch of times.

leaden walrus
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but should mention that also

pallid grail
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Yeah definitely.

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Thank you!!!

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if platformname != "none" sneaky.

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@leaden walrus But any other suggestions? Or does it look solid to you.

leaden walrus
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oops. went off to make a pr. looking now.

pallid grail
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No worries, thanks

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Oh I missed changing TFT_POWER_PIN_NAME in the place it should be updated.

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Fixed.

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And changed it to TFT_POWER_PIN_NAME in the comment.

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since it might not always have I2C involved.

leaden walrus
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looks good

pallid grail
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Ok thanks!

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Needs to be in a directory with the same name for things to be happy, right? Not that it matters because it's template code but might as well follow convention.

leaden walrus
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i don't think it matters for the ci

pallid grail
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Ok. Thanks for all your help today!

uncut kindle
#

Maybe someone here can help me. I had a setup with an Adafruit Feather M4 Express hooked up to a couple other components and everything was functioning as intended. I had a small program set up to take inputs from a RC receiver and translate them into the angle of a servo and the speed of a motor. I tried writing some code to integrate another device, an Adafruit 9-DOF Orientation IMU Fusion Breakout - BnO08x, and copied some code documented here https://learn.adafruit.com/adafruit-9-dof-orientation-imu-fusion-breakout-bno085/uart-rvc-for-arduino

Adafruit Learning System
Adafruit 9-DOF Orientation IMU Fusion Breakout - BNO085

What's your vector, Victoria? With the BNO085 you're HEADING in the right direction

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Initially my Serial monitor was outfitted to 9600 baud, but for this example it's 115200, so I changed it for this example, removed all the code for my other examples, just had 1 Serial monitor and tried to print out the devices information without using the serial plotter

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Immediately my IDE crashed, and now I can't consistently upload anything to the chip, even a blank file. It's always the same or a similar error:

Arduino: 1.8.16 (Windows 10), Board: "Adafruit Feather M4 Express (SAMD51), Enabled, 120 MHz (standard), Fast (-O2), 50 MHz (standard), Arduino, Off"

Sketch uses 14212 bytes (2%) of program storage space. Maximum is 507904 bytes.

Device       : ATSAMD51x19

Version      : v1.1 [Arduino:XYZ] Feb 21 2021 21:10:09

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 14468 bytes to flash (29 pages)

[==============================] 100% (29/29 pages)

Done in 0.222 seconds

Verify 14468 bytes of flash

[================              ] 55% (16/29 pages)An error occurred while uploading the sketch

[==============================] 100% (29/29 pages)

Verify failed

Page errors: 1

Byte errors: 1



This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
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I can't find any documentation about this online and the only thing I can think to do is completely reinstall the IDE, which I really don't want to do

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Any advice?

main hill
#

HEY, got a question regarding arduino and adafruit IO. So currently using MKR1010 to pull data into AWS IOT core. This is my first look at adafruit IO and i am curious what device should i use to send data from MKR1010 directly to my adafruit IO dashboard? Or is the MKR1010 able to do this alone? Any help would be extremely helpful. Everything i have found online is specific to certain projects.

livid osprey
# main hill HEY, got a question regarding arduino and adafruit IO. So currently using MKR101...

Disclaimer: I have no personal experience with this myself, so if someone with more experience can provide a more detailed answer....

I'm no expert on the software side of things, but from a hardware perspective, the MKR1010 should be perfect for sending data directly to your Adafruit IO dashboard. I don't see a lot of projects for it online, but the u-blox WiFi module is basically an ESP32 inside, so it should work with the AdafruitIO library. If the MKR1010 board definition isn't there, though, you may have to manually define the pins for the Wifi as if you were using an external Airlift?

stable forge
# uncut kindle Maybe someone here can help me. I had a setup with an Adafruit Feather M4 Expres...

Try uploading a simple Blink program or similar. Double-click to get the BOOT drive to show, and then choose the right port from the Port menu. You might also try disconnecting anything from the Feather to make sure something else is not affecting it.

I can think of several reasons for this: 1. The board you're uploading to is not a Feather M4. 2. You have multiple boards connected and you're uploading to the wrong one.

lucid minnow
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hello, has anybody here used the famous InkShield with a non-Arduino UNO size board? If I'm reading the documentation right, the AUX-IN port should allow me to connect it to any other microcontroller's digital pins (emphasis on digital, because I want to use a device that doesn't have analog pins).

pallid grail
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@leaden walrus We don't usually get into code explanations for Arduino examples. Should I stick with that? Or change it up and explain this graphics test example? Or something else..? This template page seems super short. I guess the others are pretty short too.

leaden walrus
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could explain the setup lines maybe?

pallid grail
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Ah hmm ok

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Have to use ample template areas for that. Not a problem though.

leaden walrus
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"create an instance passing in pins"

 Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

"turn on power and backlight"

  // turn on backlite
  pinMode(TFT_BACKLITE, OUTPUT);
  digitalWrite(TFT_BACKLITE, HIGH);

  // turn on the TFT / I2C power supply
  pinMode(TFT_I2C_POWER, OUTPUT);
  digitalWrite(TFT_I2C_POWER, HIGH);
  delay(10);

"init the display with width/height and optionally rotation, etc."

   tft.init(135, 240);
   tft.setRotation(3);
pallid grail
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Ooh thank you.

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I would have tried to be specific about everything, which would have meant template areas for the whole thing.

pallid grail
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Uff. Going to have to include switching around the init in a few of these examples if they are eventually intended for this template because the setup isn't in the same order.

uncut kindle
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Sometimes it even works

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It seems like the longer the code is the more of a chance it has to fail verification

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I tried uninstalling the adafruit 2.5.0.0 driver according to its instructions, looked up the drivers and they're already not there

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Then I install it and the drivers they say to look up are still not there

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I don't have multiple boards connected, I'm trying to upload in featherboot mode

uncut kindle
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1 in like 50 tries it worked

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Something is wrong with how my board and computer are communicating

stable forge
uncut kindle
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Will do, thanks chief

dense rain
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Anyone know anything about Neopixel lightsabers? I'm trying to find a way to use Lighsaber styles with Neopixel Led strips using an Arduino or something and if that would even be possible. From what I could find from my meager results in attempting to research this. What I mean by this is that the proffieboard uses an Arduino foundation for its OS (from what I could find)

north stream
dense rain
north stream
#

I'm not sure what you mean by "fonts" in this context.

dense rain
crystal frigate
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When I'm wiring multiple components to my arduino via SPI, do I need to do it in a certain way? Can I hook up multiple at all?

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for example... I'm running https://www.adafruit.com/product/4899 and https://www.adafruit.com/product/364 at the same time.

Adafruit SPI Flash SD Card - XTSD 512 MB

This breakout is for a fascinating chip - it looks like an SPI Flash storage chip (like the GD25Q16) but its really an SD card, in an SMT chip format. What that means is that you wire up ...

PN532 NFC/RFID controller breakout board

The PN532 is the most popular NFC chip, and is what is embedded in pretty much every phone or device that does NFC. It can pretty much do it all, such as read and write to tags and cards, ...

cedar mountain
#

With SPI buses, the SCK, MISO, and MOSI lines can be shared, but each device will need a separate CS pin. That's how it determines which device is using the bus.

crystal frigate
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I'm a bit lost, sorry. Here's my current schematic of the PN532 but im trying to add my XTSD board

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where's the "CS" pin on the PN532?

cedar mountain
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Sorry, NSS is another name for it. CS is "chip select" and SS is "slave select", with the N to indicate it's active-low.

crystal frigate
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So that’s a pin that’s not being used. Do I have to set that up in my code differently?

cedar mountain
#

Yes, typically you'd provide the pin to the driver library when you initialize the device.

crystal frigate
#

Interesting. That’s not something I did

cedar mountain
# 
class Adafruit_PN532 {
public:
  Adafruit_PN532(uint8_t clk, uint8_t miso, uint8_t mosi,
                 uint8_t ss);                 // Software SPI
  Adafruit_PN532(uint8_t irq, uint8_t reset); // Hardware I2C
  Adafruit_PN532(uint8_t ss);                 // Hardware SPI```
crystal frigate
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Maybe? I’ll have to check my code haha

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However, I know what I need to change so I can properly implement my other parts. Thanks!

haughty cosmos
#

He'll all I'm trying to make a power button for arduino the idea is I press the button it turn on the arduino and then the pin 4 holds a transistor open to keep it on then if the button is pressed for more then 3 seconds it arduin will turn off pin 7 checks the state of button. I got it working with leds but when I replaced the LEDS with diods it stopped working any help or advice would be great. Thank you

20220224_073528.jpg
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int keeper = 4;
const unsigned long longKeyPressCountMax = 3000;
unsigned long startedToPress = 0;
unsigned long PressDuration = 0;
bool power = HIGH;
bool powerButtonState = false;
const byte sensor = 7;

void setup() {
digitalWrite(keeper, HIGH);
pinMode(keeper, OUTPUT);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(sensor, INPUT);

 attachInterrupt(digitalPinToInterrupt(sensor), setPowerButtonState, CHANGE);

}

void setPowerButtonState(){
powerButtonState = digitalRead(sensor);

}

void loop() {
if(powerButtonState){
tryToTurnOff();
} else {
//just for testing
startedToPress = 0;
digitalWrite(LED_BUILTIN, LOW);
}
}

void tryToTurnOff(){

 if(startedToPress > 0){
     PressDuration = millis() - startedToPress;
     if(PressDuration >= longKeyPressCountMax){
         //just for testing
         digitalWrite(LED_BUILTIN, HIGH);
         power = LOW;
     }
 }else {
     startedToPress = millis();
 }

digitalWrite(keeper, power);
}

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Pin 5 is actually pin 7 I forgot to update my drawing

livid osprey
#

Though if you can explain in more detail on what way it’s behaving now, maybe we can isolate the issue more effectively.

haughty cosmos
#

Okay I had the diodes the right way so I'll look Into the forward voltage.
I click the button and it works once but then the power light on the arduino gets real dim and the built in led starts flashing @livid osprey

elder hare
#

i know i have asked this befor !!! but im still stuck

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

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

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

files **controller **- **Settings **- main.cpp (to look at)

So each Strip has it`s own set of settings :S so i dont see where the problem is...

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

#if NUM_CHANNELS >= 1
strand1.updatePatternSettings(*strand1_cled, settings[0]);
#endif

#if NUM_CHANNELS >= 2
strand2.updatePatternSettings(*strand2_cled, settings[1]);
#endif

#if NUM_CHANNELS >= 3
strand3.updatePatternSettings(*strand3_cled, settings[2]);
#endif

#if NUM_CHANNELS >= 4
strand4.updatePatternSettings(*strand4_cled, settings[3]);
#endif

#if NUM_CHANNELS >= 5
strand5.updatePatternSettings(*strand5_cled, settings[4]);
#endif

#if NUM_CHANNELS >= 6
strand6.updatePatternSettings(*strand6_cled, settings[5]);
#endif

#if NUM_CHANNELS >= 7
strand7.updatePatternSettings(*strand7_cled, settings[6]);
#endif

#if NUM_CHANNELS >= 8
strand8.updatePatternSettings(*strand8_cled, settings[7]);
#endif
GitHub
GitHub - MythicalForce/MNC

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

velvet lion
#

I'm having trouble communicating with the Adafruit I2C Rotary Encoder and an Arduino Nano Connect RP2040

I'm trying to get the example code running but seem to be having trouble with hardware IDs within Adafruit_seesaw.cpp & Adafruit_I2CDevice.

I've tried to outline what I've learned so far here: https://forums.adafruit.com/viewtopic.php?f=19&t=188805

I'm hoping someone reading this might have crossed this problem or something similar in the past!

Adafruit customer service forums • View topic - Debugging the SeeSa...
cedar mountain
# elder hare i know i have asked this befor !!! but im still stuck So i have 2 led strips co...

Yeah, it looks like you've got a single global variable for each pattern, so every time you update a strip using that pattern, the pattern global will be changed:```c++
Pattern *currentPattern[] = { &solidcolor, &theaterchase, &juggle, &runninglights, &cylon, &mitosis, &twinkle, &colorstacking };

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

#

Did you mean to have these variables as part of the controller class?

elder hare
cedar mountain
# elder hare huh?

