#help-with-arduino | adafruit | Page 54

tawdry merlin Apr 10, 2020, 5:01 PM

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ok removed that line

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Updated code

📎 message.txt

deft scroll Apr 10, 2020, 5:03 PM

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@safe shell My friend you are the MAN...or WOMAN...err THANK YOU IT WORKS turns out it's the anything else pins on the bottom and I deleted it so I had no idea it was there!! THANK you so much!

safe shell Apr 10, 2020, 5:04 PM

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@deft scroll Cool! Glad you got it working!

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@tawdry merlin Give me a second, I'm going to install your board in Arduino so I can actually compile and not just look at it 😉

tawdry merlin Apr 10, 2020, 5:06 PM

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ok

safe shell Apr 10, 2020, 5:06 PM

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While I'm doing that, I'd suggest tracing through the code and making sure the sequences make sense to you.

tawdry merlin Apr 10, 2020, 5:06 PM

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i can give u the save file for the project

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https://robojax.com/learn/arduino/?vid=robojax_ESP32_Heltck_OLED

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this is where i got my library from

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my teacher gave me this linkl

safe shell Apr 10, 2020, 5:09 PM

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Thanks, it's downloading now.

tawdry merlin Apr 10, 2020, 5:10 PM

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ty so muhc once again, im soo gratfulf or this, wish i can give u something for ur help so far

safe shell Apr 10, 2020, 5:11 PM

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That's what we're all here for. Since this is an assignment, I'm trying to guide you to find your own solutions rather than be too specific 😉

tawdry merlin Apr 10, 2020, 5:15 PM

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😄

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let me know if u want the project file

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any progress?

safe shell Apr 10, 2020, 5:28 PM

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@tawdry merlin sorry, got pulled into a local support issue. I wasn't able to get the heltec board definition recognized, so I'll stick with manual process rather than wrestle with that longer.

tawdry merlin Apr 10, 2020, 5:28 PM

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should i give u remote access for the thing?

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or just screenshare

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and text me the changes

safe shell Apr 10, 2020, 5:30 PM

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No, let's just try to logic through it.

tawdry merlin Apr 10, 2020, 5:30 PM

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ok

safe shell Apr 10, 2020, 5:31 PM

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You removed the extra brace in line 27? I commented out all of the heltec lines and it compiles without that

tawdry merlin Apr 10, 2020, 5:32 PM

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📎 Capture.PNG

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which brace?

safe shell Apr 10, 2020, 5:32 PM

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line 29... I think that's extra

tawdry merlin Apr 10, 2020, 5:33 PM

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ok removed it

safe shell Apr 10, 2020, 5:33 PM

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isn't the code following that supposed to be in setup() also?

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So it should compile now (even if the order is not yet as you want it)?

tawdry merlin Apr 10, 2020, 5:33 PM

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it is in the setup

safe shell Apr 10, 2020, 5:33 PM

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yeah, that brace was throwing things off. should be better now.

tawdry merlin Apr 10, 2020, 5:33 PM

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omg its actualyl uploading

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lets see ig ity works

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waiting for it to finjiish

safe shell Apr 10, 2020, 5:34 PM

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🤞

tawdry merlin Apr 10, 2020, 5:34 PM

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the scene is not on, and the serial monitor is freaking out now XD

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Rebooting...
ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac

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that is being spammed on serial monitor

safe shell Apr 10, 2020, 5:36 PM

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the ESP32 isn't happy, but it's just a code thing, we'll look for it

tawdry merlin Apr 10, 2020, 5:36 PM

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ok

safe shell Apr 10, 2020, 5:36 PM

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so it reboots over and over?

tawdry merlin Apr 10, 2020, 5:36 PM

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yeah

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i just keeps refreshing

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and that text comes back

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the one i sent

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and the screen also isnt booting as well

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but its progress

safe shell Apr 10, 2020, 5:38 PM

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Is there still a Heltec.display->clear(); somewhere near line 20? that should be later. You can't do anything Heltec until after the Heltec.begin...

tawdry merlin Apr 10, 2020, 5:38 PM

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void setup(){
Serial.begin(115200);

pinMode(LED,OUTPUT);
digitalWrite(LED,HIGH);

delay(300);
Heltec.display->clear();
WIFISetUp();

WiFi.disconnect(false);//重新初始化WIFI
delay(1000);
WiFi.mode(WIFI_STA);
WiFi.setAutoConnect(true);

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yeah i see it

safe shell Apr 10, 2020, 5:40 PM

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BUT... notice that Heltec.begin(... is in WIFIScan(), which is called by WifiLoop(), which is never called. So that Heltec initialization stuff really needs to be up in setup()

tawdry merlin Apr 10, 2020, 5:40 PM

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Heltec.display -> display();
Heltec.begin(true /DisplayEnable Enable/, false /LoRa Enable/, true /Serial Enable/);
delay(800);
Heltec.display -> clear();

safe shell Apr 10, 2020, 5:40 PM

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and in the right order

tawdry merlin Apr 10, 2020, 5:40 PM

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so i put that in the setup?

safe shell Apr 10, 2020, 5:42 PM

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see the examples... Heltec.begin should be the first thing. it initializes that object so you can work with it

tawdry merlin Apr 10, 2020, 5:43 PM

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so on top of voice setup i put heltec.begin

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void*

safe shell Apr 10, 2020, 5:44 PM

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sorry, I wasn't clear... all of the setup code must be inside the setup() function, but you need to do the Heltec.begin(... before any other Heltec... actions

tawdry merlin Apr 10, 2020, 5:44 PM

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WAIT THE LED IS ON

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ITY WORKS

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the screen shows the wifi setup

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and on serial monitor the time

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but it says connnection failed

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i think it didnt connect to the wifi right

safe shell Apr 10, 2020, 5:46 PM

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Can you cut and paste a relevant section from the serial output? again with three backticks before and after

tawdry merlin Apr 10, 2020, 5:47 PM

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ok

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holdon

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wait now it stopped working

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load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac
Serial initial done
y

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on my screen it says Connecting...failed

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Wifi setup done

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and OLED initial done

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wait

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nvm

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re uploading code worked

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Friday, April 10 2020 18:50:00
Day of week: Friday
Month: April
Day of Month: 10
Year: 2020
Hour: 18
Hour (12 hour format): 06
Minute: 50
Second: 00
Time variables
18
Friday

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but the screen has same error

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📎 image0.jpg

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📎 image0.jpg

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this is bascially what i see so far

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the time works

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not the wifi

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usually the wifi refreshes

safe shell Apr 10, 2020, 5:54 PM

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what do you mean by "usually the wifi refreshes"?

tawdry merlin Apr 10, 2020, 5:54 PM

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when it fails to connect

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it goes back to "connecting"

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untill it connects

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it was what the sample code did

safe shell Apr 10, 2020, 5:54 PM

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Looks like it should try 10 times

tawdry merlin Apr 10, 2020, 5:54 PM

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yeah

safe shell Apr 10, 2020, 5:57 PM

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can you point me to the example this is from?

tawdry merlin Apr 10, 2020, 5:57 PM

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ok

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let me find it

safe shell Apr 10, 2020, 5:58 PM

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you could try to increase the count from 10 to something else, 10 only gives 5 seconds, could take longer. Has it ever connected?

tawdry merlin Apr 10, 2020, 5:58 PM

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yeah it connected in the past

safe shell Apr 10, 2020, 5:58 PM

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(obvi double-check your ssid and password too)

tawdry merlin Apr 10, 2020, 5:58 PM

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📎 message.txt

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this is an example code

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this one works

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wait

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now the example code doesnt work on my ESP32

safe shell Apr 10, 2020, 6:00 PM

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OK, so why don't we each try to compare the two and find out the difference, why one works and the other doesn't. You could save your current and reload the example just to verify it's all still fine

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ah

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with your ssid & pw?

tawdry merlin Apr 10, 2020, 6:00 PM

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OHH

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i forgot to put that

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no still same issue

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the selected serial port failed to excecute script esptool

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does not exist or ur board is not connected

safe shell Apr 10, 2020, 6:02 PM

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oh, that's different... may need to check for firm cable connection, even try reset the board

tawdry merlin Apr 10, 2020, 6:03 PM

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it works just fine on the project we are working on but the example code is giving that error

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i reset it and such

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switched cables just now

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ok i told my teacher my concern

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and it was the opposite

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he wants the time on the screen

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and the wifi works aslong as the time shows up

safe shell Apr 10, 2020, 6:08 PM

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OK, probably best to focus on your code then. I need to take a break for lunch. But I'd suggest for now:

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reviewing your code, make sure things are in the sequences you want
look at the redundant wifi setup code in setup() and WiFiSetup() - you only want to do that once, the WiFiSetup looks more robust and has your OLED display code in it
try to increase the loop count, add some Serial.print statements so you can trace the code execution in more detail
don't forget about the string format stuff in the time code, there should be plenty of web resources to find docs on what your teacher wrote

tawdry merlin Apr 10, 2020, 6:08 PM

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if the time doesnt show up on the screen then the wifi is not working

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ok

tawdry merlin Apr 10, 2020, 6:43 PM

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i scrapped all that code in the end

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i took an example code and I just need to make it go on the screen instead of serial monitor

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#include "time.h"

const char* ssid     = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

const char* ntpServer = "pool.ntp.org";
const long  gmtOffset_sec = 0;
const int   daylightOffset_sec = 3600;

void setup(){
  Serial.begin(115200);

  // Connect to Wi-Fi
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected.");
  
  // Init and get the time
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  printLocalTime();

  //disconnect WiFi as it's no longer needed
  WiFi.disconnect(true);
  WiFi.mode(WIFI_OFF);
}

void loop(){
  delay(1000);
  printLocalTime();
}

void printLocalTime(){
  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }
  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
  Serial.print("Day of week: ");
  Serial.println(&timeinfo, "%A");
  Serial.print("Month: ");
  Serial.println(&timeinfo, "%B");
  Serial.print("Day of Month: ");
  Serial.println(&timeinfo, "%d");
  Serial.print("Year: ");
  Serial.println(&timeinfo, "%Y");
  Serial.print("Hour: ");
  Serial.println(&timeinfo, "%H");
  Serial.print("Hour (12 hour format): ");
  Serial.println(&timeinfo, "%I");
  Serial.print("Minute: ");
  Serial.println(&timeinfo, "%M");
  Serial.print("Second: ");
  Serial.println(&timeinfo, "%S");

  Serial.println("Time variables");
  char timeHour[3];
  strftime(timeHour,3, "%H", &timeinfo);
  Serial.println(timeHour);
  char timeWeekDay[10];
  strftime(timeWeekDay,10, "%A", &timeinfo);
  Serial.println(timeWeekDay);
  Serial.println();
}```

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anyone know how to put this on the built in screen?

safe shell Apr 10, 2020, 7:13 PM

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@tawdry merlin Is it connecting now?

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You should be able to pull over the blocks from your old code... Heltec.begin(... and those few lines into setup() and the rest where they make sense in loop()

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or into a similar function as the old one that you call from loop()

long geyser Apr 10, 2020, 7:20 PM

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I have a noob question.

I'm very new to Arduino and microcontrollers, and am working on the larger project that involves uploading code to an ESP8266. I have the ESP8266 (v2.6.3) board installed, have the NodeMCU 0.9 board selected, and have the correct COM port selected.

I'm trying to compile someone's script that includes a few different libraries/dependencies (AH_EasyDriver.h, ArduinoOTA.h, PubSubClient.h, and SimpleTimer.h). When I compile the script, the debugger kicks back a bunch of errors. Most referring to undefined references. From what I know about technology, my current guess is that it's not reading my dependency files correctly. My dependencies are in the same folder as my script, and it looks like one of them is importing properly:

I've pasted my error in pastebin, and can copy it here if preferred.
https://pastebin.com/1EzkTm4R

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📎 unknown.png

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wait, i think I got it

tawdry merlin Apr 10, 2020, 8:10 PM

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@safe shell sorry i had my lunch break too

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i think i need to scrap that code and the code i sent just now, i simply gotta get it on the screen and noty the serial monitor

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https://discordapp.com/channels/327254708534116352/537365760008257569/698242576154755073

long geyser Apr 10, 2020, 8:20 PM

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I made it a bit further, but I'm getting this now:

sketch\ArduinoOTA.cpp: In member function 'void ArduinoOTAClass::_onRx()':

sketch\ArduinoOTA.cpp:189:34: error: 'U_FS' was not declared in this scope

 if (cmd != U_FLASH && cmd != U_FS)

                              ^

exit status 1
Error compiling for board NodeMCU 0.9 (ESP-12 Module).

Any thoughts?

safe shell Apr 10, 2020, 8:28 PM

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@tawdry merlin Sure, just start from whatever example you think is closest. Like I said before, I think you have all of the pieces you need, they just need to be put together to do what you want. Even if your main goal is display on the OLED, Serial.print(... is a very useful tool for debugging and tracing through your code when it's running.

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BTW, I was able to load and run the previous example on a different board. No Heltec OLED display, but I can help check the flow if you get stuck.

warm token Apr 10, 2020, 9:36 PM

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I bought one of these IR extenders - anyone know if there's any kind of standards around them, like what voltage/current they take?
https://www.amazon.ca/gp/product/B01H5A3IWY

north stream Apr 10, 2020, 10:20 PM

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You could run it from a medium voltage supply and measure the current through it and the voltage drop to determine if it's a plain IR LED, or one with a current limiting resistor.

vagrant current Apr 11, 2020, 1:39 AM

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So I have a tp4056 (https://www.google.com/search?q=How+to+make+a+18650+battery+charge+indicator+with+a+tp4056&rlz=1C1CHBF_enUS819US819&sxsrf=ALeKk02u_D6e5Hg7MWi8iFOGhVRcH3Vymg:1586569060524&tbm=isch&source=iu&ictx=1&fir=mniUAoZY-SRwBM%253A%252CA_YNoMQddZm-0M%252C_&vet=1&usg=AI4_-kQwwa2sn6qubkC3ExORCvDZEr6lyQ&sa=X&ved=2ahUKEwiSj46qnt_oAhUTrJ4KHVctBgUQ9QEwG3oECAYQFg#imgrc=mniUAoZY-SRwBM:) chip to charge 18650 batteries and I was wondering how I can also use this chip to tell how much battery is left in them

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What I am looking for is the 4 led systems that you see on portable chargers for phones and such

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And how can I use that chip to charge two batteries

cedar mountain Apr 11, 2020, 2:15 AM

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For battery-fullness, the chip doesn't really help much, but if you just need a rough estimate, you can use a few analog comparators to check the charging voltage and light up LEDs in response.