It looks like you might have wanted currentPattern to be a private variable of the LEDController class instead of a global.

elder hare
#

oooooh

elder hare
# cedar mountain It looks like you might have wanted `currentPattern` to be a private variable of...

hmmm

class LEDController
{

public:
  void updatePatternSettings(CLEDController& c, const Settings& s);

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

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

why do i get

too many initializer values
cedar mountain
#

I'm not sure. What line is the error flagged on?

elder hare
# 
Pattern *currentPattern[] = { &solidcolor, &theaterchase, &juggle, &runninglights, &cylon, &mitosis, &twinkle, &colorstacking };
cedar mountain
#

You might try giving it an explicit [8] array size, though that shouldn't be needed.

elder hare
# cedar mountain You might try giving it an explicit `[8]` array size, though that shouldn't be n...

hmm did i do something wrong here?
controller.h

class LEDController
{

public:
  LEDController();
  void updatePatternSettings(CLEDController& c, const Settings& s);

private:
  Pattern *currentPattern[8];

};

controller.cpp

#include "controller.h"

#include "pattern/solidcolor.h"
#include "pattern/theaterchase.h"
#include "pattern/runninglights.h"
#include "pattern/cylon.h"
#include "pattern/mitosis.h"
#include "pattern/juggle.h"
#include "pattern/twinkle.h"
#include "pattern/colorstacking.h"

LEDController::LEDController()
{
  Solidcolor solidcolor;
  TheaterChase theaterchase;
  Juggle juggle;
  RunningLights runninglights;
  Cylon cylon;
  Mitosis mitosis;
  Twinkle twinkle;
  ColorStacking colorstacking;

  currentPattern[0] = &solidcolor;
  currentPattern[1] = &theaterchase;
  currentPattern[2] = &juggle;
  currentPattern[3] = &runninglights;
  currentPattern[4] = &cylon;
  currentPattern[5] = &mitosis;
  currentPattern[6] = &twinkle;
  currentPattern[7] = &colorstacking;
}

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

now it crashes over and over

cedar mountain
#

The solidcolor variables are stack-local in the constructor function, so they disappear when it exits.

elder hare
#

this Solidcolor solidcolor; or this currentPattern[0] = &solidcolor;

cedar mountain
#

The Solidcolor solidcolor; declaration. That's not a class variable, just a function-local temp variable. So the pointer in the currentPattern array points to random memory after the function terminates.

elder hare
#

so all of them should be inside the class?

cedar mountain
#

Yes.

elder hare
#

i hate these errors

.pio\build\esp32dev\src\main.cpp.o: In function `ColorFraction(CRGB, float)':
C:\Users\Krist\Desktop\MNC 2022/src/draw.h:9: multiple definition of `ColorFraction(CRGB, float)'
.pio\build\esp32dev\src\controller.cpp.o:C:\Users\Krist\Desktop\MNC 2022/src/draw.h:9: first defined here
.pio\build\esp32dev\src\main.cpp.o: In function `DrawPixels(CLEDController&, float, float, CRGB)':
main.cpp:(.text._Z10DrawPixelsR14CLEDControllerff4CRGB+0x0): multiple definition of `DrawPixels(CLEDController&, float, float, CRGB)'
.pio\build\esp32dev\src\controller.cpp.o:controller.cpp:(.text._Z10DrawPixelsR14CLEDControllerff4CRGB+0x0): first defined here
#

i can never figure them out -.-

#

they all stem from the file #include "draw.h"

#

being included in all the patterns

cedar mountain
#

Yeah, you should probably move those functions to a draw.cpp file, and just have the declarations in the header.

elder hare
# cedar mountain Yeah, you should probably move those functions to a draw.cpp file, and just have...

so it is still crashing
controller.h

#pragma once

#include <FastLED.h>
#include "settings.h"
#include "pattern.h"
#include "enum.h"

#include "pattern/solidcolor.h"
#include "pattern/theaterchase.h"
#include "pattern/runninglights.h"
#include "pattern/cylon.h"
#include "pattern/mitosis.h"
#include "pattern/juggle.h"
#include "pattern/twinkle.h"
#include "pattern/colorstacking.h"

class LEDController
{

public:
  LEDController();
  void updatePatternSettings(CLEDController& c, const Settings& s);

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

private:
  Pattern *currentPattern[];

};

controller.cpp

#include "controller.h"

LEDController::LEDController()
{
  currentPattern[0] = &solidcolor;
  currentPattern[1] = &theaterchase;
  currentPattern[2] = &juggle;
  currentPattern[3] = &runninglights;
  currentPattern[4] = &cylon;
  currentPattern[5] = &mitosis;
  currentPattern[6] = &twinkle;
  currentPattern[7] = &colorstacking;
}

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

@cedar mountain there we go 🙂

#

it works

#

ty for the help!

cedar mountain
#

You added the [8] to the array declaration, I presume?

elder hare
#

ye 🙂

elder hare
#

@cedar mountain can you look at alittle problem i have?

#

so im taking pattern Cylon as an example! here the bar length of the cylon is 4

This is the DrawPixel function

void DrawPixels(CLEDController& controller, float fPos, float count, CRGB color)
{
    CRGB* leds = controller.leds();
    int size = controller.size();

    float availFirstPixel = 1.0f - (fPos - (long)(fPos));
    float amtFirstPixel = min(availFirstPixel, count);
    float remaining = min(count, size-fPos);
    int iPos = fPos;

    if (remaining > 0.0f)
    {
        CRGB c = ColorFraction(color, amtFirstPixel);
        CRGB& p = leds[iPos++];
        p.r = max(p.r, c.r);
        p.g = max(p.g, c.g);
        p.b = max(p.b, c.b);
        remaining -= amtFirstPixel;
    }

   // Now draw any full pixels in the middle

    while (remaining > 1.0f)
    {
        leds[iPos++] += color;
        remaining--;
    }

   // Draw tail pixel, up to a single full pixel

    if (remaining > 0.0f)
    {
        CRGB c = ColorFraction(color, remaining);
        CRGB& p = leds[iPos];
        p.r = max(p.r, c.r);
        p.g = max(p.g, c.g);
        p.b = max(p.b, c.b);
    }
}

and this is the cylon pattern

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

        for ( float i = 0; i < PatternBarLength; i++ )
        {  
            float pi = PatternPosition + i;
            DrawPixels(c, pi, 1, PaletteMode( c, pi, PatternBrightness ) );
        }
        applyTailEffect(leds, size);
    }

so what is happening is the 3 pixels in the middle of the bar length of the cylon is flickering (looks like it draws multiple pixels ontop of each other) or something :S

cedar mountain
#

Hard to say offhand. I'd advise trying to slow down the pattern and see if you can spot what it's actually doing step-by-step. If that doesn't help, you might try printing out what it's setting each LED to, again to try to understand what it's actually doing.

elder hare
#

ok, so the first step by slowing it down i have done! and i can see that in the middle the pixels "pulses in brightness" :S for each step

severe latch
#

Hello. I have an nRF52840 feather and I am putting in systemoff(uint32_t pin, uint8_t) mode for low power.
I have an RTC DS3231 feather wing connected on top of it and I am trying to set an alarm to blink the red LED and wake up the main feather every 10 sec in my case but it is never waking up once in sleep mode

#

Can anyone provide me with any suggestions or tips please ? been testing for several days now but couldn't fix it

# 
/* Example implementation of an alarm using DS3231
   VCC and GND of RTC should be connected to some power source
   SDA, SCL of RTC should be connected to SDA, SCL of arduino
   SQW should be connected to CLOCK_INTERRUPT_PIN
   CLOCK_INTERRUPT_PIN needs to work with interrupts
*/
#include <RTClib.h>
#include <Wire.h>
#include <wiring.h>
RTC_DS3231 rtc;
// the pin that is connected to SQW
#define CLOCK_INTERRUPT_PIN 6
uint8_t wake = 0;
volatile byte state = LOW;
void onAlarm()
{
  state = !state;
  Serial.println("Alarm occured !");
}
void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
  // while(!Serial) delay(10);
  // initializing the rtc
  if (!rtc.begin())
  {
    Serial.println("Couldn't find RTC!");
    Serial.flush();
    while (1) delay(10);
  }
  if (rtc.lostPower())
  {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  //we don't need the 32K Pin, so disable it
  rtc.disable32K();
  // Making it so, that the alarm will trigger an interrupt
  pinMode(CLOCK_INTERRUPT_PIN, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(CLOCK_INTERRUPT_PIN), onAlarm, FALLING);

  // set alarm 1, 2 flag to false (so alarm 1, 2 didn't happen so far)
  // if not done, this easily leads to problems, as both register aren't reset on reboot/recompile
  rtc.clearAlarm(1);
  rtc.clearAlarm(2);

  //stop oscillating signals at SQW Pin  otherwise setAlarm1 will fail
  rtc.writeSqwPinMode(DS3231_OFF);

  // turn off alarm 2 (in case it isn't off already)
  // again, this isn't done at reboot, so a previously set alarm could easily go overlooked
  rtc.disableAlarm(2);

  // schedule an alarm 10 seconds in the future
  // DS3231_A1_Second --> tiggers the alarm when the seconds match. See Doxygen for other options
  if (!rtc.setAlarm1(rtc.now() + TimeSpan(0, 0, 0, 10),DS3231_A1_Second))
  {
    Serial.println("Error, alarm wasn't set!");
  } else
  {
    Serial.println("Alarm will happen in 10 seconds!");
  }   
}
# 
void loop()
{
  digitalWrite(LED_BUILTIN, state);
  // print current time
  char date[10] = "hh:mm:ss";
  rtc.now().toString(date);
  Serial.print(date);
  // the value at SQW-Pin (because of pullup 1 means no alarm)
  Serial.print(" SQW: ");
  Serial.print(digitalRead(CLOCK_INTERRUPT_PIN));
  // whether a alarm happened happened
  Serial.print(" Alarm1: ");
  Serial.print(rtc.alarmFired(1));
  
  // resetting SQW and alarm 1 flag
  // using setAlarm1, the next alarm could now be configurated
  if (rtc.alarmFired(1))
  {
    rtc.clearAlarm(1);
    Serial.println("Alarm cleared");
    rtc.disableAlarm(1);
    Serial.println("RECONFIGURING ALARM");
    rtc.setAlarm1(rtc.now() + TimeSpan(0, 0, 0, 10),DS3231_A1_Second);

  }

  systemOff(CLOCK_INTERRUPT_PIN, wake);
       
}
#

if I comment the systemOff function (last line in loop), the scheduled alarm will work as intended and power on the LED for 10 sec and then power it off for the other 10 sec

formal onyx
#

So I have my wristwatch running, and programmed, and intend to run it off a battery whereas it's powered off an Arduino right now. Question is, the battery will be non-(easily)-removable by necessity, how can I safely program the ATTINY from a 5V arduino while the lipo is powering the ATTINY simultaneously? Is it safe to just connect a common ground, and only connect the arduino pins to the four GPIO required for programming (not VCC)? Or will the 5V signal backdrive the battery through the ATTINY and cause.. undesirable consequences?

#

I suppose I should've put a diode facing away from battery positive, or a diode facing in to attiny VCC, if that were the case would it make a difference? or would I need to do a more sophisticated approach like Arduino boards do to select between DC9V/USB with an op-amp?

#

to be clear I have a battery charging circuit in place for recharging the battery but were I to connect the 5V arduino to the VCC of the attiny, it would be connected directly to the battery terminal rather than through a battery charger IC.

formal onyx
#

Also, I'm trying to dim these LEDs but I can't seem to figure out how to do it- I didn't have a spare GPIO for the enable pin on the shift registers so I can't just analogWrite the enable to dim, but everything I'm trying just makes the LEDs flicker too bad. Am I just asking for too much dimming from these super bright LEDs or am I doing something wrong? Basically was trying to add a small delay after turning on each LED, but instead of dimming it just flickers (annoyingly at the same brightness). This is the very ugly code: https://codeshare.io/oQDk8X (And I know that I should be using an RTC- there's one on the board but I need to bodge a pullup on it before I can use it...)

gaunt echo
#

Is this an acceptable method to sleep >8s using the built-in Watchdog timer? It doesn't have to be precise, I am more concerned about power consumption, whether those small 5s sleep cycles are worth while.

void loop() {
    delay(1000);
    // Do stuff...

    int sleepTime = 0;
    while(sleepTime < SLEEP_MS) {
        int sleep_ms = Watchdog.sleep(5000);
        sleepTime += sleep_ms;
    }
}```
#

I use this to sleep for 1 minute. But I currently have no way to measure power, so I am wondering if this is a bad approach. My concern is about the power consumption when the sleep ends, then immediately goes back to sleep until the desired interval. Maybe it causes a big current spike when it wakes up, I am not sure, this is my question

livid osprey
cedar mountain
gaunt echo
#

I'm just trying to get the code done, didn't want to worry about testing the battery life myself

#

I guess it will come to that at some point if the battery life is terrible

formal onyx
#

I really would like to reprogram this attiny which is running off a 3.7v lipo right now, would it be safe to do so if I do it through a level shifter, shifting to 3.3V from 5V?

#

or even possible to do something like that through a level shifter?

gaunt echo
#

But why not use a 3.3v regular to power the attiny in the first place? All logic should be 3.3v in that case, no need for a level shifter

#

I think that's how it works, I might be wrong though

#

besides the processor speed difference between 8/16Mhz

formal onyx
#

the attiny is powered off a 3.7v lipo, im really only concerned about backdriving and blowing up the battery while programming the attiny

gaunt echo
#

can't you just use a schottky diode?

formal onyx
#

in hindsight yes I should've

gaunt echo
#

I see, you're not trying to redesign and order more PCB's?

formal onyx
#

yeah pretty much. Really extremely happy with how the prototype has turned out, but the board is so dense that any modification is going to require a looot of reworking and too dense to bodge something on so I think this iteration might end up not being wearable unfortunately :/

#

it really needs to either be programmable while the battery is installed, or have some way of setting time after being programmed. but I'm out of GPIO. If I had a spare GPIO I could add a hall effect sensor to the back and set time with a magnet.

#

I could in theory reclaim the reset pin, but then I'd need to be confident in my program first try because it'd be unprogrammable after that

gaunt echo
#

I'm pretty sure a logic-level voltage shifter will work fine at PWM frequencies, but I think the problem was whether your shift-register would be able to cope with PWM? Am I understanding this correctly?

formal onyx
#

Eh, for dimming the LEDs I can just swap the resistors for higher values, im not very worried about that

#

My primary concern is whether it's safe to program using level shifters with the battery connected, without a diode in place

#

apparently you can use the reset pin without disabling it, as ADC above trigger voltage of 2.2V. so if I could rig a hall effect to drop between 3.7 and 2.2V, I wouldn't need to reprogram the chip to set the time.

gaunt echo
#

My un-educated thinking now is that if you think about it, some Samsung quick charging tech uses up to 9V, and programming only takes a few seconds max

formal onyx
#

which is preferable anyway. voltage divider to generate ~2.5v to the reset pin and hall effect pulls up to 3.7?

gaunt echo
#

A few seconds of 5v shouldn't cause any damage, I don't think. I can't say for certain though, which I know is what you're looking for

formal onyx
#

Samsung knows what they're doing, I certainly dont 😆

gaunt echo
#

True! 😆

formal onyx
#

I appreciate it though

#

I've been working on this thing since 6pm so I think I need to sleep on this (and in general)

gaunt echo
#

You'll probably (hopefully/hopefully not) dream about the solution

formal onyx
#

yeah and then jolt awake at 3am unable to fall asleep until I finish it.

gaunt echo
#

yup hahaha, that's how the cookie crumbles 😄

#

why not just solder in a through-hole schottky diode on the battery

#

in-line

formal onyx
#

I thought of that but then couldn't I not charge it by any means?

#

board has a battery charging circuit on the back, intend to be able to recharge the battery through 5V contacts, but through an IC

gaunt echo
#

Oh yeah that’s a big brain fart by me 😆

formal onyx
#

i imagine I'd have to put the shottky diode between the battery terminal and the VCC of the attiny, but not between the 5V charger terminal and the battery or else it cant (purposefully) backdrive the battery to charge

#

yeah np

gaunt echo
formal onyx
gaunt echo
#

Ohh man. Good stuff either way!

formal onyx
#

Wait maybe there's hope

unknown.png
gaunt echo
#

Sleep on it. Something will come up, or someone with a better idea will chime in eventually

formal onyx
#

yeah definitely, luckily I don't have any on hand so I don't really have a choice but to sleep on it lol.

gaunt echo
#

Sorry if this the wrong channel for posting code (please correct me), but I am wondering if there is a more optimal method to send 3 floats over a radio packet:

typedef union
{
  struct {
    float vbat;
    float temp;
    float humid;
  } values;
  unsigned char bytes[12];
} RFMPACKET_t;

RFMPACKET_t _packet;

void loop() {
    _packet.values.vbat = getBatteryVoltage(); // returns float
    _packet.values.temp = t; // float
    _packet.values.humid = h; // float
    rf69.send((unsigned char *)_packet.bytes, sizeof(_packet.bytes));
}```
cedar mountain
#

You don't necessarily need to do the union with a byte array, since you can just directly cast a pointer to your struct itself if you want.

gaunt echo
#

Sorry I'm not very good with C

cedar mountain
#

You can just do (uint8_t *)&_packet.

gaunt echo
#

One last question, if I return; in the setup() method, what happens? Does setup run again? If not, how would I do that without recursion if possible

#

or with a loop

#

because I have this function

if (!rf69.init()) {
  while (1);
}``` and I think I want to ```c
// manual reset
digitalWrite(RFM69_RST, HIGH);
delay(10);
digitalWrite(RFM69_RST, LOW);
delay(10);```until ``rf69.init()`` returns true
#

Basically I don't want my program to block indefinitely, I want to keep retrying indefinitely until it succeeds

cedar mountain
#

You'd want to change the if to a while, like:c++ while (!rf69.init()) { ... reset stuff ... }

gaunt echo
cedar mountain
#

Watch out for the high-low on the reset pin, since often those will hold the chip in reset on a low and let it run on a high instead of vice-versa.

#

You'll want to check that against the radio docs.

gaunt echo
#

so I should read the pin status beforehand/during the "reset stuff" to check for that? I am just going by the adafruit RadioHead fork library examples

cedar mountain
#

No, you don't need to read the status, just be sure at the end of the while loop you leave the chip in the running state instead of leaving it in reset mode.

#

Your code could be correct as is, I just wanted to warn you that it might not be since many chips have an active-low reset pin.

gaunt echo
#

Ahh okay I understand now, good stuff

#

Thank you

livid osprey
severe latch
solar aspen
#

I'm trying to connect to an ATWINC1500 WiFi module with a Metro M4 Express using Arduino. Can't seem to get it to communicate with the module. I suspect I'm doing something wrong.

Has anyone tried this? Any suggestions?

I have verified that the WiFI module is working. I can talk to it with a different board.

livid osprey
solar aspen
#

Eventually, yes. 🙂 I pulled it apart to try it with an Arduino Due, Mega, etc.

#

Just curious if there's anyone that has done it.

livid osprey
severe latch
#

I also noticed many issues on GitHub regarding power consumption for the nRF52 on arduino libraries. Ha Thach mentioned back in 2018 that they will be working on the software to lower the power consumption and posting some documentations for low power mode

#

any idea whether this was ever released or worked on ? or is it still under the "TODO" list ?

#

I couldn't find an answer for this on the web

livid osprey
#

Again, not familiar with the nrf52 stuff. Glad you found the solution!

calm thicket
cedar mountain
formal onyx
pine bramble
#

I'm trying to build a USB device emulator. It's a proprietary USB IO device for a modern arcade machine. I've reversed what each button sends when pressed, I just need to figure out how to build a device around my findings. Any arduino libraries out there that can help me? Do I have to code the USB protocol from the bottom up? Is circuit python an option? Any input is appreciated!

cedar mountain
pine bramble
#

It is not sadly

#

Its very proprietary
I reversed what bytes are sent and when

#

I basically just need to make a device that sends the bytes I documented at the right times

#

Would modifying an HID library be reasonable? I'm not entirely sure how HID works

cedar mountain
#

I'm not sure. At the least such a library would probably provide an example of how to use the lower-level USB API.

calm thicket
elder hare
#

in C++ you name things like

void setVar();
void getVar();
void onButtonClicked();

question is do you also name function that does something like

void doUpdateList();

?

cedar mountain
#

Styles differ, but I'd probably go for updateList() instead, since update is already a verb.

elder hare
#

yea i see can see that 🙂

neon ginkgo
#

okay, using ESP32 and a seesaw rotary encoder. I'm using an if statement to read the button state to toggle a relay depending on the value set by turning the encoder. right now when I press the button every time the loop loops it switches the relay state causing it to oscillate at the speed of the loop. how can I trigger off each button press once?

sacred ivy
#

It sounds like you need some debouncing. Set up another loop within the button check loop that basically waits, then check to see if the button state changed. If it did, then go to the loop where you trigger your relay.

--or--
Have a "relay activated bit"

So

if Relay Activated = 0 then
if something do this (this is your main trigger loop)
Relay = 1
Relay Activated = 1
end main loop
else
Relay Activated=0

end Relay Activated loop
//note this assumes the relay is turned off elsewhere

This way, it ensures your loop fires once. Also invert bits depends on hardware config.

OR a third way, toggle the output. See here:
https://www.baldengineer.com/arduino-toggling-outputs.html

dusky cairn
#

hmmmm

#

seems like the latest arduino 2.0 can not detect my CP2014

#

Oh there it is, just need to restart the software

sacred ivy
past haven
#

Hi, does anyone know of a cheap and reliable circular (watch-like) display that works with arduino/adafruit feather? Im trying to make a compass if that helps at all

north stream
past haven
north stream
#

For a more bitmapped type of display, perhaps something like a pixxiLCD-13P2 could work. I'm not sure how "cheap" is "cheap", but they're about US$35 from Mouser

surreal pawn
#

I'm trying to save power on samd21 feather m0 basic by shutting down peripherals and sometimes get into a state where my code stops running and the LED_BUILTIN led starts fading on and off. What am I hitting?

#

I've mostly run into this with my code that tries to shut down USB or OSC8M

proven mauve
#

hey all, I'm making an arduino art piece. It uses random, and I'm having a hard time getting randomseed(analogread(0)) to work reliably, I end up with a lot of resets that produce the same seed, making the same display output. Anyone found a simple effective solution?

sacred ivy
proven mauve
#

aha, I found a solution I like for the randomseed(). Started reading just the lsb of the analogread() and filling an unsigned long a bit at a time with that, and then using that for the seed number. Seems to be working fine

north stream
past haven
sacred ivy
# past haven Thats exactly what im looking for :). Do you know if makerfabs is a reliable web...

TBH Im not sure. I had found a seller on Ali-express, so they cant be that much different. Their location lists them in China.

Otherwise there is amazon
https://www.amazon.com/1-28inch-Display-Resolution-Interface-Raspberry/dp/B08VGT2T42

$20 But maybe you can find one. I only searched for "round glcd arduino"

1.28inch Round LCD IPS Display Module 240×240 Resolution 65K RGB Co...

1.28inch Round LCD IPS Display Module 240×240 Resolution 65K RGB Colors GC9A01 Driver SPI Interface for Arduino/Raspberry Pi/Jetson Nano/STM32

past haven
#

Has decent reviews ig

sacred ivy
#

I swear adafruit had a round glcd at some point though

sacred ivy
past haven
past haven
neon ginkgo
#

Anyone know if its possible to "invert" or "highlight" text on an oled. I'm building a menu and would prefer using this to indicate the selected option instead of a little arrow

cedar mountain
neon ginkgo
north stream
#

That's one possibility, but it would eat up a lot of memory. Another possibility would be to swap the foreground and background colors when drawing the highlighted text.

neon ginkgo
neon ginkgo
#

Okay, posting this before going to bed I'll look at replies in the AM: using the Adafruit_SH110X library is there a way to invert/highlight text? @north stream suggested swapping the text and background colors but I cannot seem to find a way to do this in this library.

#

is this even possible in this library or is there a better library to do this, or can someone walk me through modifying the existing library?

wraith current
#

@neon ginkgo they way I do this for an SSD1306 with u8g2 library is draw a white box and then draw the text with black color (0)

m_u8g2->drawBox(0,0,127,31);
m_u8g2->setDrawColor(0);
queen stump
#

hey guys can I ask for a simple code help here?

livid osprey
queen stump
#

I found an ideal sketch for my "project"

#

this one on the link - but there's only one thing I can't figure out

#

the sketch uses sequential turning on and off of the leds

#

I would like to either have it just turn on instantly

#

or secondly, have it turn on sequentally and stay

livid osprey
livid osprey
queen stump
#

ok it's all good for now! thanks!

#

just one more q - the first array of leds is turned on now

#

but how would I delay turning on array 2 by x amount of time

pixels.setPixelColor(PXL2[i]

livid osprey
queen stump
#

ok then

#

can I use this instead - pixels.setPixelColor(0, pixels.Color(255, 0, 0));

#

i tried "addressing" multiple pixels and it wont compile

#

pixels.setPixelColor(0,1 pixels.Color(255, 0, 0)); for example

livid osprey
queen stump
#

will look into that, for quick test I'll do it manually

pixels.setPixelColor(0, pixels.Color(5, 0, 0));
pixels.setPixelColor(1, pixels.Color(5, 0, 0)); etc
crystal frigate
#

What’s the SDWN pin for? Can I hook this up to an Arduino?

IMG_1188.jpg
#

Or did I buy the exact wrong part, lmao

cedar mountain
#

That's a "shutdown" pin. You can drive it low to turn the amplifier off, or leave it alone for normal operation.

crystal frigate
#

whoops

#

So I'm guessing i mixed up "amp" and "preamp"

stable forge
pallid grail
#

The thermistor isn't in the CP example, but otherwise I think it's basically the same?

#

Supposed to write a template for this.

leaden walrus
#

@pallid grail yep. appears to be.

pallid grail
#

Ok keen, thanks.

#

@leaden walrus So um... it's not working. It says it compiled and loaded onto the board, but there's nothing in the serial monitor. I reset a few times, still nothing. Thought maybe because it was missing a battery, so I plugged one in to try that, still nothing. I have no clue how to begin troubleshooting this.