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For two cells, you can hook them up in parallel and charge them together IF they have about the same charge level to start with. If you're not sure about that or want to be safer, put some low-value resistors between them to allow the charge levels to equalize.

proven mauve Apr 11, 2020, 4:21 AM

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Anyone familiar with using MIDI.h for USB? I have a physical serial midi jack and a USB cable. I can send and receive on the serial jack, I can receive on the USB and send it to the serial, but I can't reliably send out over USB

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setting USB or midi baud rates for Serial.begin didn't seem to help

tawdry merlin Apr 11, 2020, 3:30 PM

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@safe shell sorry if I stopped answering, when my teacher told me I did it all wrong I kinda got a little upset and he told me to talk a break for the day. So sorry if I stopped answering. He knows I’m spending wayy to much time on this than I should

safe shell Apr 11, 2020, 3:32 PM

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@tawdry merlin No problem, we're here if you have a question later.

tawdry merlin Apr 11, 2020, 3:36 PM

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Ok

jade lichen Apr 11, 2020, 5:04 PM

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Does anyone have any experience with the MLX90614 IR thermal sensor? I have it wired up but the temperature its reporting seems extremely distance dependent

cedar mountain Apr 11, 2020, 5:07 PM

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What part variant do you have? They have versions with various lenses and fields of view, so maybe you're picking up more of a scene average at larger distances.

jade lichen Apr 11, 2020, 5:09 PM

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looks like i have the MLX90614ESF-BAA

cedar mountain Apr 11, 2020, 5:10 PM

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Yeah, that's 90 degrees FOV, so it'll pick up a pretty wide area and give you an average value.

jade lichen Apr 11, 2020, 5:12 PM

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Ahh. I thought it was the dual zone variant and it's "object" field reporting was a much narrower focus

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Do you know which variant uses a narrower focus?

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or, can I create a narrower focus by putting a tube around the sensor?

cedar mountain Apr 11, 2020, 5:20 PM

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Unfortunately you'll pick up the temperature of the tube, then.

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The narrowest is the xCI variant at 5 degrees. Have a look at the datasheet for all the available versions.

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(The dual-zone is left/right, not narrow/wide.)

patent vessel Apr 11, 2020, 5:28 PM

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is there a simple way to start a counter after a button press in arduino?
reason: I have a 433mhz reciever with the RCSwitch library.. no problem capturing the remote data so i can make the arduino reciever respond to it.. but when i hold button the remote keeps pulsing commands.. i basically want to use a timer to persist an action without turning off as long as the command is being pulsed

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//Declarations
#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();

int ledPin = 7; // pin where the relay will go

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  mySwitch.enableReceive(0);  // Receiver on interrupt 0 => that is pin #2
}

void loop() {

  if (mySwitch.available()) {

    // when we recieve our code we start something
    if ( mySwitch.getReceivedValue() == 1366 ) {
      digitalWrite(ledPin, HIGH);
    }

    // we clear everything again
    mySwitch.resetAvailable();
    digitalWrite(ledPin, LOW);
  }
}

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code is fine but it lacks the persisting of keeping the LED on until a certain time has passed of recieving no more repeated commands

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i thought using milis is the way but you cannot reset that

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like i assume its starting a timer on first recieve.. then resetting the timer every time it recieves a new pulse.. whjen timer is over a certain value it switches led off

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maybe i can borrow code from "blink without delay and create a timer" where i subtract milis on button press to get a relative like timer..

jade lichen Apr 11, 2020, 5:46 PM

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One other question about the MLX90614 that I have - if I'm filling the FOV with the object whose temperature I'd like to read, it should report the correct temperature, yeah? but compared to an off the shelf thermometer, it's reporting much higher

patent vessel Apr 11, 2020, 5:58 PM

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figured it out

cedar mountain Apr 11, 2020, 6:01 PM

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By "much higher" do you mean like 3 degrees, or 100 degrees?

patent vessel Apr 11, 2020, 6:03 PM

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YES i got it

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// code to toggle a relay on the nice remote.. hold on the pulses until you let go


//Declarations
#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();

int ledPin = 7; // pin where the relay will go
unsigned long time; // our counter



void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  mySwitch.enableReceive(0);  // Receiver on interrupt 0 => that is pin #2
}

void loop() {
  if ((millis()  - time) > 1000) { //if counter time exceeds 1 second

    digitalWrite(ledPin, LOW); // turn LED off

  }

  if (mySwitch.available()) {

    if ( mySwitch.getReceivedValue() == 1366 ) {   // when we recieve our code we start something
      digitalWrite(ledPin, HIGH);
      time =  millis();
    }

    mySwitch.resetAvailable(); // ready to recieve more commands

  }
}
``` probably ugly code but it works

jade lichen Apr 11, 2020, 6:08 PM

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my case, I'm reading my hand, which is reporting at 85 degrees F at a distance of 2 inches - which should be filling the FOV. Seems reasonable. But if I close the distance to a half inch, the reported temperature rises as much as 10 degrees, to 95/96

cedar mountain Apr 11, 2020, 6:09 PM

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Hmmm, I don't have a good explanation for that.

ivory fulcrum Apr 11, 2020, 7:30 PM

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I am looking for some fun arduino projets to do. Anyone got some ideas?

jade lichen Apr 11, 2020, 7:40 PM

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An alarm clock that drops spiders in you

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*on

pine bramble Apr 11, 2020, 8:08 PM

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If I would like to use the adarfuit musik maker shield for arduino without putting it on the arduino what wires would I need to connect for it to work?

odd fjord Apr 11, 2020, 8:11 PM

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@pine bramble take a look at theis page of the guide https://learn.adafruit.com/adafruit-music-maker-shield-vs1053-mp3-wav-wave-ogg-vorbis-player/pinouts

north stream Apr 11, 2020, 8:35 PM

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It's basically an SPI peripheral with a few more control signals

potent basin Apr 12, 2020, 1:19 AM

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Hi, I have a Adafruit trinket and I'm trying to use it to simulate a few button presses after a delay. So, delay, button press, delay, button press, delay button press. Here is my code:


void setup() {
pinMode(buttonPin, OUTPUT);
pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(buttonPin, HIGH); // INITIAL BUTTON STATE
  delay(3000);
  pushTvButton();
  delay(3000);
  pushTvButton();
  delay(3000);
  pushTvButton();
  exit(0);
  
}

  void pushTvButton(){
  digitalWrite(buttonPin, LOW); // TV BUTTON PRESS
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  digitalWrite(buttonPin, HIGH); //RELEASE BUTTON PUSH
  digitalWrite(LED_BUILTIN, LOW);
  }```

Is this the best way to do simulate a button press?
Is it also possible to turn the 5v output on and off?

north stream Apr 12, 2020, 1:20 AM

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Depends on what your TV button is wired to. Sometimes instead of writing a "high" level to the pin, you just switch the pin to input to let it float (so it goes between not connected and grounded, essentially, which is how many buttons are wired).

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The 5V output can't be switched directly, but you might be able to use an I/O pin as a switchable output if you only need a small amount of current (like a few milli-amperes). There are also ways to switch more current using transistors or other components.

potent basin Apr 12, 2020, 1:24 AM

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I have put a multi meter across the contact switch on the TV with the continuity setting enabled and I get around 700 ohms (I think its ohms) and then when I press the contact switch, the multi meter beeps and the resistance goes to 0. If I solder the trinkets ground and pin 2 pins to either side of the contact switch, it doesn't seem to work properly and also the trinket usb boot loader doesn't appear to work. If I desolder the connections everything goes back to normal.

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Ok, I'll forget the 5v for now. I have a small 5v relay that I thought I might be able to use.

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FYI, the TV is a decased CRT that when it is turned on, it stays in standby. I want to simulate the contact switch button press automatically. Reason being is that the CRT is in an Arcade machine and when the power is switched on, everything should turn on together.

north stream Apr 12, 2020, 1:59 AM

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There are several things that could be happening there. It'll take a little engineering to figure out what's going on, and the best approach.

clear fog Apr 12, 2020, 2:38 AM

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hello

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I'm new to Arduino, working on what should a simple program, not sure what I'm missing, I have a momentary switch activating a program but it only runs once. I want it to repeat until the button is pressed again, like a toggle.

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const int buttonPin = 2;
const int ledPin = 5;

// variables will change:
int buttonState = 0;

void setup() {
pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT);
}

void loop() {
buttonState = digitalRead(buttonPin);

if (buttonState == HIGH) {
program1();

} else {

}

void program1(){
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
}

north stream Apr 12, 2020, 2:52 AM

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Perhaps have something like ```c
if (digitalRead(buttonPin)) {
buttonState = !buttonState;
delay(5);
}

clear fog Apr 12, 2020, 2:55 AM

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@north stream Thanks, will that allow program1 to loop until next button press?

north stream Apr 12, 2020, 2:59 AM

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If I read it right.

#

Give it a try.

clear fog Apr 12, 2020, 2:59 AM

#

trying it, how do i post code on here in the box like that?

north stream Apr 12, 2020, 3:01 AM

#

Use three backticks around it like ```code```

clear fog Apr 12, 2020, 3:02 AM

#

''' code '''

#

code

#


const int buttonPin = 2;    
const int ledPin =  5;    

// variables will change:
int buttonState = 0;        

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() {
  buttonState = digitalRead(buttonPin);

  if (digitalRead(buttonPin)) {
  buttonState = !buttonState;
  delay(5);
   program1();
   
   
  } else {
   
    
  }
  
}

void program1(){
   digitalWrite(ledPin, HIGH);
   delay(500);
   digitalWrite(ledPin, LOW);
   delay(500);
    digitalWrite(ledPin, HIGH);
     delay(500);
      digitalWrite(ledPin, LOW);
  }```

#

@north stream ran it, runs once then stops until pressed again

north stream Apr 12, 2020, 3:18 AM

#

You'll want two if statements: one that reads the button and toggles buttonState, and a second one (like in your original program) that runs the subroutine if buttonState is set.

clear fog Apr 12, 2020, 3:26 AM

#

@north stream Nice! the program loops 😄 I can't stop it though XD

north stream Apr 12, 2020, 3:28 AM

#

Hmm, how is your button hooked up?

clear fog Apr 12, 2020, 3:29 AM

#

https://www.arduino.cc/en/uploads/Tutorial/button.png

#

@north stream Think I found the problem I Printed buttonState and found its bouncing

#

Just restarted the board, no response when i press the button again once the program is running

#

@north stream Would the delays prevent the board from responding?

north stream Apr 12, 2020, 3:41 AM

#

The short delay(5) is to skip over bounces, but it may need to be longer. There's also a good debounce library available but I figured I'd address the basic toggle logic so you could see progress before I got into the more complicated fixes.

#

And yes, the program only checks the switch after all the LED blinking finishes (there's ways to fix that too, but it's a little more complicated)

clear fog Apr 12, 2020, 3:47 AM

#

Ah I see!

#


const int buttonPin = 2;    
const int ledPin =  5;    


// variables will change:
int buttonState = 0;        

void setup() {
  Serial.begin(9600);
  
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() {
  if (digitalRead(buttonPin)) {
  buttonState = !buttonState;
  delay(5);
  Serial.println(buttonState);
}
  if (buttonState == HIGH) {
    program1();
   
  } else {
    digitalWrite(ledPin, LOW);

  }
  
}

void program1(){
   digitalWrite(ledPin, HIGH);
   delay(500);
   digitalWrite(ledPin, LOW);
   delay(500);
    digitalWrite(ledPin, HIGH);
     delay(500);
      digitalWrite(ledPin, LOW);
     
  }```

#

@north stream so this is where I'm at, I really appreciate your help 🙂

#

@north stream So, from here what do i need to do to get it to turn back off?

potent basin Apr 12, 2020, 8:41 AM

#

@north stream Yeah, I suppose there code be all sorts of issues being caused by the TV circuit. I think go in a different direction with this. I'll strip the remote control down to pcb level and mount that right next to the chassis of the TV and then wire up the trinket to that to send a power pulse via IR by closing the pads on the standby button.

midnight harness Apr 12, 2020, 4:18 PM

#

Hi

#

I am willing to look for help on making a single step motor work

#

I am using creality3D v.1.1.4 board (from a 3D printer)

#

https://www.creality3d.shop/products/creality3d-1-1-4-mainboard-for-ender-3-ender-3-pro-ender-5

Creality 3D

Creality3D Standard Version 1.1.4 Mainboard for Ender-3/Ender-3 Pro...

Click here to buy Silent Version Mainboard for Ender-3/Ender-3 Pro Upgraded Mainboard A4988 Drive Stepper Motor Thermal Runaway Weight: 0.13kg Package Size: 15314156mm

#

And I am using a PCs power supply

#

The stepper motor is a NEMA 17

north stream Apr 12, 2020, 5:29 PM

#

The stepper motor plugs into one of the stepper motor outputs on the board (4-pin connectors marked "X", "Y", "Z", and "E").

twilit berry Apr 12, 2020, 6:53 PM

#

Hey there! Was hoping to get some help with connecting a Feather Huzzah to the Adafruit Audio FX Sound board via. Serial. It's my understanding that since the Huzzah has an ESP8266, I need to use the ESPSoftware Serial library. I have this library installed and have gotten the example swsertest code to work. I also connected the Huzzah to another board and was able to read the data the Huzzah was sending so I know that library is working.

My issue is, when I connect the Huzzah to the soundboard via Serial, I can't get it to work. Would be happy to provide more details if anyone thinks they can help - otherwise I think I've hit a roadblock.

north stream Apr 12, 2020, 8:26 PM

#

Did you ground the U/G input?

twilit berry Apr 12, 2020, 9:02 PM

#

I did to the Huzzah GND

#

Sound Board TX to Huzzah 14
Sound Board RX to Huzzah 12
Sound Board UG to Huzzah GND
Sound Board RST to Huzzah 2

north stream Apr 12, 2020, 9:50 PM

#

Looks reasonable to me. Does the library even recognize the board?

twilit berry Apr 12, 2020, 10:04 PM

#

Which library?

With the Adafruit Soundboard library I can pull up the menu through the Serial monitor, but when I use the "L" command to list the files, it says '0' files found. It uses the standard software serial library and not the ESPSoftware Serial library, so I am wondering if that is the issue there.

When I use the ESPSoftware Serial library, it recognizes the Huzzah and is able to send and receive serial data, but when I try and send serial data/connect to the sound board, I get a bunch of random data back - gibberish...

livid holly Apr 13, 2020, 1:44 AM

#

I have spent a bunch of time working on I2C comms between a RaspberryPi and Arduinos. The Arduinos are slaves. The question I can't seem to get answered on the interwebs is WHEN does the requestEvent method get called if I registered like this: myWire.onRequest(requestEvent); Does it interrupt running code, or does it wait until the 'loop' is finished?

cedar mountain Apr 13, 2020, 1:51 AM

#

It runs at interrupt time, I believe.

livid holly Apr 13, 2020, 1:58 AM

#

Does at interrupt time mean as soon as the interrupt is received it jumps to the requestEvent function even if it was in the middle of another function? Does the code continue after, or start at the beginning of 'loop'?

cedar mountain Apr 13, 2020, 2:00 AM

#

Yes, when the interrupt is received, the requestEvent will run immediately, pausing any loop code that's running, and then resume the original code afterwards. That implies that there are some things you shouldn't do inside a requestEvent if they'll take a while... often people will just set a flag and store data to be processed later in the main loop.

livid holly Apr 13, 2020, 2:06 AM

#

Great, thanks. Yes, I did find that the biggest source of my problems was println or sending an indicator to the LCD I was using. Once I removed the println and indicator code I no longer got 'freezes' in my loop code. It was weird that the LCD would change the location the characters printed at, and my loop code stopped running. I like the idea of the flag. Thanks.

cedar mountain Apr 13, 2020, 2:11 AM

#

(Personally I'm surprised that the Arduino docs don't call this sort of thing out more. In more low-level programming it's very important to know what's running in an interrupt versus not...)

midnight harness Apr 13, 2020, 7:28 AM

#

The stepper motor plugs into one of the stepper motor outputs on the board (4-pin connectors marked "X", "Y", "Z", and "E").
@north stream the problem is that I dont know the output pins for the steppers

north stream Apr 13, 2020, 12:17 PM

#

It's possible to figure out the wiring of the steppers using a multimeter to determine continuity. I do not know the pinout of your driver board.

strange ether Apr 13, 2020, 5:24 PM

#

what can i do with an arduino uno? what do u use your arduino for?

#

ping me

signal lantern Apr 14, 2020, 1:15 PM

#

@strange ether Take a look at this: https://www.makerspaces.com/15-simple-arduino-uno-breadboard-projects/

Makerspaces.com

15 Arduino Uno Breadboard Projects For Beginners w/ Code - PDF

FREE PDF - Simple Arduino Uno projects for beginners tutorial. Learn about electronic components, circuits, breadboard and programming for a Makerspace

#

I have a question

#

I hope it is Arduino related enough

#

I built a LED matrix, using SMD leds

#

And used 2n2222 transistors

#

Of course, this is only a prototype

#

I want to build a small Li-Po powered watch

#

And I want to use SMD transistors

#

Can someone recommend me a NPN or N-gate SMD transistor that works well enough for this kind of job?

#

THT is way too bulky for my specific project

#

The LEDs I use are simple SMD red LEDs with a forward current of 20mA and a forward voltage of about 2.2V. So nothing special

#

Thanks in advance! 😄

west stream Apr 14, 2020, 2:21 PM

#

Does anyone encounter an empty serial monitor while the sketch has been uploaded? Because this is my first time facing this current problem spinthink

north stream Apr 14, 2020, 2:37 PM

#

@signal lantern You can just use a SMT version of the 2N2222 such as an MMBT2222A, or a little MOSFET like a 2N7002.

#

@west stream I've seen various things cause issues with the serial monitor. Older versions of Arduino would loose the serial monitor connection when the sketch was uploaded, and you'd have to close and re-open the serial monitor. That has been largely fixed. Some boards have odd issues with sequencing, so you have to check that the serial port is ready (or have a short delay) before you can send to it.

signal lantern Apr 14, 2020, 3:48 PM

#

Oh, MMBT2222A is exactly the transistor that caught my attention, but I did not know it was actually a 2n2222 in a different package. I am still a beginner at circuit design. Thank you very much!

strange ether Apr 14, 2020, 3:56 PM

#

@signal lantern thanks

signal lantern Apr 14, 2020, 4:13 PM

#

Hmmm. I have another question

#

Is there any IC

#

That charges a Li-Po cell from 5v and protects from over-discharge?

#

I have some small boards that allow you to charge a battery

#

But I want to make it fully integrated

north stream Apr 14, 2020, 4:16 PM

#

Yes, there are many, such as the MCP73831 used in https://www.adafruit.com/product/1904

signal lantern Apr 14, 2020, 4:17 PM