#

This was not what I expected to be the hurdle for this template. 😕

leaden walrus
#

what board are you using?

pallid grail
#

TFT Feather.

leaden walrus
#

baud rate matches in ser mon?

pallid grail
#

um... checking

#

yes

leaden walrus
#

try adding a delay

pallid grail
#

Where?

leaden walrus
# 
void setup() {
  Serial.begin(115200);
  while (!Serial);
  delay(10);
  Serial.println("\nAdafruit LC709203F demo");
#

the while (!Serial); line

pallid grail
#

There's already a delay(10); .. oh ok

#

Trying now

leaden walrus
#

more a "wait for serial monito to open"

#

than a delay

#

close serial monitor before uploading

pallid grail
#

Hey! There it is.

leaden walrus
#

then open after upload

pallid grail
#

Can't find it. Bleh.

#

uh... I'm fairly sure this board has one......

#

checking.

leaden walrus
#

different address maybe?

pallid grail
#

It's on the schematic. Connected to SCL/SDA.

#

Oof I don't mention it in Pinouts. That's a problem.

leaden walrus
#

run an i2c scan

pallid grail
#

Where's that again? Wait I think I saved it somewhere. Checking.

leaden walrus
pallid grail
#

I did

leaden walrus
#

but need to add i2c power enable

pallid grail
#

Oh bugger.

#

Right.

leaden walrus
#

maybe that's what's missing

pallid grail
#

That's the problem.

#

No devices found.

#

So I'm thinking yes.

#

The pin is never the same name either. Sigh.

#

How do I set it high?

#

I'm fuzzy on the basics I guess.

leaden walrus
# 
  // turn on the TFT / I2C power supply
  pinMode(TFT_I2C_POWER, OUTPUT);
  digitalWrite(TFT_I2C_POWER, HIGH);
  delay(10);
pallid grail
#

yah managed to dig it up.

leaden walrus
#

toss that in setup()

pallid grail
#

oki

leaden walrus
pallid grail
#

It is working now.

uncut kindle
#

That's not really the issue anymore though, as I still want to try to accomplish what I had been attempting before everything went wrong

#

I had been trying to use a BNO085 position sensor, and I was using an edited version of the example code on here to test it

#

As I mentioned before I tried to edit the baud rate of my chip so I could match their example and my IDE immediately crashed without giving me an error report, so I have no idea what went wrong

# 
#include "Adafruit_BNO08x_RVC.h"

Adafruit_BNO08x_RVC rvc = Adafruit_BNO08x_RVC();

void setup() {
  // Wait for serial monitor to open
  Serial.begin(115200);
  pinMode(5, INPUT); //Channel 3 input signal from RC
  delay(1000);
}

void loop() {
  BNO08x_RVC_Data heading;
  ch3 = pulseIn(5, HIGH, 25000); // collects data from the RC channels. chnl 3 outputs value either 1000 or 2000. It initially starts with 1000 meaning "off"
  if (ch3 < 1900) {
    kill_switch();
  } else {
    if (!rvc.read(&heading)) {
      return;
    }
  
    Serial.println();
    Serial.println(F("---------------------------------------"));
    Serial.println(F("Principal Axes:"));
    Serial.println(F("---------------------------------------"));
    Serial.print(F("Yaw: "));
    Serial.print(heading.yaw);
    Serial.print(F("\tPitch: "));
    Serial.print(heading.pitch);
    Serial.print(F("\tRoll: "));
    Serial.println(heading.roll);
    Serial.println(F("---------------------------------------"));
    Serial.println(F("Acceleration"));
    Serial.println(F("---------------------------------------"));
    Serial.print(F("X: "));
    Serial.print(heading.x_accel);
    Serial.print(F("\tY: "));
    Serial.print(heading.y_accel);
    Serial.print(F("\tZ: "));
    Serial.println(heading.z_accel);
    Serial.println(F("---------------------------------------"));
    delay(200);
  }
}
#

This is more similar to what I'd written I think, though this was about a week ago so I may be misremembering

#

Can anyone help me debug this?

cedar mountain
uncut kindle
#

The code did compile, mind you

#

Let me rewrite it a little better

#

So I uploaded the code to the chip, it ran successfully (at least I think), but once I actually hit the button on the RC to start running the example, the IDE crashed

crystal frigate
#

So I installed my new amp and it works fine but it’s not as loud as I’d like it to be. When I plug in the highest gain it only caps out. My speaker is 4W 3ohms

IMG_1203.jpg
#

Should I be looking for a speaker with a higher wattage or ohms? To make it louder

north stream
#

That's a pretty low impedance speaker, you might get better performance with 8 ohms. A more efficient speaker might help too (wattage and efficiency are different things). You can also look at your power supply and signal source, which can affect amplifier performance as well.

severe latch
#

I found the myFile.print which probably stores Data in ASCII and myFile.write () but this one only writes a single Byte

north stream
past haven
#

Hi everyone, Im hoping to make a Compass type device that basically has two devices point towards each other. I have two wifi feather Huzzahs with the GPS hat for them. I was wondering what I could use to continually send each devices GPS location to the other whenever they are connected to wifi?

#

Ive used blynk before with arduino, so I was wondering if I should use that for this, or something else?

#

the arrow will be showing up on a screen on the device

severe latch
#

Hi madbodger, thank you for your help.
Yes I saw this but for some reason the function is not popping up... not sure if it has something to do with the initializing of the object...
I am using almost the same example "SdFat_ReadWrite"

write_QSPI.png
north stream
cedar mountain
past haven
#

Since the devices will be very very far apart

#

And the only connection theyll have is Wifi

livid osprey
north stream
#

I was just addressing the scheduling, not the transport

past haven
north stream
#

For device to device, I don't think Blank is needed

livid osprey
#

If they're not on the same wifi network, you might need to establish a common point of access for the two devices. Whether that's a fixed server handling the handshaking, or some other 3rd party cloud service, is up to you.

past haven
crystal frigate
#

So I love my PN532 board but it’s far too big for my project. Can I somehow detach the antenna and layer it on the bottom?

IMG_1222.jpg
livid osprey
#

Not easily, no. The Adafruit PN532 is a great development board, but it's not ideal for a finished product of any kind. I would look for a separate PN532 breakout on Amazon or something if you need it to fit in a smaller space. (SparkFun and SeeedStudio are sold out, and the next closest thing on Adafruit is https://www.adafruit.com/product/5402)

#

Oh, @crystal frigate https://www.elechouse.com/elechouse/index.php?main_page=product_info&cPath=90_93&products_id=2276&zenid=j6nqrsdrq94jaq3ifp87gk9bm0 might be a good fit.

PN532 NFC RFID module V4 [WIRELESS-NFC-PN532_V4] - $29.90 : Elechou...

Elechouse PN532 NFC RFID module V4 [WIRELESS-NFC-PN532_V4] - Due to the rising price of NXP PN5321 IC, we have no choice but adjust the price of this board accordingly.To balance the price of this PN532 board, here comes a new version which is much cheaper: PN532 NFC RFID module -- Purple VersionOverview NFC is a popular technology in recent yea...

crystal frigate
#

Does this come with an external antenna or do I need to supply it myself?

livid osprey
crystal frigate
#

Oh, interesting. So in theory i wouldn't even need to port my code. It would use the same one right?

livid osprey
#

I did try to find an alternative with the same chip, yes.

#

The counterfeit PN532s should also work as drop-in replacements for half the price, but their actual performance might suffer in terms of range or reliability.

crystal frigate
#

gotcha. Yeah the RC522 is a cheap piece of garbage

livid osprey
#

Yeah, I was going to suggest at first, but didn't see stock on SeeedStudio haha

#

It would certainly allow for more flexibility in mounting onto a final product, thanks to its external antenna.

crystal frigate
#

yeah this is a local place.

livid osprey
#

If your code currently uses I2C communication, that should work without any modifications.

#

Doesn't offer an SPI interface, it seems, but otherwise should be equivalent.

crystal frigate
#

I’d have to check.

#

Otherwise the change shouldn’t be too much just to switch from SPI to I2C

quartz furnace
#

Hello have a ESP32 project that outputs composite video (just 8 bit color) I’m trying to change the color of a font that goes to the screen.. I have 0xFF as white , I can’t find a good Google result on a color table ..that uses shush a short hex code

cedar mountain
quartz furnace
#

Like 0,255,0

north stream
#

Basically, it's 3 bits of red, 3 bits of green, and 2 bits of blue. So for full green it would be 111 000 00. Rearranging that into 4-bit nybbles, it's 1110 0000, converting that into hex would be E0

cedar mountain
#

Or 0x1C if green is in the middle, or 0x07 if it's in the lower bits.

#

(Or possibly 0x38 for a 2-3-3 middle position.)

quartz furnace
#

So 0x07 made it a blue … 0x38 made it a light green? Had a tint of blue … I’d need to play around with small adjustments like 0x40? Thoughts on a darker green if it looks just slightly off ?

#

Hmm 0x40 must be invalid? Went to a color I can’t see well with a black background

#

0x36 made it a baby blue-ish

cedar mountain
#

I'd try single bits to figure out which is which... 01 02 04 08 10 20 40 80.

quartz furnace
#

Thanks .. I’m thinking it could be a lot of tests … tv could be slightly off in color adjustment, the output from an ESP32 is not “professional” and it is 8 bit so not a super long spectrum of colors (comparatively speaking)

north stream
#

I was kind of wondering when you said it was composite video, where color is determined by the phase and amplitude of the chroma subcarrier: not something an ESP32 can create directly.

crystal frigate
#

Hey all, I installed my GROVE NFC reader and it’s giving me an error that there is no pull up on my SDA or SCL pins.

#

Here’s my wiring, and here’s where I was supposed to cut my traces and enable I2C mode.

#

Can anyone see anything wrong?

cedar mountain
#

Well, I'm immediately suspicious that your SCL and SDA connections are the white and black wires. Isn't black GND on the Grove connector?

crystal frigate
#

Yes it is. But here’s the full photo, if you could make it out

#

i might have demolished actual grove port. But the pinouts on the thing dont work either

cedar mountain
#

The other thing that jumps out is that there are, in fact, no pullups on the I2C lines. Do you know whether either the Grove board or the MCU board has them built-in?

crystal frigate
#

I'm not sure. how do I tell?

#

Apologies, im more familiar with SPI

cedar mountain
#

I'd be checking the board schematics. Alternately, if you have a multimeter, you can measure the resistance between SCL and VCC with things powered off... if there are pullups somewhere, you'd expect to see about 2-10k resistance.

crystal frigate
#

luckily i do. what happens if they dont? do I need to add them myself?

cedar mountain
#

Yep. You'd just add one resistor each between SCL and VCC and between SDA and VCC. The value isn't critical, but something in the 2k-10k range is typical.

crystal frigate
#

so this fellow is using I2C and i see some resistors in there.

crystal frigate
#

So, added some resistors and now I’m getting a different error.

#

ValueError: No I2C device at address: 0x24

safe shell
#

The resistors appear to be in-line in the SDA and SCL lines? They need to pull those lines to VCC.

crystal frigate
#

Ooooh

#

so, is it basically bridging the VCC line to SDA and SCL lines with a resistor?

#

or am i incorporating a resistor before it gets to the arduino

safe shell
crystal frigate
#

Ooh, gotcha gotcha, okay.

#

Thanks! sorry, I'm awful at this and definatley never learned lmao

safe shell
#

it's not obvious or intuitive 🙂

crystal frigate
#

fair enough haha

#

Something like this perhaps?

IMG_1230.jpg
#

Before I solder it

safe shell
#

A little hard to tell what all is going on there, compare to the diagram in the link... VCC to VCC, GND to GND, SCL to SCL, SDA to SDA, (the four typical connections for I2C), plus a resistor from SCL to VCC (presumably 3.3V), and a separate resistor from SDA to VCC. I assume this is because the sensor breakout does not include pullups.

crystal frigate
desert barn
#

Using an Adafruit ItsyBitsy M0 Express with Arduino IDE. Anyone have luck recently with getting the onboard dot star to change color? Mine is stuck on pink and no matter what I try I can't get it to listen to the code I've uploaded. I think it comes down to a bootloader issue, but I haven't found any workarounds online.

solemn cliff
desert barn
#

Are you using pin 41 for data and 40 for clock?

solemn cliff
#

yes, DATAPIN 41, CLOCKPIN 40

desert barn
#

Yep that's exactly what i've tried on 2 brand new M0s and both just stay pink after uploading any sketch to them. The bootloader must be overwriting the dotstar library commands. Just out of curiosity how old is your board? I wonder if it's because my boards have a newer bootloader on them.

livid osprey
#

You've verified you're uploading to the correct device?

#

No other COM ports that might have received the program instead of the intended target board?

desert barn
#

Yes. Other code runs on it no problem. I'm controlling a 128x32 oled off of one right now.

livid osprey
#

Hmm, anything done by the bootloader SHOULD be overwritten by whatever you tell it to do after your main code starts running...

#

Have you tried the board in any other configurations, like loading a circuitpython uf2?