#

Thanks!

west stream Apr 15, 2020, 4:58 AM

#

i see, will do! thank you MamaApproved

stark hollow Apr 15, 2020, 1:43 PM

#

could i use the change mode (in arduino interrupts) to filter through a list?
filter as in a forward button and a backward

north stream Apr 15, 2020, 1:46 PM

#

I don't see why not. I'd use the usual mechanism of having the interrupt set a flag, and the program's main loop check the flag and update the list position accordingly.

stark hollow Apr 15, 2020, 2:16 PM

#

ahh thanks

knotty rover Apr 15, 2020, 5:40 PM

#

Does anyone know if the Adafruit HUZZAH32 is dead? as of 2017 it was listed as a work in progress, and looking in the arduino ide, it still doesn't have a basic bluetooth spp example I can find

#

I have a nrf52, and bluefriend le module, thinking they could do spp, but now I understand they can't. I'm trying to find a tiny battery powered with charger module I can use with bluetooth spp profile.

#

i have a heltec esp32 wifi module with bluetooth that works great, but its a few mm too wide for the enclosure I want to use

#

so i'm trying to find another platform to switch over to

north stream Apr 15, 2020, 5:48 PM

#

I would have guessed that "UART mode" was SPP, but apparently I would have guessed wrong.

knotty rover Apr 15, 2020, 5:51 PM

#

as did I 🙂

#

any other modules I should look at? the problem Is I need a traditional serialport on a pc, so that eliminates btle

#

i have a sparkfun redboard artemis module as well, its the right size, but their code compared to adafruit libraries are horrid, and its btle, which eliminated it

#

if the heltec board will survive it, i'm tempted to just dremil off one edge of the board, with its contacts so it'll fit. I don't think any important traces run over there . . . but i'd hate to trash a good board just to fine out. On the other side I'd rather trash a board then spend hours more trying to find another board that can do spp profile

mortal ferry Apr 15, 2020, 10:41 PM

#

Does anyone have experience with a SSD1351 128x128 oled making this annoying high-pitched whining sound?

lost nest Apr 15, 2020, 10:45 PM

#

Is it one of these? https://www.adafruit.com/product/1431

OLED Breakout Board - 16-bit Color 1.5" w/microSD holder

We love our black and white monochrome displays but we also like to dabble with some color now and then. Our big 1.5" color OLED displays are perfect when you need a small display with ...

#

Usually annoying high-pitched whines are caused by inductors (so called "coil whine") or piezoelectric effects in capacitors (so called "singing capacitor")

#

You might be able to just touch various components on the board to see if you can damp it out and identify what the source is

wraith current Apr 15, 2020, 11:02 PM

#

@knotty rover i recently bought a huzzah32. bluetooth works fine.

knotty rover Apr 16, 2020, 1:22 AM

#

@wraith current thanks, I ordered one earlier today. I found out that what I was missing is that even though heltec had its own arduino esp package in the board list. after setting up the official esp boards manager, I was able to push the code unmodified still to the heltec, but I have another 30 boards I can target with the official lib.

elder hare Apr 16, 2020, 11:20 AM

#

is it ok to have this powered by 5V PSU on VIN and GND and also have the USB hooked up at the same time?
https://raw.githubusercontent.com/playelek/pinout-doit-32devkitv1/master/pinoutDOIT32devkitv1.png

elder hare Apr 16, 2020, 12:55 PM

#

anyone every worked with the sparkfun Spectrum Shield? 🙂

north stream Apr 16, 2020, 1:23 PM

#

It does say "the power source is selected automatically" here https://docs.zerynth.com/latest/official/board.zerynth.doit_esp32/docs/index.html but the schematic link https://github.com/SmartArduino/ESP/blob/master/SchematicsforESP32.pdf doesn't work and it doesn't specifically say anything about hooking up two power sources at once.

west stream Apr 16, 2020, 1:38 PM

#

Is this a boot error code? Everytime the code was uploaded to the ESP8266 module, the serial monitor always appear this. 🤔

📎 unknown.png

spice scarab Apr 17, 2020, 4:35 PM

#

I've been playing with some Herkulex smart servo motors, which use serial communication to send/receive commands to set position and such, and from what I can tell the TTL voltage is 5v. I've been using an Arduino Uno to control it which works perfectly, but I want to switch it over to my Arduino Nano 33 BLE which can only send/receive 3.3v. For now I'm not worried about whether the motors will actually run at 3.3v, but I am worried about the motors sending 5v back to the Nano 33 and destroying it. I'm thinking about using a voltage divider to bring the 5v down to 3.3v between the TX of the motor and the RX of the Nano 33, but I'm not completely sure of my understanding of serial communication to know if this is a dumb idea or not. Could anyone look at this circuit and tell me if I'm a dummy or not?

📎 unknown.png

north stream Apr 17, 2020, 5:07 PM

#

That looks fine to me.

clear fog Apr 18, 2020, 1:50 AM

#

Hi Guys, anyone got a skilling hacking things to run then with Arduino?

#

Been trying to control this board: https://arduino.stackexchange.com/questions/74968/controlling-a-ultrasonic-driver-board-with-arduino

Arduino Stack Exchange

Controlling a Ultrasonic driver board with Arduino

I Have a Ultrasonic driver board that is activated with a momentary switch acting as a toggle (click turns it on - click again turns it off).

As the main chip has no writing on it, how would I pro...

north stream Apr 18, 2020, 2:33 AM

#

8 pin chip is some generic microcontroller. Your best bet may be to do without it.

clear fog Apr 18, 2020, 3:24 AM

#

@north stream Would it also be doing the 135khz signal generation? or could i just remove it and feed 5v to its output?

#

Is that round thing on the back doing the signal generation?

#

what is that called

north stream Apr 18, 2020, 11:27 AM

#

It's unclear, there's not enough detail in the pictures to trace things out.

#

There are 3 main possibilities: 1) the microcontroller is generating the ultrasonic signal and it's just being amplified by the transistors. 2) The transistors are forming an oscillator that generates the signal whenever it's powered. 3) The transistors are using the transducers as part of the oscillator somehow.

#

When you say "the round thing", do you mean the cylindrical blue component with 3 leads? That is probably an inductor or transformer. It could be used as an oscillator component, for impedance matching to the transducers, a filter, or some combination.

#

If it's 2 or 3, yes, you could just feed 5V to the right point and it would generate the signal. If it's 1, then you'd have to come up with the drive frequency somehow (might be able to do so with an Arduino).

tulip mortar Apr 18, 2020, 10:32 PM

#

📎 IMG_0548.jpg

#

📎 IMG_0549.jpg

#

This HX711 is attached to my Feather NRF52840 https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather?view=all#pinouts

From HX711 --> Feather:
VCC -(yellow)-> 3V
CLK -(orange) -> A0
DOUT -(red) -> A1
GND -(brown)-> GND

Adafruit Learning System

Introducing the Adafruit nRF52840 Feather

The first Bluefruit Feather with USB and CircuitPython support

#

#include "HX711.h"

#define DOUT A1
#define CLK A0

HX711 scale;

float calibration_factor = -7050; //-7050 worked for my 440lb max scale setup

void setup()
{
  Serial.begin(9600);
  while (!Serial)
    delay(10); // for nrf52840 with native usb

  
   scale.begin(DOUT, CLK);
  Serial.println("Started");
}

void loop()
{
  scale.set_scale(390000);

  if (scale.wait_ready_timeout(5000)) {
    Serial.print("Scale: HX711 reading: ");
    Serial.print(scale.get_units(), 1);        
  } else {
    Serial.println("Scale: HX711 not found.");
  }
}

#

I'm getting "HX711 not found" I've been staring at this and trying different pins for the last day. I'm afraid it's not clear to me what I'm missing. Any insight would be appreciated!

cedar mountain Apr 18, 2020, 10:53 PM

#

Are you sure that the HX711 library works with the nRF, or do you know if it needs to be put on particular peripheral-capable pins?

tulip mortar Apr 18, 2020, 10:56 PM

#

Well, I know that it works, because embarrassingly enough, I had it working awhile back, and somehow lost the code. It's the pins that I'm assuming are wrong. The HX711 says something about digital output, and these are analog pins, But I couldn't find anything in the pinout that suggested what else I should use.

cedar mountain Apr 18, 2020, 11:05 PM

#

Ordinarily I'd expect any pin to work for digital peripherals, it's just that analog inputs only work on a subset of them.

green sable Apr 18, 2020, 11:08 PM

#

Hey guys! I'm looking to extend some feather boards on ribbon cables... so I need 12 pin and 16 pin single row IDC style headers along with some ribbon cable. Digikey has a data sheet for this at https://media.digikey.com/pdf/Data Sheets/AVX PDFs/8284_Series.pdf but it seems liek they don't stock the part. Anyone have a similar source or another solution?

lost nest Apr 19, 2020, 6:42 AM

#

@green sable Samtec will make pretty much anything you like, but it will have a 23 day lead time (normally 7-day, but they're back-ordered a lot due to current events)

rough torrent Apr 19, 2020, 2:53 PM

#

how come the Adafruit Arcada docs for the PyGamer don't work?
https://learn.adafruit.com/adafruit-pygamer/arcada-library

Adafruit Learning System

Introducing Adafruit PyGamer

Fits in your pocket, is fully Open Source, and can run CircuitPython, MakeCode Arcade or Arduino games you write yourself!

#

https://adafruit.github.io/Adafruit_Arcada/html/class_adafruit___arcada.html
Results in 404

#

The one for the PyBadge works though
https://adafruit.github.io/Adafruit_Arcada/html/class_adafruit___arcada___s_p_i_t_f_t.html

left sand Apr 19, 2020, 6:59 PM

#

I am trying to operate NeoPixels with the micro:bit using Yotta. I have used this library here (https://github.com/elmorg/uBit_neopixel), slighly modified to be able to be used on all pins.

However, I am running into some issues. The first time I call show(), the NeoPixels light up as they are supposed to. But for the second update, all LEDs light up yellow. Then on the third, everything is OK again. On the fourth, all yellow.

If anyone have any suggestions, it would be greatly appreciated!

knotty rover Apr 19, 2020, 9:10 PM

#

when new electronics come from a factory and have the white glue where the wires meet the pcb to help strengthen the connection what is that glue called?

azure isle Apr 19, 2020, 9:23 PM

#

One issue I have encountered with the Arduino system: Suppose I have some compiled code for which I do not have C/C++ source code. How could I incorporate it into an arduino project?
(Note that I do have the source code, but it's in Rust, which is not supported by the Arduino ide/cli.)

lost nest Apr 19, 2020, 10:56 PM

#

It looks like Arduino now supports precompiled libraries

#

https://arduino.github.io/arduino-cli/library-specification/

Library specification - Arduino CLI

Arduino Command Line Interface

gilded jay Apr 20, 2020, 12:35 AM

#

class WifiManager {

  public:
    void setupWiFi(void (*manageDisconnectionFunction)(), void (*manageHardwareButton)(), Adafruit_SSD1306 display);
    void setupOTAUpload();

};```

#

guys I have a class like this

#

as you can see I would like to pass the Adafruit_SSD1306 display as parameter to the setupWiFi function

#

I setup and instantiate my display variable inside my setup() function

#

but when I try to pass that variable to the setupWifi function

#

I have a stacktrace with an error

#

any idea of why?

#

please quote me if you answer me

lost nest Apr 20, 2020, 12:56 AM

#

@gilded jay I think you want to make that a pass by reference if you want to declare it elsewhere and then pass it in.

#

So Adafruit_SSD1306 &display

gilded jay Apr 20, 2020, 1:01 AM

#

@lost nest thanks for the answer. I tried
Adafruit_SSD1306& display
before and same results

#

I don't think that it's because I put the & in a wrong position right?

lost nest Apr 20, 2020, 1:02 AM

#

I don't think so. Do you have a compile error, or a runtime error?

gilded jay Apr 20, 2020, 1:02 AM

#

Runtime

lost nest Apr 20, 2020, 1:03 AM

#

How do you get a stacktrace at runtime off an arduino?

gilded jay Apr 20, 2020, 1:03 AM

#

Serial monitor

#

It's not a stacktrace it's like a crash and burn output 🤪

lost nest Apr 20, 2020, 1:03 AM

#

Debug logs

gilded jay Apr 20, 2020, 1:03 AM

#

Using esp8266 with Arduino SDK

lost nest Apr 20, 2020, 1:03 AM

#

Can you paste that log somewhere and link it?

gilded jay Apr 20, 2020, 1:04 AM

#

It crashes and loop

#

I'm not at the computer now. I will try to post that logs tomorrow. I really appreciate your help.

#

This is the output

#

@lost nest

#

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v645464ca
~ld

frank salmon Apr 20, 2020, 2:07 AM

#

I am struggling with coding an SPI connection to a sensor device. I am successful at reading the device's revision ID. Initially I was using the SPI lib from Arduino but changed to the Adafruit BusIO library and it looks promising ... but not quite. I am running into many brick walls now. Help?!

#

The device is an RM3100 so there's no pre-existing library except in the mbed environment ... which I can't directly use.

cedar mountain Apr 20, 2020, 2:12 AM

#

Ah, neat, that's a cool sensor. 😁

frank salmon Apr 20, 2020, 2:18 AM

#

@cedar mountain I hope so! I haven't gotten a single reading off it. I always get 0,0,0

#

doing something wrong but can't see what is the issue.

#

SPI is not as nice as I2C 😕

cedar mountain Apr 20, 2020, 2:20 AM

#

Are you able to read the REVID register to make sure the SPI bus is working?

frank salmon Apr 20, 2020, 2:21 AM

#

Yes, I believe that I have the correct return value - 0x22

#

I'm using SPI mode 0

#

so next I am confirming the BIST

#

Says to set 0b1---1111 for register 0x33

cedar mountain Apr 20, 2020, 2:24 AM

#

Cool. So then it's probably just something wrong with the measurement sequence... setting the cycle count, etc. Are you following the example in the manual?

frank salmon Apr 20, 2020, 2:25 AM

#

Yes the one for the Built in self test. And yes, I agree probably something really nit-picky that I am not seeing.

#

I'll try just a measurement for kicks.

#

I'll release this on github once done

#

correction ... once working enough 😉

#

The Adafruit BusIO library makes this work a lot easier - I'm really pleased/thankful

cedar mountain Apr 20, 2020, 2:29 AM

#

(And yes, it does look like 0x22 is correct for the REVID, so you've got the basics working.)

frank salmon Apr 20, 2020, 2:31 AM

#

Thank you for that @terse raptorKeys - makes me feel a lot better about my results so far.

#

I think my device must be fried. Gonna contact the vendor tomorrow. Thanks EdKeys

livid holly Apr 20, 2020, 2:54 AM

#

Oh wow. That does look like a nifty sensor if it truly is a more accurate compass. I found and looked at the user manual. That SPI timing diagram looks nuts. Good luck @frank salmon

frank salmon Apr 20, 2020, 3:05 AM

#

@livid holly - thanks for the encouragement. For those who are curious about magnetometers check this link where a UK physicist discusses the RM3100 extensively. https://www.liverpool.ac.uk/~cmi/mag/magChip.html

#

And then I just found this about a proton precession magnetometer which is really accurate ... http://geekysuavo.github.io/ppm/

cedar mountain Apr 20, 2020, 3:19 AM

#

Thanks! When I did a survey previously, the best "normal" magnetometer chip looked to be ST's LIS2MDL. I'm not sure if that's still the case, as it was done a few years ago.

frank salmon Apr 20, 2020, 3:24 AM

#

I have a mlx90393 that's next on the list to try. It has a wide range of field strength 5-50mT ... not sure about accuracy etc. I'm going to find out soon though. 🙂