#

If you still suspect the bootloader is an issue, perhaps try updating it with the updater uf2 here: https://circuitpython.org/board/itsybitsy_m0_express/

CircuitPython - ItsyBitsy M0 Express Download

What’s smaller than a Feather but larger than a Trinket? It’s an Adafruit ItsyBitsy M0 Express! Small, powerful, with a rockin’ ATSAMD21 Cortex M0 processor running at 48 MHz - this microcontroller board is perfect when you want something very compact, but still with a bunch of pins.ItsyBitsy M0 ...

solemn cliff
#

I don't think the bootloader should impact your code. I was running UF2 Bootloader v3.13.0 SFHWRO and updated to latest, no issue with either. Here's test code that works for me:

📎 sketch_mar04a.ino
desert barn
#

Haven't tried circuitpython yet, i've never used it. I've used the Arduino IDE for years, but I'll look into it and see I can run an example just as a test. I did run the update .UF2 through the mass storage upload already and I get the same result it's red and green when in bootloader as expected and then solid pink after any sketch starts to run or is powered on out of bootloader mode. I even ran the sketch to clear the SPI flash in case something there was causing this issue.

pine bramble
#

You may be able to add in massive delays to your program - APA102 isn't very time-sensitive, but sending too fast may be an issue.

#

Iv'e bit-banged them without trying hard at all to be accurate in any way at all. ;)

desert barn
#

I am now infinitely confused. I just updated 2 boards to v3.14.0 SFHWRO and ran your sketch Neradoc and BOTH are still solid pink. COM ports are 100% correct and sketches are uploading because I just popped it back in my breadboard and changed back to my oled sketch and it's running.

pine bramble
#

try rainbow(400); instead of rainbow(10);

#

(line 23 in the loop)

desert barn
#

Nope. Solid pink. Can't even use strip.clear(); or strip.show(); with no rgb value to turn it off. No matter what it's pink.

solemn cliff
#

your libraries are up to date ?

pine bramble
#

well I think they are set to pink (magenta) in firmware. So that sounds correct (the dotstar is functional).

solemn cliff
#

unless there is a revision with different dotstar pins, or it's not the right itsybitsy model, I'm stumped

pine bramble
#

a noisy PSU should affect initialization to magenta once in a while ;)

solemn cliff
#

it does go pink at startup - and is not reset if the code doesn't use it

north stream
#

You could try bitbanging the signals, I suppose.

desert barn
#

Yep, only used neopixels until now so dotstar was installed last night. Everything else is up to date. I thought about different pins too and tried every single pin on it. No luck. Doesn't matter how it's powered for me either. Both boards over usb and battery are always pink.

pine bramble
#

My standard DotStar call-up sequence I run on anything that has a DotStar. Always works. ;)

livid osprey
#

Just making sure, the board says "M0 Express" and not "M4 Express"?

#

Because the M4 is the same shape, but the DotStar pins are different.

solemn cliff
#

and while we're at it, it's not a feather, right ? you mentioned battery 😉

pine bramble
# 
#include <Adafruit_DotStar.h>
#define NUMPIXELS   1
#define CLOCKPIN   40
#define DATAPIN    41
Adafruit_DotStar strip = Adafruit_DotStar(
  NUMPIXELS, DATAPIN, CLOCKPIN, DOTSTAR_BRG);
void setup_dotstar(void) {
  strip.begin(); // Initialize pins for output
  strip.show();  // Turn all LEDs off ASAP
}
void setup() {
    delay(900);
    setup_dotstar();
}
#

That should turn it off.

#

If that works, it's quite likely comms are correct (pins selected are correct, &c.)

desert barn
#

gus And that's enough programing for me today! Nis I just cut down the code you linked to and uploaded it and it worked. But... only in hexidecimal not with rgb values and I needed to switch the color order to BGR. I then uploaded my code which is functionally the same to the same board AND IT WORKS WITH RGB VALUES. Then I opened a new M0 (yes they aren't M4s) and uploaded my code without Nis's first and it worked first time with RGB values. WHAT IS HAPPENING?!?!

pine bramble
#

bingo

edgy wind
#

Hi I am switching a relay directly with arduino and I have a problem where the period of switching intermittently becomes much shorter

#

It works on breadboard but not stripboard

north stream
#

It could be electrical interference: relay coils are an inductive load, so when they are switched off, they produce a voltage spike.

#

@edgy wind Does your relay get its power from the same supply that's powering your logic? Does it have a protection diode?

willow compass
#

I have an Adafruit Ultimate GPS with an Arduino Mega (as well as many other pieces of hardware for a Rover), and I am having a strange issue with some functionality. We are using the GPS to find the current coordinates of the rover. I created this function from a modified version of the hardware parsing code. If I call this function from the main loop() it works as expected. However, I need to be able to call this function at a specific point in a different function to find the current position. So I need it working without the timer. However, If I remove the if statement for the timer (basically get rid of it). The function just doesn't work. In that it suddenly acts like it doesn't have a fix.

void gps(){
  char c = GPS.read();


  
  // if a sentence is received, we can check the checksum, parse it...
  if (GPS.newNMEAreceived()) {
    if (!GPS.parse(GPS.lastNMEA())) // this also sets the newNMEAreceived() flag to false
      return; // we can fail to parse a sentence in which case we should just wait for another
  }


  if (millis() - timer > 100) {
    timer = millis(); // reset the timer
    Serial.print("Fix: "); Serial.print((int)GPS.fix);
    Serial.print(" quality: "); Serial.println((int)GPS.fixquality);
    Serial.print(" flag: "); Serial.print(i);
    Serial.print("\n");

    if (GPS.fix) {
      Serial.print("Decimal Degrees: ");
      Serial.print(GPS.latitudeDegrees, 20); Serial.print(" "); Serial.print(GPS.lat);
      Serial.print(", ");
      Serial.print(GPS.longitudeDegrees, 20); Serial.print(" "); Serial.println(GPS.lon);
      Serial.print("*************************************\n\n\n");
    }
  }


  
}
#

My best idea so far is just set the timer insanely low time point, as I need the information on demand and the timer sometimes prevents that

cedar mountain
# willow compass I have an Adafruit Ultimate GPS with an Arduino Mega (as well as many other piec...

The timer shouldn't be necessary. However, the function will need to be called many times in a row before it gets a fix, since it's only receiving one character from the module at a time and needs to accumulate enough data to parse a whole message. So probably you should continue to call the parsing part from your loop, and have a separate function to get the last known position at the point in the code which needs it.

willow compass
#

something similar to


loop(){

move_foward(2000 cm);
turn_left(90 degrees);
move_foward(2000 cm);
...
}

move_foward(distance_want_travel){

while(!distance_want_travel)
 mtr_move_foward();
 //Need to get GPS data here
 //Does not need to be called every loop, but enough
}
cedar mountain
#

You'll unfortunately probably need to change the architecture for the movement commands so that they operate in smaller pieces, i.e. do something like set a target distance, and then each time through the loop(), check against that and move a small increment if needed. You don't want to have separate blocking while loops that interrupt the main program flow.

neon ginkgo
cedar mountain
neon ginkgo
#

Is that what the "creates undefined behavior" warning is trying to tell me?

cedar mountain
#

Heh. In general, when your code isn't working, and the compiler is giving you a warning about something, that's probably a good thing to investigate. Not all warning are legitimate, but if you don't know why it's flagging a line, it's often a symptom of a genuine issue.

neon ginkgo
#

@cedar mountain Well that cleared up a compiler warning. but still not working. the thing that baffles me is if I upload the code it works perfectly even after pressing the EN button that resets the board but as soon as I Unplug and replug the USB the OLED fails to display but all other functionality works.

cedar mountain
neon ginkgo
#

@cedar mountain ooh good thought

#

@cedar mountain I remember seeing somewhere, but it might have been a different oled library, a way to check for initialization. would display.avaliableForWrite() do that? throw it in the conditions of a while loop.

#

okay, with a 1000ms delay the oled failed to display until I opened the serial monitor.

pine bramble
#

There was an old ham radio cartoon (like a political cartoon) of the electric light bulb head guy, who'd torn the radio apart looking for the fault - only to discover he'd forgotten to plug the radio in.

#

When you build a radio from scratch, there are many (many) steps to take; and no guarantee when you turn it on for that first time, it'll do anything at all. ;)

#

But once you've built it and seen it working -- even for a moment -- never again is it the same for you. Because you saw it work, once, your own self.

#

The ability to just notice that moment - that it did, indeed, work, once -- if just for a moment - is important to progress that lasts. ;)

#

So, always stop to document the win - and take a victory lap after a big win. ;)

vivid rock
#

Does anyone know how to show flash on RP2040 board as a storage device in arduino IDE (using earl philhower core and Adafruit_TinyUSB)?
I tried using msc_external_flash.ino example (https://github.com/adafruit/Adafruit_TinyUSB_Arduino/blob/master/examples/MassStorage/msc_external_flash/msc_external_flash.ino) but it fails with a bunch of errors.
As far as I can see part of the problem is that both earlphilhower core and SdFat_AdafruitFork library contain SdFat.h and SdFatConfig.h, and it is the wrong one that gets included.

prime pawn
#

I have a Lora M0 board setup for aAduino and a M0 express board setup for circuitpython. I would like both of those boards to communicate back and forth via UART while allowing both of the boards to output debug info via USB.Do I have to change the way the Arduino board handles Serial in/out so I can still allow for USB debug data?

cedar mountain
prime pawn
#

@cedar mountain I will give that a try

crystal frigate
#

Hey all. Bit of a newbie question here. I’m attempting to hook up a couple of mech switches to the AW9532 expansion board but a lot of the documentation doesn’t show it being hooked up via STEMMA

IMG_1248.jpg IMG_1249.jpg
#

The black and white wires are hooked up to the two terminals on the switch. I’m just curious if the expander board offers the voltage I need or if I have to pull it externally.

#

I know I have to add a resistor… somewhere. For my button pull-ups

leaden walrus
#

the stemma is for connection back to the controller, it's for the I2C connection

crystal frigate
#

oh okay, so I have to pull my voltage from elsewhere?

leaden walrus
#

you're wondering about where the button's pull ups could potentially be connected?

crystal frigate
#

Yes

leaden walrus
#

you can use the VIN pin and/or rail

crystal frigate
#

Oh okay, great.

leaden walrus
#

or GND

#

for up/down

crystal frigate
#

thats it?

#

just GND > resistor > pin on switch and then into an input on the expander
?

leaden walrus
#

pretty much. the red wire from button is not used?

crystal frigate
#

no it's not

leaden walrus
#

and the button is a basic normally open type? on black/white wires?

crystal frigate
#

Yep

#

It's just a jade mechanical switch

leaden walrus
crystal frigate
#

Yeah I looked at that but im a bit confused because it's pulling voltage to the button

#

my switches only have 2 pins.

leaden walrus
crystal frigate
#

Yep

leaden walrus
#

red is like your 1, green is your 2

#

the two pins in each rectangle are connected internally in the square button

#

that example is pulling UP

crystal frigate
#

Right

#

So it would be something like this yeah?

#

A1 being the input pin on the expander

leaden walrus
#

yep

crystal frigate
#

I gotcha okay

leaden walrus
#

test one to be sure though, before committing to all switches 🙂

crystal frigate
#

Yeah you bet.

#

and can I daisy chain the voltage and ground or no?

#

(wire it in series is what i mean)

leaden walrus
#

yes. but each button needs its own resistor.

crystal frigate
#

Sounds good. Thanks for all your help! this is why I dont engineer lmao. I'm an artist

leaden walrus
crystal frigate
#

VIN

leaden walrus
#

the breadboard power rails are like that

crystal frigate
#

Oh sweet

#

Yeah I wired by stupid perf board incorrectly lmao

#

and I dont wanna take off the expander again

elder hare
#

what am i doing wrong here?

int PaletteNew[];

// from websocket.h
if ( inData.containsKey("paletteNew") )
{
  settings[selectedstrip].PaletteNew[] = { inData["paletteNew"] };
}

error

src\websocket.h:160:46: error: expected primary-expression before ']' token
north stream
prime pawn
#

One feather is using circuitpython and the second feather is using arduino. The feather running circuitpython is sending "Hello World!" to the other feather running arduino; however, the arduino feather isn't responding back with the data that it should be receiving. I validated that circuitpython is indeed sending "Hello World!" by using a FTDI Serial TTL-232 USB Cable.

I checked the pin connections and they should be hooked up correctly. CP RX --> AR TX ... AR TX --> CP RX

I'm not sure what I should be doing differently. Am I not connecting the feathers together correctly or is it a code issue?