#

Meh - maybe not.

lost nest Apr 20, 2020, 4:22 AM

#

@gilded jay Are you starting from working software and adding this display is the thing that causes the problem? I'd definitely advise starting with a minimum known working set of SW and working up slowly from there

glad folio Apr 20, 2020, 4:31 AM

#

im using a dht11 humidity/temp sensor, but when i have it hooked up it is displaying Humidity: 255% and Temp: 255C. Any idea why?

lost nest Apr 20, 2020, 5:30 AM

#

Somewhere in your data collection/signal processing/printing chain, the data is getting clipped, likely to the max of an 8-bit unsigned integer. That seems like a strange data type for temperature/humidity (I'd expect a float) so that might be something to investigate first.

#

Also, make sure that you have the recommended 10K pull-up resistor to 3.3V on the DATA line

glad folio Apr 20, 2020, 5:32 AM

#

@lost nest its is a 3 pin module with a built in resistor

lost nest Apr 20, 2020, 5:34 AM

#

It seems from the tutorials that some of the parts in the series have the pull-up resistor, and some do not

#

and that the DHT11 appears to not

#

(and when Adafruit sells the part, it comes with a resistor included in the kit)

pine bramble Apr 20, 2020, 8:45 AM

#

hello

gilded jay Apr 20, 2020, 10:49 AM

#

@lost nest
I have a lot of things that uses the displays. Problems started when I switched from Arduino to platformio and tried to create a single library that manages all the common parts for the various projects.

frank salmon Apr 20, 2020, 2:06 PM

#

@terse raptorKeys I don't know what happened and I don't think I made any major changes to the code - it's working this morning! (As you know the Arduino IDE is limited so I can't backtrack my last few edits to see what I did)

green sable Apr 20, 2020, 2:16 PM

#

@lost nest thanks! I actually spent the weekend laying out a board for the feather spec that will use standard dual row IDC connectors to let me daisy chain feathers with a single ribbon cable. I'll probably do a small run of them... I'd be curious if anyone else has done something similar.

scenic citrus Apr 20, 2020, 7:15 PM

#

I’ve been working on my first project using a MCU (ATTiny 84) without a dev board like Arduino or feather. It’s just a basic countdown timer with a display + RGB LED to act as the alarm. I drew up a schematic/wiring diagram - curious to know from those who’ve done something like this before, if I’m missing anything crucial or if there are any obvious improvements to be made? Thanks in advance

📎 image0.jpg

#

The [15:00] is a 7-seg display module with built-in TM1637 driver & 2-wire interface. Wasn't sure how best to keep power from flowing backwards to the 5V boost circuit when I have the ICSP header plugged in for programming, so I included a physical switch for now.

#

I put a 10uF cap across the power leads near ^that switch and a .1uF cap across the ATTiny's VCC/GND leads, hopefully those are reasonable + not sure if there are other places i should put them?

north stream Apr 20, 2020, 7:59 PM

#

If your display board doesn't have I2C pull-up resistors, you'll have to add then in your circuitry.

#

Note that the LED connected to the MOSI line might interfere with ISP programming.

#

Looks pretty solid overall.

rough torrent Apr 20, 2020, 8:12 PM

#

Hey, is it possible to use Adafruit_SPIFlash and Adafruit_Arcada in the same sketch? I'm getting Error compiling for board Adafruit PyGamer M4 Express (SAMD51). when I define

Adafruit_FlashTransport_QSPI flashTransport(PIN_QSPI_SCK, PIN_QSPI_CS, PIN_QSPI_IO0, PIN_QSPI_IO1, PIN_QSPI_IO2, PIN_QSPI_IO3);
Adafruit_SPIFlash flash(&flashTransport);
FatFileSystem fatfs;

#

in the same sketch with Arcada

#

The example sketches for Arcada and SdFat work by themseleves

#

I want to read and write text files with an Arcada interface
So I poked around in the examples menu (I have so many libraries installed it's stupid) and found the Adafruit_SPIFlash libraries

scenic citrus Apr 20, 2020, 8:22 PM

#

Thanks @north stream. I had the same concern re: sharing MOSI with an LED pin... it seems to work fine on a breadboard but maybe i shouldn't rely on it. Assuming I have to share one LED pin with one of my ICSP pins [MOSI, MISO, or SCK], are any of those 3 preferred - ie. less susceptible to interference from having a LED on the same pin? Not sure there is an easy way to isolate them

north stream Apr 20, 2020, 8:23 PM

#

Easy way is to have the pin drive a MOSFET that drives the LED, but that is an additional part.

#

Whichever pin the AVR drives would be the logical candidate for the LED, and it may well be MOSI if the AVR is the master during SPI programming (I don't know if it's the master or slave then)

scenic citrus Apr 20, 2020, 8:32 PM

#

thanks @north stream - that makes sense. I think i'll just go for it rather than adding a MOSFET since it seems to work ok with my setup, but good to know for next time. Will do a bit of reading on MOSI vs. MISO during programming.

spice scarab Apr 20, 2020, 10:08 PM

#

Does anyone know of a web tool that lets you create Arduino tone melodies?

wanton mirage Apr 21, 2020, 2:17 AM

#

Having trouble to getting serial.print to output a readable negative value

#

-1 becomes 16382

#

to clarify, it's an expression that evaluates to between -128 and 127 and displays incorrectly when it should be negative.

#

e.g. Serial.print(xHueDelta32 / 32768);

safe shell Apr 21, 2020, 2:25 AM

#

What type is xHueDelta32? See also: https://www.arduino.cc/en/Reference.Arithmetic

wanton mirage Apr 21, 2020, 2:26 AM

#

it's an int32_t from the fastled lib

safe shell Apr 21, 2020, 2:40 AM

#

Not sure how it handles "32768" if you're on a board with 16-bit int(typically integer constants are treated asint, but you'd think it would handle it appropriately). Does it make any difference if you use32768L or explicitly assign or cast to (signed) long?

wanton mirage Apr 21, 2020, 2:47 AM

#

Casting it does not seem to have an effect

#

but since that input type is non-standard I guess I'm not surprised. I guess I should do my math separately into a container

safe shell Apr 21, 2020, 2:51 AM

#

If you don't expect integer answers (seems unlikely), what about 32768.0

#

(and assuming xHueDelta32 is always within ±4 million and change)

wanton mirage Apr 21, 2020, 2:55 AM

#

adding the .0 does change the output but doesn;t fix the wraparound problem. I trried doing the math into a variable and then printing the variable and got the same result as the original

#

I think I have to cast it into a string or char

safe shell Apr 21, 2020, 3:03 AM

#

I don't know what to make of that int32_t typedef, and how Arduino compiler handles it. Arduino rules for types and division are pretty clear, but... ?

wanton mirage Apr 21, 2020, 3:05 AM

#

anecdata, thanks for your thoughts. This is a really minor issue at the moment.

safe shell Apr 21, 2020, 3:06 AM

#

I'm curious what you end up finding out

north stream Apr 21, 2020, 4:34 PM

#

From inttypes.h: ```c
typedef int32_t int_farptr_t;

cedar mountain Apr 21, 2020, 4:41 PM

#

I think that's the other way around, isn't it, a definition of the farptr type?

potent ferry Apr 21, 2020, 4:53 PM

#

Hi guys. I have six of these boards nRF52840

Do you have any Arduino Bluetooth sample code for using six of these boards in a peer to peer network setup?

Thanks!

clear fog Apr 22, 2020, 12:30 AM

#

Hi Guys, I was if i can program a Pro Mini 05 ATmega328 with a USBTinyISP Programmer

#

https://www.auscomtech.com.au/product/5v-micro-usb-tiny-avr-isp-attiny44-usbtinyisp-programmer-arduino-bootloader/

AUSCOM Computers & Controls

admin

5V Micro USB Tiny AVR ISP ATtiny44 USBTinyISP Programmer Arduino Bo...

Description: 100% brand new and high quality USBtinyISP is designed for AVR, based on USB connector’s ISP downloader. Officially supported by Arduino IDE and compatible usbtinyisp, we can burn Arduino bootloader onto chips, and practically program any Atmel AVR microcontroller...

#

https://core-electronics.com.au/pro-mini-05-board.html

Core Electronics

Pro Mini 05 Board

It’s blue! It’s thin! It’s the Pro Mini! This is a 5V board running the 16MHz bootloader. Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need

noble fjord Apr 22, 2020, 1:23 AM

#

got question i am working making a loop antenna controller using a steeper motor but i want to controll it with a ir remote is any idea how to use it with arduino uno stepper motor and stepper driver and ir modual

north stream Apr 22, 2020, 1:53 AM

#

Yes, you can run a stepper motor with a driver board, and use an IR receiver and an IR library to get commands, then your code could control the motor based on the IR commands.

wraith current Apr 22, 2020, 5:57 AM

#

RE Huzzah32 featherboard. I'm wondering which ADC channel the battery sense pin is on because I really would like to be able to measure the battery while still using the wifi

Note you can only read analog inputs on ADC #1 once WiFi has started```

#

Nevermind, think I found the answer, it's on channel1

📎 Screen_Shot_2020-04-21_at_21_Tue_8.01.21_PM.png

lost nest Apr 22, 2020, 6:06 AM

#

A1_7

#

per schematic

calm crown Apr 22, 2020, 3:11 PM

#

how do you write a for loop with sensor, like, if the sensor is <5 cm away from object, let a led burn

safe shell Apr 22, 2020, 3:14 PM

#

ESP32 fwiw... ADC1 pins on the ESP32 are: 36,37,38,39,32,33,34,35 (in channel order). 37 & 38 are not exposed on the Adafruit Feather Huzzah or Huzzah Breakout. 36 & 39 are the Hall Effect Sensor. 32 & 34 are best for general purpose analog input (33 also unless the ESP32 is running the NINA firmware, in which case it's used for SPI). 35 as you found is 1/2 battery voltage on the Feather (but it's available for general purpose analog input on the Breakout).

north stream Apr 22, 2020, 5:25 PM

#

@calm crown Something like ```c
void loop()
{
if (sensor.distance < 5) {
digitalWrite(LED_PIN, HIGH);
} else {
digitalWrite(LED_PIN, LOW);
}
}

calm crown Apr 22, 2020, 7:23 PM

#

GWloopyGok

#

i was searching for the sensor.distance function

#

thanks man GWeniPopcorn

north stream Apr 22, 2020, 7:27 PM

#

I didn't know what sensor you were using, how it was read, or what units were returned, so I just put in sensor.distance as a placeholder to illustrate the flow.

slow rapids Apr 22, 2020, 7:55 PM

#

Hello! I'm experimenting with an ESP8266 together with a MAX31855 to push messages to an MQTT server. Is it possible to run two "serial" communications on one chip or does that make the complexity go up a notch?

glass hound Apr 22, 2020, 7:55 PM

#

📎 JPEG_20200422_125513.jpg

#

This is my board and back of screen

slow rapids Apr 22, 2020, 8:06 PM

#

Oh snap, it works now. I love you all.

noble fjord Apr 22, 2020, 8:19 PM

#

ok i just need to be able to figure out code for the ir commands then @north stream

#

not good at coding for adruino @north stream

north stream Apr 22, 2020, 8:34 PM

#

There's a tutorial on using an IR library at https://learn.adafruit.com/using-an-infrared-library that might help but there will be a certain amount of coding you'll still have to do to implement whatever logic you need to control the motor in response to IR signals.

#

Fortunately, the libraries do most of the heavy lifting for you, so your logic will just be something like "When the forward code is received, turn the motor on in the forward direction"

noble fjord Apr 22, 2020, 8:37 PM

#

i am thinking about using brainy bits code for it

#

@north stream

#

https://www.brainy-bits.com/control-stepper-motor-with-arduino/ @north stream

Brainy-Bits

brainy-bits

Control a Stepper Motor with an Arduino and IR Remote

TUTORIAL

Control a Stepper Motor using an IR Remote and an Arduino

OVERVIEW
Here's a fun and easy way to control a Stepper motor at a distance using an IR Remote control.

The stepper we are using comes with its own driver

north stream Apr 22, 2020, 8:41 PM

#

That code looks like a good starting point: you'd just have to figure out what codes you get from your remote control if they're not the same as the one in that example.

noble fjord Apr 22, 2020, 8:48 PM

#

DO you know if the uln2003 stepper motor driver board would work with the nema 17 stepper motor @north stream

north stream Apr 22, 2020, 8:50 PM

#

The NEMA 17 is a size description, not a power description. The ULN2003 is good for up to 0.5 amps and 50 volts. If your motor will run within those limits, it should be fine.

noble fjord Apr 22, 2020, 8:51 PM

#

its only a 1.3 amp motor

#

i dont think it will work then

north stream Apr 22, 2020, 8:56 PM

#

While you can run steppers on lower than rated current with less torque, that's a good bit less: you might want a beefier driver for those motors.

noble fjord Apr 22, 2020, 8:58 PM

#

i just cant find a smaller board to controll it

#

will a h brige drive controller work @north stream

north stream Apr 22, 2020, 9:04 PM

#

Yes, H bridge controllers are a popular choice for stepper motors.

#

The L298N chip is one reasonable choice, and there are several chips like the TB6612 designed for driving steppers.

noble fjord Apr 22, 2020, 9:10 PM

#

ok but will i be able to do what i need

#

@north stream

north stream Apr 22, 2020, 9:11 PM

#

It depends on what you have available, what you're trying to do, and what you're comfortable with.

restive acorn Apr 22, 2020, 9:57 PM

#

Hey, I'm looking to run 2.5m of SK9822 144 LED/m from an Arduino and was wondering what Ardunio would be suitable.

noble fjord Apr 22, 2020, 10:07 PM

#

arduino uno @restive acorn

#

or the mega @restive acorn

#

what you going to use it for @restive acorn

restive acorn Apr 22, 2020, 10:09 PM

#

I'm looking to create a simple light + animation for my mini fridge

noble fjord Apr 22, 2020, 10:09 PM

#

then u might want to use a nano then

#

twisted

restive acorn Apr 22, 2020, 10:10 PM

#

the smaller the better is my thought. Q1 was the board, Q2 is the power 😂

#

I was thinking about hooking it up to the existing power in the fridge as there's a light already in there

noble fjord Apr 22, 2020, 10:10 PM

#

yeah but smaller not always better

restive acorn Apr 22, 2020, 10:10 PM

#

but wouldn't know what converter I'd need

noble fjord Apr 22, 2020, 10:11 PM

#

well get u a ac buck converter

#

what voltage does the light in the mini fridge use

#

@restive acorn

restive acorn Apr 22, 2020, 10:12 PM

#

just hunting down the model of the fridge

noble fjord Apr 22, 2020, 10:13 PM

#

let me know chaz and i can google a down converter for u

restive acorn Apr 22, 2020, 10:13 PM

#

https://www.husky-lifestyle.co.uk/husky-coca-cola-undercounter-fridge-hus-hy211/

Coca-Cola Undercounter Drink Cooler · Husky Lifestyle

Iconic Coca Cola branding sets this Undercounter Drinks Cooler apart. Enjoy perfect drinks from your own Drinks Cooler. Order yours today!

#

similar to this

noble fjord Apr 22, 2020, 10:14 PM

#

i need you to take a voltage meter and messure what the voltage is the out put of the light

#

@restive acorn

restive acorn Apr 22, 2020, 10:16 PM

#

yeah I definitely don't have one of those lying about

#

I'll put it on the shopping list

noble fjord Apr 22, 2020, 10:18 PM

#

when u do pm me

#

@restive acorn

restive acorn Apr 22, 2020, 10:20 PM

#

anything else you think I'll need?

glass hound Apr 22, 2020, 10:22 PM

#

Any notes on my units

noble fjord Apr 22, 2020, 10:32 PM

#

some wires and clear heat shreank @restive acorn

#

maybe set of small screw drivers @restive acorn

restive acorn Apr 22, 2020, 10:33 PM

#

And another quick question, is there a simple on off gate when two contacts are touching? ie fridge open and closed

noble fjord Apr 22, 2020, 10:34 PM

#

when u can tell me what voltage is being put into the light then i can tell u what step down deal to get

restive acorn Apr 22, 2020, 10:34 PM

#

thanks @noble fjord, this is the most help I've got out of a discord channel!

noble fjord Apr 22, 2020, 10:34 PM

#

you can use a the same thing a 3d printer to limited pos switch @restive acorn

glass hound Apr 23, 2020, 9:24 AM

#

📎 JPEG_20200423_022407.jpg

#

My led strip

#

i think they are white i cant remember.. they have 2 wires so.

#

how do i gat them to run with out a modulater

#

i just need them to turn on and not be bright

#

very dim

dusk summit Apr 23, 2020, 12:06 PM

#

Hi guys, I'm an escape room designer, and I'm looking to use an arduino to power one of the puzzles. For context, I haven't used an arduino previously, and my electronics experience generally is very limited (previously I've focused on designing mechanical/tactile puzzles). The intent of the puzzle is for players to link up a number of wires between different headphone jacks, and for a laser transmitter module to activate upon them doing so correctly (this will form the basis of their next puzzle). My design so far is as follows:

📎 Connect_the_wires_mk_2_screenshot.PNG

#

📎 Connect_the_wires_mk_2.fzz

#

My question (very basic as it is!), is where on the arduino must I attach the laser transmitter module, so that I can trigger it upon the puzzle being solved?

#

Ah, I forgot to mention- in regards to the LEDS, they serve only to indicate to the players once a wire is correctly connected. They are not essential to the puzzle functioning.

north stream Apr 23, 2020, 12:19 PM

#

It depends a little on how your laser transmitter is powered, but a common setup is to connect a switching transistor to a free GPIO pin and use that to switch the ground pin of the load (in your case, the laser transmitter)

elder hare Apr 23, 2020, 1:14 PM

#

   #include <FastLED.h>
   #define FASTLED_ESP8266_RAW_PIN_ORDER

   #define NUM_LEDS_PER_STRIP 199             // NUM LEDS PER STRIP (NLPS)                                         
   #define NUM_STRIP 6                        // NUM STRIPS (NS)
   #define COLOR_ORDER GRB                    // COLOR ORDER
   #define LED_TYPE WS2812B                   // LED TYPE
   #define FRAMES_PER_SECOND  120             // FRAMES PER SECOND (FPS)

   #define PIN D8                             // LED PIN Studio Lights = 15 / D8

   CRGB Strip[NUM_STRIP][NUM_LEDS_PER_STRIP];

   FastLED.addLeds<WS2812B, PIN, GRB>(Strip[0], NUM_LEDS_PER_STRIP).setCorrection(TypicalLEDStrip);

why do i get this error

https://pastebin.com/2fcbZ8Qb

Pastebin

[Arduino] In file included from C:\Users\Mythical Force\Documents\A...

north stream Apr 23, 2020, 1:27 PM

#

"Invalid pin specified"? Might mean you specified an invalid pin. It looks like the library is looking for an hardware SPI pin and there aren't any.

elder hare Apr 23, 2020, 1:28 PM

#

as you can see in the comment on PIN i've used D8 and 15 but none of them work :S

north stream Apr 23, 2020, 1:29 PM

#

You'll have to choose a pin that works, I suppose.

elder hare Apr 23, 2020, 1:30 PM

#

the pin works :S

#

it's the pin im using right now on my ESP8266 :S im just cleaning up my code

#

omg

#

....

#

i had to change the order from

   #include <FastLED.h>
   #define FASTLED_ESP8266_RAW_PIN_ORDER

to this

   #define FASTLED_ESP8266_RAW_PIN_ORDER
   #include <FastLED.h>

north stream Apr 23, 2020, 1:48 PM

#

Ah yes, good catch. I totally missed that too.

dense valve Apr 23, 2020, 2:53 PM

#

FYI, there might be a difference in output buffering on nrf52840 boards in Arduino code: https://forums.adafruit.com/viewtopic.php?f=65&t=164747

Adafruit customer service forums • View topic - CLUE Serial seems n...

karmic stream Apr 23, 2020, 4:14 PM

#

do all interrupts of the ATmega328p set an "interrupt active flag"? I seem only to find a few that use an "Interrupt Flag Register", but not all.

calm crown Apr 23, 2020, 4:46 PM

#

@north stream sorry to bother you again, but your function doesn't work, btw, i'm using HC-SR04

#

i can send screenshot of my code, if that would help you

north stream Apr 23, 2020, 5:18 PM

#

How does it not work?

#

"doesn't work" doesn't tell me anything.

calm crown Apr 23, 2020, 5:30 PM

#

📎 unknown.png

flint smelt Apr 23, 2020, 6:49 PM

#

Hey, is there a way to put the Feather nRF52840 into a low power or sleep mode until an interrupt is triggered?

#

Or for the Feather M4

cedar mountain Apr 23, 2020, 7:12 PM

#

The chips are certainly capable of it. Just a question of library support for your framework.

flint smelt Apr 23, 2020, 7:23 PM

#

Just compiling with regular Arduino and Adafruit libraries, etc

glass hound Apr 23, 2020, 7:31 PM

#

ca anyone help me with my above project

flint smelt Apr 23, 2020, 7:38 PM

#

@glass hound I did something similar but my lights came with a dimmer and I just set the dimmer where I wanted it.

glass hound Apr 23, 2020, 7:38 PM

#

did you plug it straight in

#

or did you une a transistor

flint smelt Apr 23, 2020, 7:39 PM

#

The LED strip I bought came with a 5v power supply and a dimmer, all connecting with barrel jacks

#

I bet you could create a PWM signal with a 555 timer and a transistor (as well as some resisters and caps to set the duty cycle)

woven mica Apr 23, 2020, 7:48 PM

#

@calm crown you use the pinMode wrong. It has to be pinMode(red, OUTPUT);.
And you dont reset the red LED to LOW if the distance is > 10. Same for the red_1. So you eould end with both lit up.

winter furnace Apr 23, 2020, 9:37 PM

#

Hey y'all; I'm in a bit over my head with this and I can't seem to find much on google. I'm using the 8266 arduino core to host a discord bot. To do this I need to hold open the discord websocket at the same time i'm sending data to their REST api, both on 443, but if I have one WifiClientSecure connected to something on 443, the other connection fails.

#

On a computer with bsd style ports, I think the network stack would normally establish a connection originating at two different local ports

#

but trying to figure out how that applies to the esp network stack isn't getting me very far on google. I haven't gotten quite to the point of putting together a minimal reproduction and trying to fix that yet, but if anyone could point me in the right direction if I'm barking up the wrong tree, I would really appreciate it!

#

the esp can service more than one client simultaneously as a server, so i'm pretty sure it's possible

#

i have my project working now by killing the websocket connection every time I want to issue a command and then resuming it, but feelsbadman

glass hound Apr 23, 2020, 10:48 PM

#

do you guys know any tutorials with an led strip that only has 2 wires

north stream Apr 23, 2020, 10:58 PM

#

Those normally only need power of the appropriate voltage to light.

glass hound Apr 23, 2020, 11:02 PM

#

they say 12v my arduino only has 5vand vin

#

can i use both or one

north stream Apr 23, 2020, 11:07 PM

#

You can control it with an Arduino by using a switching transistor

#

You would need a source of 12 (or so, it's not critical) volts. https://learn.adafruit.com/adafruit-arduino-lesson-13-dc-motors/transistors

glass hound Apr 23, 2020, 11:13 PM

#

📎 20200423_161222.jpg

#

on my arduino uno can i use the dc plug with this and get the 12v i need

north stream Apr 23, 2020, 11:15 PM

#

Yes, you can probably plug it into your Arduino which will regulate it down to 5V for its own use and make the 12V available at the Vin pin. Alternatively, you could power the Arduino some other way (like via USB) and just use that supply to power the LED strip.

glass hound Apr 23, 2020, 11:17 PM

#

si i can get 12v from the usb?

#

and a transistor

#

📎 20200423_161621.jpg 📎 20200423_161630.jpg

north stream Apr 23, 2020, 11:20 PM

#

No, USB is 5V

glass hound Apr 23, 2020, 11:20 PM

#

Also i can get this to work with the yellow and red

north stream Apr 23, 2020, 11:21 PM

#

The transistor is to allow the small amount of current an Arduino can safely provide, to control the larger amount of current (and voltage) the LED strip uses.

#

That looks like a PIR sensor. Do you mean the yellow and red wires from the PIR sensor, or yellow and red LEDs or something else? I'm confused.

glass hound Apr 23, 2020, 11:23 PM

#

wires i dont know what the 2 blue ones are for

#

what transistor is best for this

#

and i forgot how to identify them so i guess ill google it

#

and what resistor would i need

north stream Apr 23, 2020, 11:48 PM

#

You have a few choices. You can use a MOSFET like https://www.adafruit.com/product/355 and don't really need a resistor.

#

Or you can use a bipolar transistor like https://www.adafruit.com/product/976 with maybe a 1k base current limiting resistor.

#

It depends somewhat on your preferences and the characteristics of your LED strip.

glass hound Apr 24, 2020, 12:02 AM

#

📎 JPEG_20200423_170156.jpg

#

I have one of these

north stream Apr 24, 2020, 12:05 AM

#

That's a 200V 9A N-channel MOSFET, it would probably do the job nicely.

#

Gate threshold voltage is 4V max, so an Arduino should be able to control it effectively.

glass hound Apr 24, 2020, 12:28 AM

#

📎 dio1.png

#

this is what i have so far

#

save to plug in.. lol

#

what is a good template for this in the IDE

livid holly Apr 24, 2020, 12:38 AM

#

@calm crown I am not sure what is in the sonar library, but they are simple devices. You could try this too https://create.arduino.cc/projecthub/Isaac100/getting-started-with-the-hc-sr04-ultrasonic-sensor-036380

Arduino Project Hub

Getting Started with the HC-SR04 Ultrasonic sensor

A basic introduction to the low cost and accurate HC-SR04! By Isaac100.

#

I used code similar to that when I played with them.

glass hound Apr 24, 2020, 3:30 AM

#

what am i missing from the diagram above

cyan citrus Apr 24, 2020, 6:51 AM

#

hey guys how's the pwm frequency on the adafruit feather M0 (https://learn.adafruit.com/adafruit-feather-m0-radio-with-rfm69-packet-radio/overview)
I'm trying to use it for a fan that uses 25kHz for its speed control
I've found someone who figured out how to use an arduino uno on a fan requiring 25kHz but I'm not sure if I need to adjust it for the feather M0
https://forum.arduino.cc/index.php?topic=415167.0

Thx for any help!!

Controlling 4pin fan with PWM 25Khz

onyx edge Apr 24, 2020, 2:09 PM

#

Hi!

#

I would like to connect multiple moisture sensors to nodemcu

karmic rose Apr 24, 2020, 2:10 PM

#

Hi guys, could someone help me with the JS library (Johnny five), to control the arduino ?

onyx edge Apr 24, 2020, 2:12 PM

#

I plan using following tutorial as example - https://www.hackster.io/mjrobot/iot-made-simple-monitoring-multiple-sensors-db887f , the tutorial mentions I should " Use a 4.7K ohms resistor between VCC (3.3V) and Data (D4)" - my question is - why ? 🙂

Hackster.io

IoT Made Simple: Monitoring Multiple Sensors

Collecting multiple data from multiple sensors connected to the same 1-wire bus and monitoring them from the internet with Blynk. By MJRoBot.

#

what is it's purpose

pine bramble Apr 24, 2020, 3:22 PM

#

The resistor holds the data bus high or in a "I'm not talking" state so other devices on the data bus know they can send data. Per the spec sheet, a 480uS low pulse signals that a device on the data bus has data to send. See page 10 of the spec sheet.
https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf
Enjoy!

onyx edge Apr 24, 2020, 3:31 PM

#

The resistor holds the data bus high or in a "I'm not talking" state so other devices on the data bus know they can send data. Per the spec sheet, a 480uS low pulse signals that a device on the data bus has data to send. See page 10 of the spec sheet.
https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf
Enjoy!
@pine bramble thank you. any insights if I can pull anything similar off with simple moisture sensors? generally speaking they have digital output too although majority of tutorials mention only analog output

pine bramble Apr 24, 2020, 3:34 PM

#

Digital output and data output are often different things. Interfacing will depend on the specific device you use.

onyx edge Apr 24, 2020, 3:38 PM

#

one solution I came across, but it requires diodes which I don't have 😦

📎 unknown.png

pine bramble Apr 24, 2020, 3:40 PM

#

Sure, that is an excellent example of using analog inputs instead of data inputs.

north stream Apr 24, 2020, 3:40 PM

#

That's more of a multiplexor, probably not what you need unless you're running out of I/O pins.

onyx edge Apr 24, 2020, 4:04 PM

#

Have seen multiplexer mentioned too somewhere, perhaps I have some IC that supports that..

#

📎 IMG_20200424_1914315862.jpg

#

Perhaps any of those could be used as multiplexer?(there's no 4051)

north stream Apr 24, 2020, 4:39 PM

#

The 4066 can be used as a multiplexor

onyx edge Apr 24, 2020, 5:41 PM

#

I'm failing to read digital output of moisture sensor 😦

#

here's my code: https://pastebin.com/jTBSPC17

Pastebin

// Sensor pins #define sensorPower 5 // D0 #define sensorPin 4 ...

onyx edge Apr 24, 2020, 6:23 PM

#

I figured the power was off :/

sinful mountain Apr 24, 2020, 9:20 PM

#

I like that the Adafruit HUZZAH32 – ESP32 Feather Board has WiFi & BLE, but the caveats listed (in 2017) sound like the library support isn't there yet. Are these things all still true? And am I correct, this is an Arduino only board, no CircuitPython?

"As of this writing, May 2017, the ESP32 Bluetooth core is still under development and there's only one basic beacon example for use with the Arduino IDE core. So we put this one at the bottom of the list. You can check the ESP32 Arduino core and what has been added here, if there's an example for what you want to do, then you're in luck!"

https://learn.adafruit.com/adafruit-feather/bluetooth-feathers#esp32-feather-8-17

Adafruit Learning System

Introducing Adafruit Feather

Boards of a Feather flock together!

pine bramble Apr 24, 2020, 9:24 PM

#

@sinful mountain It's probably true, iirc.

sinful mountain Apr 24, 2020, 9:27 PM

#

Thanks @pine bramble

pine bramble Apr 24, 2020, 9:28 PM

#

I think it has something to do with loading code or bootstrapping.

#

circuitpython should list which boards it supports in its README.md

#

Espruino WiFi and Espruino Nano seem to be supported, and NRF52 boards are supported.

#

I don't use any of them; I use SAMD21, SAMD51 and now STM32F405. ;) 8051 in the past.

#

https://github.com/adafruit/circuitpython
https://circuitpython.org/downloads

#

Supports only SAMD21, SAMD51, nRF52840, CXD56, STM32F4 and i.MX RT ports.

#

So I think that drives the wooden stake through .. (garbled)

safe shell Apr 24, 2020, 9:33 PM

#

garbled?

sinful mountain Apr 24, 2020, 9:34 PM

#

And there you go. not-garbled at all... totally clear. 😉

#

Thanks!

pine bramble Apr 24, 2020, 9:36 PM

#

;)

#

It's art, man. I don't explain my /art/ ;)

safe shell Apr 24, 2020, 9:37 PM

#

Looks promising that ESP32-S2 will get added to that list

blissful slate Apr 24, 2020, 11:10 PM

#

Can anyone explain NVIC priority on the Feather M4?

#

https://github.com/arduino/ArduinoModule-CMSIS-Atmel/blob/46ab1021146152a64caf1ddbb837d8181b8faa35/CMSIS-Atmel/CMSIS/Device/ATMEL/samd51/include/samd51j19a.h#L530

GitHub

arduino/ArduinoModule-CMSIS-Atmel

Atmel Smart ARM devices CMSIS module for Arduino IDE - arduino/ArduinoModule-CMSIS-Atmel

#

This appears to be what I'm building against

#

#define __NVIC_PRIO_BITS 2

#

but the datasheet says there are 3 bits

#

The more recent version from atmel seems to have it fixed

#

http://packs.download.atmel.com/

sinful mountain Apr 24, 2020, 11:52 PM

#

Looks promising that ESP32-S2 will get added to that list
@safe shell I watched tannewt working on it in a livestream last week. 😉

safe shell Apr 25, 2020, 12:35 AM

#

@sinful mountain I'm hoping for a Feather board eventually. Have you found these BLE and BluetoothSerial examples? https://github.com/espressif/arduino-esp32/tree/master/libraries

glass hound Apr 25, 2020, 2:27 AM