String inputString = "";         // a String to hold incoming data
bool stringComplete = false;  // whether the string is complete

void setup() {
  // initialize serial:
  Serial1.begin(9600);

  Serial.begin(115200);
  while (!Serial) {
    delay(1);
  }

  // reserve 200 bytes for the inputString:
  inputString.reserve(200);
}

void loop() {
  // print the string when a newline arrives:
  if (stringComplete) {
    Serial.println(inputString);
    // clear the string:
    inputString = "";
    stringComplete = false;
  }
}

/*
  SerialEvent occurs whenever a new data comes in the hardware serial RX. This
  routine is run between each time loop() runs, so using delay inside loop can
  delay response. Multiple bytes of data may be available.
*/
void serialEvent1() {
  while (Serial1.available()) {
    // get the new byte:
    char inChar = (char)Serial1.read();
    // add it to the inputString:
    inputString += inChar;
    // if the incoming character is a newline, set a flag so the main loop can
    // do something about it:
    if (inChar == '\n') {
      stringComplete = true;
    }
  }
}
prime pawn
#

I changed my arduino code to a basic serial example and it works. I think there is an issue with my serialEvent1() not fireing

#

firing*

cedar mountain
prime pawn
#

@cedar mountain I'm using the feather m0 lora board

cedar mountain
prime pawn
#

That's ok. I can figure out another way to do this 🙂

neon ginkgo
#

@cedar mountain dude i found my issue! because I am using the oled feather wing with a doit esp32 board I did not have a signal to the reset on the oled. ran a wire between the EN pin on the doit esp32 to the rst pin on the wing and it works every time!!

cedar mountain
neon ginkgo
#

it does seem to make the esp32 loop a few times at boot every once and a while but that I assuming because the display didn't initialize or something

north stream
crystal frigate
# 
    if button1_pin.value:
        audio.play(functionSounds[1])
        print("Button 1 pressed")
    while audio.playing:
        pass
#

So I wired up my button to my GPIO expander and plunked in this code. No errors, but Im not getting anything back.

# 
button1_pin = aw.get_pin(1)  # Button on AW io 1
button1_pin.direction = digitalio.Direction.INPUT
#

here's how I'm initializing the input

#

And here’s my shoddy wiring job.

#

I have a weird feeling i'm pulling the resistor in the wrong place.

#

anyone have any ideas?

cedar mountain
crystal frigate
cedar mountain
#

So that will read 0 when then button is pressed, and 1 normally.

crystal frigate
#

I'm using a mechanical keyswitch wired to a plug, that has 2 inputs

cedar mountain
#

Your code seems to be written to assume the opposite.

crystal frigate
#

can i reverse it in the code?

#

Also, it doesnt even give me the print. which makes me think it's a soldering issue

cedar mountain
#

But as you say, if you're not getting anything right now, something else is wrong. It should have started to play immediately.

crystal frigate
#

Exactly. my speaker isnt yet hooked up but I should be getting some kind of feedback

#

in the form of the print

cedar mountain
#

If you have a multimeter, measuring the voltage at the pin while you push and release the button might eliminate some potential soldering problems.

crystal frigate
#

However

#

this is my current wiring, that appears to be different from the drawing i sent before.

#

heres where I think I might have the resistor in the wrong place.

cedar mountain
#

Yeah, that won't work... pin 1 will always read as high, regardless of the button.

crystal frigate
#

Clearly

#

so where did I go wrong?

cedar mountain
#

Ummm... you didn't follow the original diagram?

crystal frigate
#

No man it appears i have made a mistake haha

neon ginkgo
#

@crystal frigate your power needs to go through the switch. the switch is the same as touching two wires together.

crystal frigate
#

then where does the ground go

#

Sorry all. im very new to this and have only been using preassembled buttons from adafruit

neon ginkgo
#

the switch is not powered, it only interrupts the current path therefore it does not get a traditional ground.

crystal frigate
#

oh okay.

neon ginkgo
#

think of it as running a wire from V+ to your Digital In and then cutting it. the switch then "repairs" the cut wire when it is pressed.

crystal frigate
#

Okay that makes enough sense. I wish i knew this before

#

and then the resistor runs right before the switch, right? so the new "resisted" current goes into the GPIO

cedar mountain
#

Nathan, I think you might be confusing him. He was originally following a diagram which had a pullup resistor and the switch connected to ground. You're describing a different scenario with the switch to VCC and a pulldown resistor, I think.

crystal frigate
#

I've been following this to the best of my ability. though i cant seem to translate the button on the diagram to the switch im using.

cedar mountain
crystal frigate
#

Okay tell you what. Im gonna desolder the setup and try it again

#

I think my pin1 wire is in the wrong spot.

cedar mountain
#

Yes, changing the pin1 wire to connect on the other side of the resistor would be the minimal change.

crystal frigate
#

Gotcha.

#

it's been a cautionary tale. i shouldve REALLY tested this on a breadboard first.

neon ginkgo
#

also, what kind of iron are you using? does it have adjustable temperature?

crystal frigate
#

Yes.

#

You thinking it might be too hot?

#

That’s what a friend told me lol

neon ginkgo
#

are you "tinning" the tip of your iron before making a joint?

crystal frigate
#

Yep

#

And the wire.

neon ginkgo
#

I don't know about if you're too hot but it does look like you need to apply your heat better across the pad on the perf board and the pin.

crystal frigate
#

Okay. Maybe keeping the iron flatter on the board?

neon ginkgo
#

set your iron on the pad you're going to solder in then press it into the pin then add solder to the joint, you'll probably get better results.

crystal frigate
#

Will keep that in mind. Thanks!

neon ginkgo
#

UEYTRE4IRTER34 TIJGHHY

#

YYHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

cedar mountain
neon ginkgo
#

@cedar mountain ah that'd be 4yr old daughter typing

crystal frigate
#

Classic 😂

pine bramble
#

I have a stupid question, I have an rgb strip, with 4 pinouts: 12v, R, G and B
the 12v, no problem I need to connect it to a 12v supply

But the pins named as R, G and B to what and why? Any pin is alright, do I need to use pwm, or what?

livid osprey
#

No such thing as stupid questions in a help channel. 👍

#

As for connections, a transistor circuit is probably needed if you plan to use pwm control on an arduino, as the gpio pins are not capable of driving 12v to turn the lights off. If you just want on/off functionality, though, a switch or relay that connects rgb to ground should be enough to get the lights to turn on, as these strips usually already have current resistors included.

pine bramble
# livid osprey 12v is your common positive input, and the other three pins are the negative ter...

So if I didn't want to control the brightness/colour, I can connect the rgb pins to the ground or to any pin?

Also can I connect the rgb pins to a single cable and then to a single pin? I only need them to be white so...

My board under the IIC (8 table) has a 12v pin, can't I use it to power up the led strip?
https://www.google.com/search?q=trigorilla+2560+pinout&client=ms-android-xiaomi-rvo3&prmd=ivsn&sxsrf=APq-WBsi80ZAXdelRGxfhT16qZrc8ODEDQ:1646574913170&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiHpq7G0bH2AhWxSfEDHcd0C3AQ_AUoAXoECAIQAQ&biw=393&bih=768&dpr=2.75#imgrc=Wc1_u5k61O5qoM

livid osprey
# pine bramble So if I didn't want to control the brightness/colour, I can connect the rgb pins...

You can’t connect it to any pin, it has to be one capable of 12v or open circuit. You can certainly draw 12v from the 12v pin, but you should find a 12v-safe gpio to handle the other side. I know a lot of 3d printers like to borrow a spare fan/heater connection for this, as this is usually the pwm-capable higher voltage output. Whether or not your board outputs for specifically 12v fans/heaters is something you should look into before going ahead with this.

gilded gazelle
#

basically is there a good place to learn what needs to be done in converting ANY sketch for non-ada device to ada ones

#

I always feel like I am starting over each time with no carryover

ionic bridge
#

I'm looking at the Arduino Nano 33 BLE. It says it's based on the NINA-B306 which claims to have NFC support and "internal PCB antenna", but I can't figure out if it includes an internal NFC antenna or if I'd need to add an external one for it to work. Does anyone know this? The documentation isn't clear :p

north stream
ionic bridge
#

does that imply "it's not possible to use NFC without an external antenna" or "you can also connect an external one if you feel like it, but there's a built-in one too"

north stream
#

I'd guess the former: you'd need an antenna to use NFC. There isn't really room on that board for a built-in NFC antenna.

ionic bridge
#

Fair enough

#

do you know of any arduino boards with a built-in one, or with a connection port?

#

(or really just any boards at all, not necessarily just arduino)

north stream
#

Do you mean something like an add-on board or shield, or a CPU board that has onboard NFC support, or what? Usually I use add-on boards for things like that.

ionic bridge
#

Ideally something onboard. I'm attempting to put together a project that doesn't require obscure parts or complex soldering

#

But a relatively easily available addon board would be fine. I specifically need it to function as an NFC tag rather than reader/writer so PN532-based stuff won't work for me

north stream
ionic bridge
#

what is stemma?

north stream
#

It's a standardized connector system for I2C peripherals, designed so you can easily plug things in without soldering.

#

There's a nice description of STEMMA here: https://www.adafruit.com/category/1005

STEMMA Products Category on Adafruit Industries

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

livid osprey
# gilded gazelle can I get a pointer to translating Xiao sketches to QTPy ones? I am playing with...

If the peripherals are analogous, it's usually just a matter of updating your pin definitions in code and board definition in Arduino IDE settings. If the chip is the same (eg. Xiao RP2040 to QtPy RP2040) you should have a pretty easy time. For switching core chipsets, you may have to manually debug some incompatibilities. I don't see any good references anywhere, but it shouldn't be too much more than changing your settings and some numbers most of the time.

gilded gazelle
#

I have been trying to get any sketch to run, none involving SED do anything

#

seeduino exp board

#

using qtpy2040

ionic bridge
gilded gazelle
#

hello world(u8g2) does not display anything , I uncommented the line used on their site

north stream
# ionic bridge oh, that's good to know! Would the boards have a connector for the other end?

If you click on the "controllers" tab on that page, it will link to this category of all the controllers with that connector available: https://www.adafruit.com/category/621

STEMMA, STEMMA QT (JST SH 1mm), Controllers Products Category on Ad...

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

livid osprey
#

So there are some pinout differences between the two boards, so some modification may be necessary. Could you provide a link to the example you're trying to use?

adafruit_products_qtpy-rp2040-pins.png xinpin.png
gilded gazelle
#

ok lemme make it

#

I get confused trying to match up the different naming schemes

livid osprey
#

What errors do you get in compilation?

gilded gazelle
#

on the pinout

#

none

#

no errors

#

occasionally I will see "done" in serial monitor

livid osprey
#

Try replacing U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);
with U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ GP25, /* data=*/ GP24, /* reset=*/ U8X8_PIN_NONE);

gilded gazelle
#

compiling

#

GP25 not declared

#

GP24 not declared

#

how about SCL1 and SDA1

livid osprey
#

Try just 25 and 24

gilded gazelle
#

ok

livid osprey
#

Oh yeah you can try scl1 and sda1

#

Looks like the board definition does have them

gilded gazelle
#

24 and 25 ...no errors or output

#

trying 1 and 1

#

*1

#

SDA1 & SCL1 not defined

#

I am glad that the "simple swap" is not simple , I feel better 😉

#

my cats need tending, I will be back

livid osprey
#

Just to double check, you have header pins soldered to the qtpy and the pins are all properly seated?

scarlet talon
#

Hello! Has anyone used the FastLED library with the arduino uno & the LPD8806 chipset ? I have everything almost working , expect the LED strip isn’t lighting with the expected colors. Any tips would be appreciated, thank you!

north stream
scarlet talon
#

As far as I am aware yeah, Im defining the strip as LPD8806 then passing in with addLeds() similarly to the documentation via github, with the code I'll paste in a moment , though it doesnt seem to cooperate with the coloring yet only

#

here is the strip being turned on and off with the button , though the color is just regular, expect maybe the first 2 lights are pink , would you or anyone else have any idea of what that may be ? Thank you for the help as well !

north stream
#

When you say you wire the relay to the strip, what do you mean?

vivid rock
north stream
crystal frigate
#

So, I’m still not getting any input read from my button pin on my GPIO expander.

#

All the polarities check out.

crystal frigate
#

Lmao didnt have my resistor soldered in all good

eternal river
#

any one know a usb-midi library that works with rp2040?

scarlet talon
vivid rock
heavy onyx
#

so I got a pro trinket 5v and I put some code onto it, then realized some code was wrong, fixed it, and reuploaded it, will the original code mess with it, if so how would I fix that?

native dagger
#

I don't know arduino super well, but I believe the original code was obliterated by your changes + reupload

heavy onyx
#

oh ok, awesome

uncut aurora
#

Where did y’all learn how to code. I can’t find any good online classes or anything. I can’t learn on my own by just looking at other peoples code.

native dagger
#

I had some classes in college to get me started but they were assembly and python. Other than that I just learned by picking a project that seemed within my grasp and getting help from places like this.

#

Arduino is C++ so not the exact same, but you might be assisted by The C Programming Language

rough vessel
# uncut aurora Where did y’all learn how to code. I can’t find any good online classes or anyth...

It's been a lifelong process. I started on the family's TI-99/4A using the BASIC manual it came with to make simple games. I moved on to learn C/C++ a few years later from hand-me-down textbooks, and eventually Python and lots of other languages using online resources as something piqued my interest or was demanded by the needs of the project motivating me.
I'm lucky that I'm pretty good at following tutorials and picking up concepts as I go, but not everyone can do that.
If you're just getting started and there's something specific you want to accomplish, I'd recommend finding some tutorials or guides on similar projects and work your way up to your goal(s). There's always the path of taking formal classes, if that works better for you. There are plenty around these days, but you'll need to be more specific probably to get some good recommendations on what you're looking for.