#

does anyone know what the 4th wire on my PIR is for i have 2 blue ones

flint smelt Apr 25, 2020, 2:30 AM

#

The backlight on the TFT FeatherWing (ILI9341) can only be controlled by soldering the LITE pad to a GPIO, correct?

#

@glass hound you can never have too many blue wires 😛

#

@glass hound do you have a model number?

glass hound Apr 25, 2020, 2:32 AM

#

just conji

flint smelt Apr 25, 2020, 2:34 AM

#

I'm probably not going to be much help without some identifying markings.

glass hound Apr 25, 2020, 2:40 AM

#

📎 20200423_161621.png

#

📎 JPEG_20200424_194603.jpg

#

📎 JPEG_20200424_194624.jpg

flint smelt Apr 25, 2020, 3:17 AM

#

The Prop-Maker FeatherWing isn't compatible with the TFT FeatherWing, right?

safe shell Apr 25, 2020, 3:31 AM

#

@flint smelt Compatible in what way? Which TFT FeatherWing?

#

You can cut traces (on the 3.5" and 2.4" TFT FeatherWings) and use other pins for TFT_CS, TFT_DC, RT_CS, and SD_CS. MiniTFT + Joy ...you'd have to switch two pins.

#

Looks like you'd have to use some of: A1-A4; D4 (on the Feather M4)

#

Analog pins are given preference in most FeatherWing board designs, it seems, so the digital-only pins on the short side get a little overloaded with certain wing combinations (TFT defaults overlap propmaker and adalogger, for example). The EPD wings use 9 & 10 too, like the bigger TFTs.

glass vapor Apr 25, 2020, 11:58 AM

#

hello can someone help me with a really simple motor driver circuit?

#

I am kind of a noob when it comes to motors and arduino

#

this is the circuit (disconnect battery while trying to troubleshoot where I might be wrong).

📎 P_20200425_150112_vHDR_Auto.jpg

#

#include<iostream>
using namespace std;

//define list
int debug;

void setup() {
pinMode(22,OUTPUT);
pinMode(23,OUTPUT);
pinMode(2,OUTPUT);
}

void loop() {
debug=1;
if(debug==0){
digitalWrite(2,HIGH);
digitalWrite(22,HIGH);
digitalWrite(23,LOW);
delay(5000);
digitalWrite(2,LOW);
digitalWrite(22,LOW);
digitalWrite(23,HIGH);
delay(5000);
}
if(debug==1){
digitalWrite(2,LOW);
digitalWrite(22,LOW);
digitalWrite(23,LOW);
}

#

this is the code (debug is now set to 1 to stop the ports from going high-low-high... etc)

elder hare Apr 25, 2020, 3:02 PM

#

how do i access a variable from one class in another? like

// class that has the variable i need access to
class a {
Var_i_need_to_access;
}

// Class that needs the variable from Class a
class b {

}

north stream Apr 25, 2020, 4:11 PM

#

If you declare it as public you can reference it as an instance member. If it's also static, you can also reference it as a class member.

opal cipher Apr 25, 2020, 4:28 PM

#

having a problem with Bounce2 and STM32duino ..

#

basically we need this code from the library to catch our board as well

#

´´´#if defined(ARDUINO_STM_NUCLEO_F103RB) || defined(ARDUINO_GENERIC_STM32F103C)
pinMode(pin, (WiringPinMode)mode);
#else
pinMode(pin, mode);
#endif´´´

#

where would we find the definitions for boards like ARDUINO_STM_NUCLEO_F103RB ?

#

then we could just add another case to the library

#

using an STM32 F407V from the stm32duino boards

#

we end up with this issue https://github.com/thomasfredericks/Bounce2/issues/49

GitHub

error: invalid conversion from 'int' to 'WiringPinMode' [-fpermissi...

Hello, I try to use the bounce2 under STM32 arduino code and get the following error: .platformio\lib\Bounce2_ID1106\src/Bounce2.h:188:26: error: invalid conversion from 'int' to &a...

#

okay a workaround seems to be using the boards definitions by STM directly rather than STM32duino

stable hinge Apr 25, 2020, 6:06 PM

#

Hi guys, is there anyone who knows if Pin 7 of the 5V ItsyBitsy 32u4, which is also Interrupt 4, can be used to wake up from sleep mode? It somehow doesn't work in my case while there's no problem with waking up with all the other Interrupts available.

glass hound Apr 25, 2020, 6:56 PM

#

does anyone have any sugestions for what my 4th wire is for

north stream Apr 25, 2020, 7:51 PM

#

Could be brightness detect, inhibit, configuration, analog output, or probably other stuff.

south flare Apr 25, 2020, 10:17 PM

#

Need help changing a few pin locations for 16x32 LED matrix with Adruino Uno. Digital pins 2 and 3 are used for Red Pin 1 and Green Pin 1 but there is no place in the code to change this. Tried combing through RGBmatrixPanel.h to see if I could change it there but all I found was uint8_t rgbpins[6]; which I am not sure how to modify. Any help with this? Digital pins 11 and 12 are open so how do I switch 2 and 3 to 11 and 12?

cedar mountain Apr 25, 2020, 10:31 PM

#

It looks like the pin numbers are provided in the initializer, so it would be changed wherever your program creates the RGBMatrixPanel(1, 2, 3, ...) object.

glass trail Apr 25, 2020, 10:33 PM

#

anyone know how to wrap text with LiquidCrystal?

south flare Apr 25, 2020, 10:34 PM

#

If I take the testcolors_16x32 example sketch for instance, the only pins I can define are CLK, OE, LAT, A, B, and C. The pins for R1 R2 B1 B2 G1 and G2 are not defined.

glass trail Apr 25, 2020, 10:34 PM

#

sorry @south flare idk what youre talking about

#

im new

#

can you simplify it for me? thanks

cedar mountain Apr 25, 2020, 10:35 PM

#

Ah, here it is:
static const uint8_t defaultrgbpins[] = { 2,3,4,5,6,7 };
So changing the rgbpins[] values is indeed what you want to do.

glass trail Apr 25, 2020, 10:37 PM

#

oh okay ill try that

#

should i put that in void loop() or void setup()?

cedar mountain Apr 25, 2020, 10:38 PM

#

@glass trail , this is about @south flare 's question.

glass trail Apr 25, 2020, 10:38 PM

#

oh...

#

do you know any place that i can help with arduino then?

south flare Apr 25, 2020, 10:40 PM

#

@cedar mountain I can't find that under RGBmatrixPanel.h Where is that chunk of code?

cedar mountain Apr 25, 2020, 10:40 PM

#

This is the right place, but not every question gets answered instantly, depending on who is around and what their knowledge is.

south flare Apr 25, 2020, 10:40 PM

#

@cedar mountain ah nvm

cedar mountain Apr 25, 2020, 10:41 PM

#

@south flare You shouldn't need to modify the library itself, but I think you can change the values in your own code, like panel.rgbpins[0] = 11;

south flare Apr 25, 2020, 10:42 PM

#

@cedar mountain Ok, Ill give that go. Thanks for the help

cedar mountain Apr 25, 2020, 10:44 PM

#

@glass trail With a quick look at the library, it doesn't look like LiquidCrystal includes word-wrapping, so you may need to do that yourself in the text that you give it.

glass trail Apr 25, 2020, 10:45 PM

#

oh

south flare Apr 25, 2020, 10:54 PM

#

@cedar mountain Since matrix.rgbpins is not a member of the RGBmatrixPanel class, I cannot seem to figure out how to change the pins in my sketch and not in the .h file

cedar mountain Apr 25, 2020, 10:58 PM

#

Ah, it looks like you can also provide an optional pinlist parameter at the end of the constructor arguments.

#

No, I take that back, that isn't defined for the Uno.

#

On AVR, at a quick glance it looks like the use of particular PORT pins is hard-coded because they all have to be on the same GPIO port.

south flare Apr 25, 2020, 11:02 PM

#

hhmm, yeah I see what you mean. Should I just add a modifier to the .h file then to allow me to modify the pins through the sketch? Since the ESP32 isn't defined, I still don't see where the 6 RGB pins are defined in the sketch

#

AH

#

So no way to get an interrupt for a button working with the matrix running

#

at least on UNO

cedar mountain Apr 25, 2020, 11:03 PM

#

That I don't know, I'm afraid.

south flare Apr 25, 2020, 11:03 PM

#

Hhmm ok. Well thanks for the help. Ill go routing around the web and see what else I can find.

onyx edge Apr 26, 2020, 10:09 AM

#

Hi, I got trouble turning on moisture sensor via digital output

#

whenever I connect sensor directly to 5v it works fine, but whenever I try turning it on with digitalWrite(x,HIGH); nothing happens

#

I'm using arduino nano

#

plugging into different digital pin solved the problem 😦

onyx edge Apr 26, 2020, 12:18 PM

#

I'm trying to read data from moisture sensor on Nano, by activating it via digitalWrite, but the sensor led does not light up(on Comparator) and the analog data I receive is 4 times lower comparing to sensors that are connected directly to Nano's 5V

cyan jasper Apr 26, 2020, 12:38 PM

#

Uhm are you sure 40 mA is enough for moisture sensor?

elder hare Apr 26, 2020, 4:56 PM

#

im rewriting my FastLED class and im getting an error her why? (keep in mind im still learning about classes and how they work)

sketch
https://privatebin.net/?7143f64649a9eeca#4w2TaKFWVNASQ98wn6J4Fkt12dw4tURNGayXme2tRduS

error
https://privatebin.net/?a942eec97b4bde12#AnBATCeoyGzJ5Bb6LL5ptDz9ccv2hQN48kSwx6NSMGMc

cedar mountain Apr 26, 2020, 5:15 PM

#

(Those links come up as blank for me for some reason.)

elder hare Apr 26, 2020, 5:16 PM

#

that is weird :S

#

@cedar mountain i updated the links

#

check i they work

cedar mountain Apr 26, 2020, 5:25 PM

#

Yep, it does. A static function is associated with the class itself, not a particular instantiated object, so it won't necessarily have constructed any of the class variables.

#

(Also you have a == versus = issue, but it's not causing this particular error.)

hollow epoch Apr 26, 2020, 5:28 PM

#

is there a shield compatible with this motor?

#

https://www.servocity.com/118-rpm-hd-premium-planetary-gear-motor-w-encoder

118 RPM HD Premium Planetary Gear Motor w/Encoder

#

how do i control this motor with an arduino?

elder hare Apr 26, 2020, 5:39 PM

#

@cedar mountain so what i can't have that inside the class?

cyan jasper Apr 26, 2020, 5:46 PM

#

Depends on torque and voltage you want to run it at @hollow epoch

#

That's a weird description for motor though it doesn't specify power

#

But sth around 5 to 10 amp 12v driver would be good

cedar mountain Apr 26, 2020, 5:55 PM

#

@elder hare You just want to remove the static qualifier from Increment(). A static function would be called like MYFASTLED.SETUP(), on the class itself for things which are like universal initialization, whereas for non-static functions, they're called like

myleds.Increment(1);```on a particular instance of the class, which would have a particular array to manipulate.

#

Or alternately you could add static to the ARRAY_STRIP_SETTING declaration so it belongs to the class itself, since this is sort of a singleton instance pattern anyway.

sinful mountain Apr 26, 2020, 7:15 PM

#

@sinful mountain I'm hoping for a Feather board eventually. Have you found these BLE and BluetoothSerial examples? https://github.com/espressif/arduino-esp32/tree/master/libraries
@safe shell I have not seen those, but I don't do any Arduino work.

onyx edge Apr 26, 2020, 8:47 PM

#

Uhm are you sure 40 mA is enough for moisture sensor?
@cyan jasper Operating Current: 5mA

cyan jasper Apr 26, 2020, 8:48 PM

#

IDK i was shooting from hip man

stark mist Apr 27, 2020, 5:24 AM

#

hello, does anyone have a good guide on how to pick an opto coupler and calculate required resistors for interfacing a noisy 12-14v signal to a 3.3v arduino?

cedar mountain Apr 27, 2020, 5:54 AM

#

The resistors would want to be in about a 4:13 ratio to bring 14V down to 3.3V. So maybe like 3.9k and 13k from the standard 5% resistor choices.

cyan jasper Apr 27, 2020, 7:21 AM

#

@stark mist
I wanted to send link but on mobile Google doesn't play well but you could search reading optocoupler data sheets and vishay has some decent document (pdf) on it

elder hare Apr 27, 2020, 10:29 AM

#

@cedar mountain what am i doing wrong here?

sketch (note line 62)
https://privatebin.net/?10d9c9f46b45ad08#3Sjz9YqAsqV5Zoce77JAgLF2Ds78rA1tppyMZyMWTvqy

then in my other file im including this class and trying to do this

MYFASTLED::SetLEDBrightness(doc["Brightness"]);

Error
https://privatebin.net/?4ae6be5eda480a02#FbvA2W14RTsmiiLjDTdT8vxcmbTxWG2YnoxHHZJT4Zng

elder hare Apr 27, 2020, 10:59 AM

#

?

cyan jasper Apr 27, 2020, 11:09 AM

#

could you try making it equal to a number or 0 in 26th line? @elder hare

#

lemme know if that works

elder hare Apr 27, 2020, 11:23 AM

#

@cyan jasper then i get this

MyFastLED.h:26:34: error: ISO C++ forbids in-class initialization of non-const static member 'MYFASTLED::LEDBrightness'

       static int LEDBrightness = 0;

                                  ^

exit status 1
ISO C++ forbids in-class initialization of non-const static member 'MYFASTLED::LEDBrightness'

cyan jasper Apr 27, 2020, 11:24 AM

#

Hmm I got nothing sorry🙁

elder hare Apr 27, 2020, 11:26 AM

#

thanks anyway :/

elder hare Apr 27, 2020, 1:12 PM

#

ok so i fixed the first error

#

i was told to add

int MYFASTLED::LEDBrightness = 0;

after class definition and it worked 🙂

#

but now i have another problem as i need todo this for "ARRAY_STRIP_SETTING"

#

here is the updated sketch

#

https://privatebin.net/?cd1e3a3a076fc6b8#63Ah8BGhD1fTgyqVgttDkAXg7MQ42ucDj4F7cT6XUgA9

#

trying to use the function on line 63 outside the class gives errors aswell and im unsure how to fix it :S

static void SetActivePattern (int Pat) { ARRAY_STRIP_SETTING[0].ActivePattern = Pat; }

#

@north stream you have any clue? 🙂

north stream Apr 27, 2020, 1:19 PM

#

@stark mist Optocouplers are fairly easy to use, and there are some logic ones available as well. The input side is basically just an infrared LED, so you'd calculate the resistor similarly to the way you'd do so for an ordinary indicator LED.

#

@elder hare You need to do what? Yet again, you say "gives errors" and don't tell us what the error messages are: without that information, trying to figure out what's going on involves either installing all the libraries and your code and attempting to build it, or reading all the code and trying to figure out what it's trying to do, what the compiler would do with it, and where that would go off the rails. Either of those is a fair amount of effort.

elder hare Apr 27, 2020, 1:25 PM

#

same error as above

#

this is the sketch
https://privatebin.net/?cd1e3a3a076fc6b8#63Ah8BGhD1fTgyqVgttDkAXg7MQ42ucDj4F7cT6XUgA9

trying to use the function outside the class

MYFASTLED::SetActivePattern(1);

but get this error


c:/users/mythical force/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-3-20ed2b9/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: sketch\Main_Code.ino.cpp.o: in function `ArduinoJson6150_0000010::enable_if<ArduinoJson6150_0000010::IsWriteableString<String>::value, String>::type ArduinoJson6150_0000010::variantAs<String>(ArduinoJson6150_0000010::VariantData const*)':

C:\Users\Mythical Force\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantAsImpl.hpp:40: undefined reference to `MYFASTLED::ARRAY_STRIP_SETTING'

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).

#

now trying todo the same as with the LEDBrightness after class defenition

int MYFASTLED::LEDBrightness = 0;

im not sure as to what type to use i've tried

record_type MYFASTLED::ARRAY_STRIP_SETTING[NUM_STRIP];
struct MYFASTLED::ARRAY_STRIP_SETTING[NUM_STRIP];
typedef struct MYFASTLED::ARRAY_STRIP_SETTING[NUM_STRIP];

pine bramble Apr 27, 2020, 1:28 PM

#

Hey guys I bought the adafruit music maker shield for arduino, but I ran in some issues while trying to play music out of the audio output. There where simply not one sound. with the headphones it worked perfectly

fossil sparrow Apr 27, 2020, 1:40 PM

#

I am using an Arduino board to "puppet" a controller from a Bionaire window fan and I an having trouble determining the values of the LEDs

#

📎 IMG_20200427_063954.jpg 📎 IMG_20200427_063958.jpg

#

Here's what I've figured out so far

#

📎 IMG_20200427_064112.jpg

#

The LEDs are connected to a hot anode and a multiplexed cathode

#

When the LED is on, the cathode gets pulled to ground

#

When the LED is off, the cathode is left in a floating state

#

I am trying to detect the state of the LED programmatically

#

However, I only get garbage inputs