#

Don't be afraid to start small and get a good foundation on the basics; it will serve you well no matter which direction you end up going.

rough vessel
uncut aurora
elder hare
#

hmmm using FastLED i got a jsonarray with ints (palette data) that i want to set to my CRGBPalette256 PaletteCurrent;
socket.h

        if ( inData.containsKey("paletteNew") )
        {
          int arraySize =  inData["paletteNew"].size();
          settings[selectedstrip].PaletteNew[arraySize];
          
          for (int i = 0; i < arraySize; i++)
          {
            settings[selectedstrip].PaletteNew[i] = { inData["paletteNew"][i] };
          }
        }

main.cpp in loop

void Settings::ChangePalette()
{
    PaletteCurrent = PaletteNew;
}

settings.h

class Settings
{
public:
    uint8_t        StripNumLed;
    uint8_t        PatternBrightness;
    E_Patterns     PatternActive;
    E_Direction    PatternDirection;
    uint8_t        PatternDelay;
    E_Tail         PatternTail;
    uint8_t        PatternFadeAmount;
    E_WrapAround   PatternWrapAround;
    uint8_t        PatternBarLength;
    E_ColorUse     PatternColorUse;
    E_Animation    PatternAnimation;
    float          PatternPosition;
    unsigned long  PatternUpdate;

    CRGBPalette256 PaletteCurrent;  // <--------------------
    uint8_t        PaletteNew[];    // <--------------------

    Settings()
    {
        PatternBrightness = 64;
        PatternActive     = THEATHERCHASE;
        PatternDirection  = FORWARD;
        PatternDelay      = 70;
        PatternTail       = DUST;
        PatternFadeAmount = 128;
        PatternWrapAround = YES;
        PatternBarLength  = 4;
        PatternColorUse   = RANDOM;
        PatternAnimation  = PIXEL;
        PatternPosition   = 0.0f;
    }
    void ChangePalette();
};

but my leds are just flickering in white :S so my question is: what am i doing wrong here?

cedar mountain
#

It looks like you're not actually creating the new palette in memory anywhere. I'd expect to see that being malloc()ed once you know the size in the JSON parser. I'm also not sure you're using the palette correctly, since you have it defined as a uint8_t array of variable size, but it probably is a RGB array with 256 elements?

elder hare
cedar mountain
#

But really you ought to be using the actual class, if you're going to be using it for your palette.

elder hare
#

but can i copy the jsonarray directly to CRGBPalette256 PaletteCurrent; ?

cedar mountain
#

I don't see why not.

elder hare
# cedar mountain I don't see why not. 
src\websocket.h:165:52: error: ambiguous overload for 'operator=' (operand types are 'CRGBPalette256' and '<brace-enclosed initializer list>')
             settings[selectedstrip].PaletteCurrent = inData["paletteNew"][i];
cedar mountain
#

You'd want to assign to PaletteCurrent[i] to set a particular color, I believe.

elder hare
# 
        if ( inData.containsKey("paletteNew") )
        {
          int arraySize =  inData["paletteNew"].size();          
          for (int i = 0; i < arraySize; i++)
          {
            settings[selectedstrip].PaletteCurrent[i] = inData["paletteNew"][i];
          }
        }
cedar mountain
#

It looks like it's pulling a string out of the JSON structure instead of giving you an integer? I'm not familiar with how the JSON accessors work, but ideally you'd want to convert that to a CRGB color value first.

elder hare
#

hmm im still unsure how this would work

cedar mountain
#

The main thing to establish is what type is inData["paletteNew"][i] giving you? You might want to try assigning that to a temporary integer variable, printing it, etc. I don't know what your JSON looks like.

elder hare
# cedar mountain The main thing to establish is what type is `inData["paletteNew"][i]` giving you...

hmmm 2 problems
From Client side (Qt)

Palette Sent :  QJsonArray([0,255,0,0,32,171,85,0,64,171,171,0,96,0,255,0,128,0,171,85,160,0,0,255,192,85,0,171,224,171,0,85,255,255,0,0])

From Server side (ESP32)

02550032171850641711710960255

Comparing

// Q 0,255,0,0,32,171,85,0,64,171,171,0,96,0,255,0,128,0,171,85,160,0,0,255,192,85,0,171,224,171,0,85,255,255,0,0
// E 0,255,0,0,32,171,85,0,64,171,171,0,96,0,255
  1. problem im missing half of the palette as you can see under Comparing
  2. why is the ESP32 only 1 long "string" of numbers and no , comma between? :S
cedar mountain
#

How are you printing things on ESP32?

elder hare
# 
        if ( inData.containsKey("paletteNew") )
        {
          int arraySize =  inData["paletteNew"].size();
          settings[selectedstrip].PaletteNew[arraySize];
          
          for (int i = 0; i < arraySize; i++)
          {
            settings[selectedstrip].PaletteNew[i] = { inData["paletteNew"][i] };
          }

          for (int i = 0; i < arraySize; i++)
          {
            Serial.print(settings[selectedstrip].PaletteNew[i]);
          }
        }
cedar mountain
#

So the print() function will just print the number, with no commas.

#

And you're still dealing with uninitialized memory, so no telling what that's doing.

elder hare
#

so im not allowed to do

uint8_t        PaletteNew[];

and then

        if ( inData.containsKey("paletteNew") )
        {
          int arraySize =  inData["paletteNew"].size();
          settings[selectedstrip].PaletteNew[arraySize];
        }
cedar mountain
#

Nope. The linesettings[selectedstrip].PaletteNew[arraySize];is accessing the arraySize element of the uninitialized array, not creating it. You'd need to use new or malloc() to actually create the array. Although as previously mentioned, even that would be wrong because it's a uint8_t array instead of a palette object.

elder hare
#

i am realy confused now :S

how it would work normaly is

DEFINE_GRADIENT_PALETTE( Sunset_Real_gp )
{
    0, 120,  0,  0,
   22, 179, 22,  0,
   51, 255,104,  0,
   85, 167, 22, 18,
  135, 100,  0, 103,
  198,  16,  0, 130,
  255,   0,  0, 160
};

this is just an array of bytes
then i would simply do

PaletteCurrent = Sunset_Real_gp;

and it works

cedar mountain
#

What magic is that DEFINE macro doing?

elder hare
#

i have no clue 😛

cedar mountain
#

Heh heh. Yeah, it looks like it's treating the number as a hue and converting it to a full RGB color under the hood. If you want yours to behave that same way you'll need to duplicate that logic. Probably the library has some sort of HueToRGB utility function you can use.

elder hare
#

but does not :S

cedar mountain
hallow seal
prime pawn
north stream
#

Further, you can probably just call rf95.send(receivedChars, ndx); but you'll need to hoist ndx out of your recvWithEndMarker() routine so it persists (which you'll have to do anyway, otherwise, ndx will be 0 for every received character)

prime pawn
north stream
#

Maybe, but you can probably just skip that and send the receivedChars buffer directly

prime pawn
#

Alright, I'm not exactly sure where to start

north stream
#

I'm not either, as I'm a little unclear on what the code is attempting to do. It looks like it's getting data from Serial1 and sending it via RF95 or sending the same buffer if there's no new data, or what?

prime pawn
#

I should of explained all that. Sorry.. there is data getting sent from one feather m0 running circuitpython to Serial1 on feather m0 lora running arduino. The serial data gets stored. I'm trying to send that stored data via RF95 once it's received.

#

data should be 100% received when a '\r' is detected

#

Also, python code that sends the data over: 'uart.write(bytes(hum_val, 'utf-8'))

north stream
#

Ah, I think several things will need to be tweaked to get that to work. Right now, it attempts to send even if newdata is false and it'll break if it gets a partial message.

prime pawn
#

I was thinking the same. I'm thinking I should probably move the send code into the if statement inside of the showNewData routine.

north stream
#

Good idea, that would address one problem.

#

The other one is more subtle and trickier: suppose recvWithEndMarker() gets called when it has only received the first few bytes. It'll copy those bytes into the receivedChars array, but then Serial1.available() will become false, and it will exit the while loop and the function. Those characters will effectively be lost unless it happens to get called when the \r has already been received.

#

What you'll need to do is preserve ndx between calls, so it can keep appending characters to the buffer until it gets the \r, terminates the string[1] and sets newData to True.

#

[1] You may not need to terminate the string, since ndx tells you how many characters are in the buffer, and you can use that as the count of bytes to send via RF95

#

Also note that the receiving routine should check for overflow, in case it gets more characters that can fit in the buffer

#

The good news is that your code looks good and nearly finished. The annoying news is the last bit is gonna be a little complicated.

#

I'm in a similar spot with some code I'm working on, and I'm not sure what to do

prime pawn
#

Well, you gave me good info to start with to help refactor my code. I will give this a whirl and see where it takes me. LOL. I'm still stuck on the char * issue

north stream
#

That one, at least, is fairly simple: char foo[] is an array of characters, char * bar[] is an array of pointers to characters

#

However, I don't think there's any need to copy the array before sending it, and I'm not sure the syntax you have there will copy it anyway.

prime pawn
#

That makes sense. I should probably move the reveivedChars into the send and not copy it

prime pawn
#

Ok, one more thing. What isn't making sense to me is after refactoring to rf95.send(receivedChars, ndx); I am receiving error:

   87 |         rf95.send(receivedChars, ndx);
      |                   ^~~~~~~~~~~~~
      |                   |
      |                   char*```

I'm not sure why I'm receiving that error when I have ```char receivedChars[numChars];``` at line 7.
north stream
#

Presumably the .send() routine expects a pointer to uint8_t instead of a pointer to char. That's easy enough to fix by casting it (they're both 8-bit quantities, so it's a reasonable thing to do):

# 
    rf95.send((uint8_t *) receivedChars, ndx);
#

Alternatively, you could declare your receivedChars array as uint8_t instead of char.

prime pawn
#

I'm probably going to choose the cast route. I have a feeling if I declare the receiveChars array as an uint8_t instead of char I'm going to run into more errors 😆

#

Code compiled, but to be honest, I don't 100% understand what I wrote. I definitely have some homework to do 🙂

north stream
#

That's how we all learn

#

I'm trying to debug this code that's supposed to figure out that this set of points describes a circle/polygon of a particular radius around a particular center

screenshot_1306.png
prime pawn
#

That is totally over my head. Good luck!

north stream
#

It may be over mine too, so I too have some homework to do!

crystal frigate
#

so I have an adafruit SPI sd card. (512 mb) hooked up to my arduino, and it used to recognize it before, and now it's not. Have i formatted something wrong?

#

My code is fine. No errors.

#

I haven’t looked at my wiring ,but if it was bad, it wouldn’t detect the sd card would it?

crystal frigate
#

i gave it

with open("/sd/test.txt", "w") as f:
    f.write("Hello world!\r\n")

no errors, but no test.txt on the board.

north stream
#

You may need to close the file to write it @crystal frigate

pine bramble
#

what's the go-to solution for restoring ItsyBitsy 32u4 5V 16 Mhz - application runs but flash won't accept a new upload; cannot erase flash using avrdude - but can dump flash contents using it.

#

(prefer home brew solution but open to requiring a 'proper' tool - hardware dongle)
J-Link EDU on-hand but something said it won't do 32u4.

pine bramble
#

Hi all, I am trying to use the QT PY RP2040 with arduino IDE, but unfortunately I have an error when loading the sketch, the port disappears. Could you tell me how to correct this error?

crystal frigate
#

it's a feather RP2040

livid osprey
crystal frigate
#

How would I do that? It’s an SPI connection

sick tiger
#

I have a really basic problem: i cant find the connected port.
im using archlinux and an esp8266 nodemcu-v3
theres no /dev/ttyUSB*x* or /dev/ACM*x*
dmesg output is

[13148.556015] usb 1-4: new full-speed USB device number 11 using xhci_hcd
[13148.847637] usb 1-4: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64
[13148.847642] usb 1-4: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[13148.847644] usb 1-4: Product: USB Serial

nothing that hints for me which port it is using
(arduino IDE is recommending /dev/ttyS0 which does exists but when i read it, nothing appears)

north stream
buoyant hatch
sick tiger
north stream
#

Ah, that's progress. Does anything show up in /dev/bus/usb?

buoyant hatch
sick tiger
#

001 003 004 005

#

is 005 the file?

buoyant hatch
#

Yes. What are the permissions on it?

sick tiger
#

642(crw, rw, r) if i remember correctly, so it would need to adjust it to 666 for use

#

well pyserial dislikes the port, even with full access permission

Exception has occurred: SerialException
Could not configure port: (25, 'Inappropriate ioctl for device')```
buoyant hatch
#

642 is rw, read-only, write-only. That's a bit strange...

sick tiger
#

its crw, rw, r

#

then i had the value false

buoyant hatch
sick tiger
#

It also work a week ago

#

ah i see with the ch34x package i have ttyUSB0 again

buoyant hatch
#

The c stands for the file type (character special), like d for directory.

sick tiger
#

ah i see, sweet it works again.
thanks for the help y'all

pine bramble
#

@buoyant hatch 'or another Arduino' and the program used is pretty much what I'm wondering about.

specific to 32u4 target to receive the .hex-encapsulated image (which the Arduino IDE already has ("caterina" or similar).

Even more so: is the 32u4 specifically a candidate for this type of homebrew ISP, as its target MCU (the one getting new firmware to restore a bootloader, erase flash &c.)

sick tiger
buoyant hatch
#

Any Arduino compatible board which takes the ArduinoISP sketch should work as a programmer.
I say should because I've only ever used an Uno for that though...

north stream
buoyant hatch
sick tiger
#

not regular text files i could look into so heres the name, could be one of them

unknown.png
buoyant hatch
#

They should all be regular text files. Try cating one of them.

sick tiger
#

/usr/lib/udev/rules.d is holding most of the udev rules
but problem is solved so.

pine bramble
#

@buoyant hatch Thanks. The reason I ask: avrfreaks.net is rather insistent (from several years ago) in multiple posts that 32u4 is more 'proprietary' and requires a special tool called AVR Dragon or .. Atmel ICE and will not work with a homebrew job.

#

(avrdude supports AVR Dragon explicitly)

#

I've been unable to erase the ItsyBitsy 32u4 5V 16 MHz board using avrdude but the same command line works fine, on CircuitPlayground Classic 32u4.

#

This really is a 'does anyone (reading this) have hands-on experience' question, I think.

north stream
#

If it works on one 32U4 and not the other 32U4, that implies it's not a 32U4 problem specifically, but something hinging on a difference between a 32U4 Itsy and a 32U4 CPC

buoyant hatch
pine bramble
# north stream If it works on one 32U4 and not the other 32U4, that implies it's not a 32U4 pro...

The ItsyBitsy 32u4 ran fine for many dev cycles.
I *think* I uploaded it Uno firmware (in platformio).
Hasn't worked since, to erase the flash.
Can dump firmware using avrdude, on the trouble board, no problem.
Last code uploaded (which may be for the Uno!) run fine on cold reset; happens to be an interactive Forth interpreter.
Successfully echo's the commands sent to it in SerialMonitor, including interim (verbose) print statements.

#

The application area has a strange report to give (when a dump flash 0x0 0x1000 is requested) but the Forth code (regular Arduino IDE based code) runs anyway.

#

strange here:

# 
avrdude> dump flash 0x0 0x1000
>>> dump flash 0x0 0x1000 
0000  11 64 11 64 11 64 11 64  11 64 11 64 11 64 11 64  |.d.d.d.d.d.d.d.d|
0010  11 64 11 64 11 64 11 64  11 64 11 64 11 64 11 64  |.d.d.d.d.d.d.d.d|
0020  11 64 11 64 11 64 11 64  11 64 11 64 11 64 11 64  |.d.d.d.d.d.d.d.d|

(truncated by termbin!)
tail end is here:

#

'erase' in interactive avrdude normally fills to 0xff 0xff 0xff.. in the application space.

#

On this one board (one instance, not 'any' itsy32u4 but my one and only) .. it has no effect at all.

#

Whereas it behaves as expected on my (also one and only) Circuit Playground Classic (32u4) board.

#

(when CircuitPlayground Classic gets erased, the bootloader LED pulses endlessly, instead of timing out after eight seconds or so).

pine bramble
#

following a tutorial here:

safe halo
#

Any reason why I cant use a saved variable to start a wIfI connection

  sys_Settings.network.WiFi_STA_SSID = "Castle"
  sys_Settings.network.WiFi_STA_Password = "password"
  Serial_2.println("Connecting to WiFi: ");
  Serial_2.println(sys_Settings.network.WiFi_STA_SSID);
  Serial_2.println(sys_Settings.network.WiFi_STA_Password);
  //Works
  WiFi.begin("Castle", "password");
  //doesnt Work
  WiFi.begin(sys_Settings.network.WiFi_STA_SSID, sys_Settings.network.WiFi_STA_Password);

when I load from the variable it comes back with a bunch of Yen Symbols

unknown.png
#

Prior to starting the WIFI with the variable I can print screen them and they are correct but afterwards they are all yen symbols

pallid grail
#

@leaden walrus I can't figure out how to make the STEMMA QT port work on the ESP32 Feather V2. I know there's a power pin, I tried pulling it high, also tried doing the INPUT polarity OUTPUT thing that the ESP32S2 Feather does, that didn't work either. I'm trying to run the i2c_scan_test. I pulled the #if defined(ADAFRUIT_FEATHER_ESP32_V2) out of another file that Limor updated for this recently, so that should at least be right...

leaden walrus
#

hmm...not sure. lemme check. i think i got one.

pallid grail
#

Also, the I2C scan is.... running really weird. I mean, it compiles and loads, but there's no power to the STEMMA QT port. But the scan is supposed to run every 3 seconds, and it's not doing that..... more like every 10 or something longer than that sometimes.

#

Limor assumed it would Just Work ™️ but that is not the case without adding something to handle the power pin at least.

leaden walrus
#

what board are you selecting?

pallid grail
#

Limor said to select..... ESP32-PICO D4

#

Is that why the define isn't working?

leaden walrus
#

not sure. but looks like the v2 variant has been merged, but not released.

pallid grail
#

We're waiting on a release or something from Espressif, so it'll be a while apparently, before there is a "ESP32 V2" to pick.

leaden walrus
pallid grail
#

I'd say I could add the latest URL to the board manager options, but this is what Limor said to do for now.

#

But that's what's making it not work?

#

That we're not choosing the "right" board?

#

I can bring this up with Limor, but I wanted to make sure it wasn't a me-problem first.

leaden walrus
#

the URL would be the same. they (espressif) just needs to make a new release. latest release if from before V2 board def was merged in.

pallid grail
#

Oh. I thought there was a "stable" and "latest" URL available.

#

Limor said not to wait on Espressif. Implying they take a while to release.

#

I guess I'll ask her how this is suppose to work then.

#

She's stepped in a lot on this guide to keep me from being blocked on things, so I figure I shouldn't spend too much time trying to figure it out myself.

leaden walrus
#

@pallid grail this works:

// --------------------------------------
// i2c_scanner
//
// Modified from https://playground.arduino.cc/Main/I2cScanner/
// --------------------------------------

#include <Wire.h>

// Set I2C bus to use: Wire, Wire1, etc.
#define WIRE Wire

void setup() {
  // turn on power
  pinMode(2, OUTPUT);
  digitalWrite(2, HIGH);

  // set pins (SDA, SCL)
  WIRE.setPins(22, 20); 

  // make rocket go
  WIRE.begin();

  Serial.begin(9600);
  while (!Serial)
     delay(10);
  Serial.println("\nI2C Scanner");
}


void loop() {
  byte error, address;
  int nDevices;

  Serial.println("Scanning...");

  nDevices = 0;
  for(address = 1; address < 127; address++ ) 
  {
    // The i2c_scanner uses the return value of
    // the Write.endTransmisstion to see if
    // a device did acknowledge to the address.
    WIRE.beginTransmission(address);
    error = WIRE.endTransmission();

    if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
      if (address<16) 
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");

      nDevices++;
    }
    else if (error==4) 
    {
      Serial.print("Unknown error at address 0x");
      if (address<16) 
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices found\n");
  else
    Serial.println("done\n");

  delay(5000);           // wait 5 seconds for next scan
}
#

but not sure that's anything you'd want to put in a guide

#

since it's using specific pin numbers, and not #defs

pallid grail
#

hmm

#

Yeah it would be confusing, I think, in the guide.

#

Limor is on it.

leaden walrus
#

once the release is made, and the V2 board option shows up in the Arduino IDE, the sketch could then use NEOPIXEL_I2C_POWER

pallid grail
#

right.

leaden walrus
#

and probably won't need the setPins() call

pallid grail
#

I just said pretty much exactly that to Limor, heh.

#

Anyway, she's going to figure something out.

#

Thanks for the help, but you're off the hook now. 🙂

leaden walrus
#

sure. np. this is going to unfortunately be confusing probably.

#

can get things to work right now. but not really in the way one would in the long run.

severe latch
#

Hi. Is there any documentation available to find the exact stack and heap size for the nRF52840 ?
I went through several documentations for the nRF52840 on learn.adafruit.com but was only able to figure out that the total SRAM is 256 KB.
There is an SRAM layout presented for the nRF52832 but couldn't find one for the nRF52840

safe shell
severe latch
#

only the SRAM layout ** for nRF52832 is provided there I believe

stable forge
#

looks like heap and stack are each 8192. That could certainly be increased.

severe latch
#

hmm okay. Interesting to note , thank you !

severe latch
#

Is there a way that I can verify that ? I am trying to allocate a static array >8 KB (to verify stack size) and see if an error will pop up but seems like the compiler is not showing errors anyways.

#

Just running this simple sketch

#include<Arduino.h>
#include <Adafruit_TinyUSB.h>

void setup() 
{
  //allocate static array with 10 K size
  uint8_t buff [10240];
  memset(buff,0,sizeof(buff));
}

void loop()
{

}
violet shell
#

Hi all, I am having some difficulty in running code for the Mikroe LSM6DSL with the feather M0 and not sure what to do

#

this is the following error I get when trying to run the example code through the Ardiuno IDE

leaden walrus
#

looks like the example is expecting a different board

#

are you connected to the SCL/SDA pins on the Feather M0?

# 
LSM6DSLSensor AccGyr(&Wire, LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW);
#

try that

#

and comment out the other stuff

violet shell
leaden walrus
#

ok. try the above.

#

just need to change code to accommodate using on a different board than what example was originally written for

violet shell
#

i have changed the code to as above bu i still get the erro but for #define INT1 PB11

#

the code i am using is from the example library for the board so shouldn't it work straight away, if I'm not mistaken

leaden walrus
#

comment out the other stuff

#

the #defs and dev_i2c setup

#

"board" = the feather m0, not the LSM6DSL

#

if you're following a guide that says that code will work on a Feather M0, please link to guide

violet shell
violet shell
leaden walrus
#

yep

#

and also the line the creates dev_i2c

#

er. wait. no. just looks commented out.

#

where did you get that library?

violet shell
#

it is one that i downloaded within the IDE app

leaden walrus
#

arduino ide library manager?

violet shell
#

yes the LSM6DSL v2.0.0

leaden walrus
violet shell
#

I've connected the LSM6DSL board like so

leaden walrus
#

does that look like the library you installed?

violet shell
violet shell
leaden walrus
violet shell
#

currently trying the tilt one

leaden walrus
#

example is specific to STMicrolectronics STM32 IOT Discovery Kit

#

which is why you need to deal with different pin definitions

#

for the feather

violet shell
#

so how would I need to change it so that it works with the Feather

leaden walrus
# 
//#define SerialPort Serial
//#define I2C2_SCL    PB10
//#define I2C2_SDA    PB11
//#define INT1        PD11

// Components.
//TwoWire dev_i2c(I2C2_SDA, I2C2_SCL);
LSM6DSLSensor AccGyr(&Wire, LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW);
#

try that

#

// is how you comment out lines

#

and for the feather, can just use the Wire reference directly (first parameter)

violet shell
violet shell
leaden walrus
#

oh. you used block comment.

#

that'll work too

#

but you need to comment out the dev_i2c line also

# 
TwoWire dev_i2c(I2C2_SDA, I2C2_SCL);
#

that line

#

and change

LSM6DSLSensor AccGyr(&dev_i2c, LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW);

to

LSM6DSLSensor AccGyr(&Wire, LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW);
violet shell
#

ok so i have done this but comes back with unterminated comment

leaden walrus
#

delete that line, with /*

violet shell
#

ok that runs the code further down to a point where now the SerialPort is not declared in the scope

leaden walrus
#

ugh...yah. there's more that needs changing....other refs to dev_i2c...

#

and INT1 is needed

#

how did you end up using the STM library? just by searching in Library Manager?

violet shell
#

int 1 is defined further up but has been commented out

leaden walrus
#

you'll need to wire the int pin to use that example

#

it's using one of the feature detections of the LSM and using the INT pin to report it back to the main board (feather in your case)

violet shell
#

ahh ok so where would i connect that pin to onto the featherboard?

leaden walrus
#

which feather m0 do you have?

#

nvm. it's in the photo 🙂

#

All pins can be interrupt inputs

#

so you have plenty of options

#

looks like you're using 5 for something?

violet shell
leaden walrus
#

so 6, or any of 9, 10, 11, 12

#

leaving out 13 since it has an LED attached

# 
#define SerialPort Serial
#define I2C2_SCL    SCL
#define I2C2_SDA    SDA
#define INT1        6
#

and then go ahead and use that #def block, but change it to that

#

change INT1 to whatever GPIO pin you end up using

#

and uncomment this as well

TwoWire dev_i2c(I2C2_SDA, I2C2_SCL);
violet shell
leaden walrus
#

basically put sketch back to original code