📎 Screen_Shot_2020-04-27_at_06.43.23.png

pine bramble Apr 27, 2020, 1:43 PM

#

I have no sound output on the adafruit music maker shield for arduino. But only on the ports for speakers the port for the headphones is working could someone help me pls. Maby <@&617066238840930324>

fossil sparrow Apr 27, 2020, 1:43 PM

#

📎 IMG_20200427_064346.jpg

#

I put 1M ohm pull-up resistors on each of the LEDs but that changed nothing

north stream Apr 27, 2020, 1:48 PM

#

@elder hare Sounds like you're trying to set a variable you don't have permission to set. Perhaps the class offers a method (a "setter") to do it for you?

#

@pine bramble So it works with headphones but not the speaker outputs?

pine bramble Apr 27, 2020, 1:49 PM

#

jes thats the problem is there maby a problem on the shield or are my speaker just broken?

north stream Apr 27, 2020, 1:49 PM

#

@fossil sparrow That's going to happen with multiplexed LEDs, as the data is changing continuously, and is only valid for certain combinations of signals.

fossil sparrow Apr 27, 2020, 1:49 PM

#

I understand that the LEDs won't have a consistent output over time

#

Would I be able to smooth it out somehow

#

Either by taking a large number of samples and getting the average value, or with some sort of electronics?

#

The problem is that even the LEDs that are currently off give me noise

#

Even if the multiplexer is off (it gets disabled with the specific LED bank), certain LEDs give me noise on the input pin, while others give me zeros

#

All the LEDs are currently off

📎 Screen_Shot_2020-04-27_at_06.52.04.png

north stream Apr 27, 2020, 1:52 PM

#

You can't really do smoothing, you need to do synchronized sampling. The LEDs are controlled by two separate signals, so just looking at one signal will only give garbage

#

@pine bramble I'd try some other speakers first. The only way to find out what's really wrong is to systematically narrow it down.

fossil sparrow Apr 27, 2020, 1:53 PM

#

I'll upload my code

#

if that would help anything

pine bramble Apr 27, 2020, 1:54 PM

#

So I tested my speaker and its working perfectly

fossil sparrow Apr 27, 2020, 1:55 PM

#

https://gist.github.com/dkudriavtsev/cab60fddba335710e241e7da02934c42

#

it's uncommented garbage that I ported from an ESP32

pine bramble Apr 27, 2020, 1:56 PM

#

and I tested it with another speaker wasn't working either

fossil sparrow Apr 27, 2020, 2:00 PM

#

I'm honestly considering removing the controller from the controller board and replacing it with something programmable that emits the proper control signals for the relay board

#

@north stream What do you mean by "two separate signals"?

#

this is interesting, I increased the sample rate and got this

📎 Screen_Shot_2020-04-27_at_07.24.52.png

#

maybe now I can measure the pulse width

long silo Apr 27, 2020, 2:26 PM

#

HI, I'm new to arduino and I don't know where to start I hope you guy's have tips for me?

fossil sparrow Apr 27, 2020, 2:26 PM

#

what do you want to do?

long silo Apr 27, 2020, 2:26 PM

#

build stuff

fossil sparrow Apr 27, 2020, 2:27 PM

#

do you have any ideas for projects?

long silo Apr 27, 2020, 2:27 PM

#

yes just a simple thing

#

so

#

whit an IR remote sending a signal and making a led shine

fossil sparrow Apr 27, 2020, 3:00 PM

#

There's a brightness button on the thing that throws off the pulse widths ://///

#

even when the LEDs are off, some of them are still being pulsed (?)

north stream Apr 27, 2020, 3:01 PM

#

When you said "hot anode", I assumed you mean "common anode". To light multiplexed LEDs, the controller cycles through the groups by turning on the anodes one at a time while activating the cathodes for the LEDs in that group that are to be lit. Then it turns off those anodes, turns on the next anodes, along with the cathodes for that group.

#

So you'll see complicated waveforms for both the anode and cathode lines. To determine whether a particular LED is to be lit, you have to sample when both its anode and cathode lines are activated at the same time.

fossil sparrow Apr 27, 2020, 3:02 PM

#

I just figured out that I was wrong when I said they were multiplexed

#

They are not multiplexed, they are PWM-lit

#

and the different LEDs have different offsets for the PWM

#

The anodes are just tied to +5V

north stream Apr 27, 2020, 3:03 PM

#

But you said you saw activity for LEDs that were off, which seems odd.

fossil sparrow Apr 27, 2020, 3:03 PM

#

yeah

📎 Screen_Shot_2020-04-27_at_08.03.01.png

#

this is when LED 1 is on (first line is LED 1)

#

This is when all of the LEDs are off, except the 7-segment display which I am not touching

📎 Screen_Shot_2020-04-27_at_08.03.35.png

north stream Apr 27, 2020, 3:03 PM

#

It is easier if they're not multiplexed, because you can use a sampling approach or averaging circuitry to determine if they're on.

fossil sparrow Apr 27, 2020, 3:04 PM

#

However, the anode is still hot

north stream Apr 27, 2020, 3:04 PM

#

Or peak-hold type circuitry, perhaps.

fossil sparrow Apr 27, 2020, 3:04 PM

#

I am planning to integrate this into the case of the window fan, so the less parts the better

north stream Apr 27, 2020, 3:05 PM

#

Then an interrupt driven or sampling approach is probably the way to go (I did a little of each in one recent project)

fossil sparrow Apr 27, 2020, 3:05 PM

#

Ok

#

I found that Arduino has built-in supports for measuring pulse width

north stream Apr 27, 2020, 3:06 PM

#

Good point, that should be useful

fossil sparrow Apr 27, 2020, 3:06 PM

#

the problem is that it's impossible to distinguish the pulse width at the lowest brightness setting and when the LEDs are off

#

I still have no idea how that works

#

The anode is still tied to +5V

#

I am also going to start using the internal pullups of the ATMega instead of the external pullups, it should have the same result anyway

north stream Apr 27, 2020, 3:08 PM

#

With LEDs connected, you shouldn't need pullups (unless I'm missing something)

#

Maybe "off" and "minimum brightness" are implemented the same way?

fossil sparrow Apr 27, 2020, 3:15 PM

#

No, because you can see the LEDs when they're on minimum brightness, but not when they're off

#

The LEDs are being disconnected by floating the pin

#

so it returns garbage as typical for a floating pin

pine bramble Apr 27, 2020, 3:43 PM

#

@pine bramble You need speakers with an amplifier (powered speakers) I think for that shield.

#

You might want to check if you have the version without the 3W amp. PRODUCT ID: 1790

north stream Apr 27, 2020, 3:50 PM

#

A floating pin should get pulled to 5V by the LED, same as an off one. I doubt the drivers have active pullups anyway, they're probably open drain.

fossil sparrow Apr 27, 2020, 3:59 PM

#

wait no what am I saying

#

they're being pulled to ground but I was measuring the PWM'd pins with my multimeter

stark mist Apr 27, 2020, 4:53 PM

#

@stark mist
I wanted to send link but on mobile Google doesn't play well but you could search reading optocoupler data sheets and vishay has some decent document (pdf) on it
@cyan jasper Thanks will do I was trying to read through the data sheets but there was some nomenclature there I didn't quite understand, this will be very useful thanks

cyan jasper Apr 27, 2020, 4:58 PM

#

In future try reading application manual or something similar for that or that type chip. (I used to read ti's ones for fun) @stark mist

stark mist Apr 27, 2020, 4:59 PM

#

@cyan jasper thanks again I'm just reading through this now

#

https://www.vishay.com/docs/84256/useoptocouplerdatasheet.pdf

#

essentially I have a vehicle power system that is very noisy and I want to read the pulses from the tacho line and count them on my arduino so I can push that to my data logger

#

a lot of people seemed to use schmitt triggers but I read some posts about people using optocouplers and it seems like a very elegant solution and less components

north stream Apr 27, 2020, 5:03 PM

#

@fossil sparrow A multimeter (other than a fancy high crest factor one) will be confused by PWM, but you had printouts of digital reads. In any case, if it's pulled up (doubtful, but possible), it should read 5V. If it's open circuited, it should still read 5V. If it's pulled down, it should read near 0V.

fossil sparrow Apr 27, 2020, 5:03 PM

#

This is the cheapest digital multimeter I could find at Fry's so it is definitely confused

#

It's being pulled down

north stream Apr 27, 2020, 5:07 PM

#

There should be a difference between "low brightness" and "off".

fossil sparrow Apr 27, 2020, 5:07 PM

#

The digital chart looks the same ;-;

#

I need to get my oscilloscope

north stream Apr 27, 2020, 5:08 PM

#

Yes, if you have one available to you, now would be the time to deploy it.

fossil sparrow Apr 27, 2020, 5:08 PM

#

I have a Tektronix 2246 sitting somewhere

stark mist Apr 27, 2020, 5:12 PM

#

if its a pwm over dc wouldnt a cheap volt meter set to ac show a good value?

#

I used one a few days back to read my tacho pulse on my motorcycle

#

it doesnt give pulse widths or anything but you can see the value

fossil sparrow Apr 27, 2020, 5:13 PM

#

I actually tried this

#

It gave 5.80V

stark mist Apr 27, 2020, 5:14 PM

#

the variance in pulse width should change that value I think

#

so on my bike increasing rpm changed the amount of AC volts the volt meter showed

north stream Apr 27, 2020, 7:37 PM

#

Depends a lot on how the meter works. Some will average things, some will take whatever the value is at any given instant (which will vary all over the place), some will take the DC component, some will take the AC component, some will take a combination, some will just pay attention to certain harmonics, etc.

fiery lichen Apr 27, 2020, 7:43 PM

#

So is there a reason the seesaw board would be recognized during the blink example and then after powering down usb and plugging it back in, the micro fails to find the seesaw board? The green light is still on and no wires have moved.
Is the seesaw board sensitive to powering down and back up of the micro? I now have Two seesaw boards that fail to be detected after working just fine a minute earlier

#

📎 image0.jpg

safe shell Apr 27, 2020, 7:45 PM

#

@fiery lichen Does the Seesaw board get reset when the micro gets reset or power-cycled (is it getting power from the same USB)?

fiery lichen Apr 27, 2020, 7:47 PM

#

Yes

#

📎 image0.jpg

#

I have a big project and I can’t have seesaw boards failing at random. Wish I knew why

#

📎 image0.jpg

north stream Apr 27, 2020, 7:50 PM

#

They're I2C, right? You could try a simple soft I2C test program to see what they are and are not doing.

fiery lichen Apr 27, 2020, 7:51 PM

#

Isn’t that what the example is?

north stream Apr 27, 2020, 7:52 PM

#

No, the example uses a big complicated wrapper library on top of hardware I2C so it's difficult to get any visibility into what's going on at a low level. Just iterating through some I2C signals in software and monitoring what the response is might shed some light on what's happening.

fiery lichen Apr 27, 2020, 7:53 PM

#

That’s definitely outside my familiarity zone

#

I guess that’s why I bought 8 of them just in case :/

#

New seesaw board with wiring unchanged works fine

north stream Apr 27, 2020, 8:09 PM

#

That does make it sound like they're getting zapped somehow

fiery lichen Apr 27, 2020, 8:26 PM

#

Hmmmm

#

If I power it off a wall brick 5v 8a, is there a way to protect circuits from a surge when you first plug it in? Do I need to?

fiery lichen Apr 27, 2020, 9:41 PM

#

What about if I supply power to the see saw and other boards from the voltage regulator on the micro vs the usb pin. Would that help protect things at all?

fossil sparrow Apr 28, 2020, 11:20 AM

#

@north stream Here's what the PWM signal looks like for an enabled LED at 2/3 brightness. Note the blips at the top and bottom

📎 IMG_20200428_041954.jpg

#

Looks like with every cycle, the signal briefly (about 10us) goes to 5V, then 0V, then to the intended value.

#

This is messing with my cycle length detection

north stream Apr 28, 2020, 1:19 PM

#

Hmm, that's a much more interesting waveform than I expected. It looks like the LEDs are being controlled by a current regulating driver of some sort.

fossil sparrow Apr 28, 2020, 1:50 PM

#

wait, it is multiplexed

#

📎 IMG_20200428_065042.jpg

#

sorry about the rotated picture

#

but the top is the cathode, the bottom is the anode

#

this is with the LED on

#

now if I turn the brightness to 2/3

#

this is the three brightness settings

#

📎 IMG_20200428_065248.jpg 📎 IMG_20200428_065249.jpg 📎 IMG_20200428_065250.jpg

#

so you can see that it's just being PWM'd down

#

and since I can detect when the cathode is off, I can sync my detection to the pulses

#

so I don't need to measure pulse lengths or anything, I can just basically pattern-match based on the binary input

#

here's a better look at it

#

📎 IMG_20200428_065534.jpg

#

wait

#

the only measurements here that actually matter are the ones that happen when the cathode is at ground

#

the cathode is shared across all of the LEDs I'm snooping

#

so I can just wait until the cathode is at ground and get all the LED states at the same time (???)

#

oh so that's how it works, the set of LEDs have a common cathode

#

then the multiplexing circuitry pulls down the cathode for the specific set of LEDs that are currently on

#

and pulls up the anode for the specific LED in the set

#

this was definitely a learning experience lmao

#

so here's all the code I actually need:

int test(int pin) {
  while (digitalRead(pin_row) != LOW) { ; }
  return digitalRead(pin);
}

#

I added a timeout in case all of the LEDs were off:

int test(int pin) {
  unsigned long int cur_time = millis();
  while (digitalRead(pin_row) != LOW) { if (millis() - cur_time >= 10) return LOW; }
  return digitalRead(pin);
}

#

It works and now gives perfect results, thank you for the help!

#

now it's time to make this arduino act as an i2c device so I can talk to it through my esp32 because I can't get a level shifter and this is my only option

#

i might need to pull out the atmega328p and connect it standalone for space reasons

#

actually i already have an atmega328p programmed to work standalone, i might just use that

cyan jasper Apr 28, 2020, 3:06 PM

#

Have you considered building a level shifter? It's only 1 mosfet and 2 resistors? @fossil sparrow

fossil sparrow Apr 28, 2020, 3:06 PM

#

I don't have any mosfets

#

I don't have nearly enough electronic parts, really

cyan jasper Apr 28, 2020, 3:07 PM

#

Npn transistors?

fossil sparrow Apr 28, 2020, 3:07 PM

#

I only have three loose NPN transistors that already are used in one project

cyan jasper Apr 28, 2020, 3:07 PM

#

Okay just seems wasteful and feels like adding point of failure

fossil sparrow Apr 28, 2020, 4:49 PM

#

I can't think of any other ways to do this with the parts I have

#

@cyan jasper

karmic stream Apr 28, 2020, 7:14 PM

#

I have got some rather weird behavior with a static array of function pointers on the ATmega328p. when I call the pointed to function, the normal behavior is expected to be that an LED blinks once. some of those functions have the behavior of being called an infinite amount of times. The exact positions of those incorrectly behaving functions in the array are: Index 1 5 18 21 24
This is the particular code that calls the pointed to functions: https://github.com/jxsl13/lpc1768_blinky_example/blob/a07bc577c1c6049e9821a541c3074348974b820e/src/controllers/atmega328p/InterruptVectorTable.cpp#L288. it is being called form the src/main.cpp

valid lily Apr 28, 2020, 8:26 PM

#

hey guys, so I'm writing a program that uses the serial monitor to interact with the user. However, I want to be collecting data at the same time as I'm running the program but without using the serial monitor, any help?

north stream Apr 28, 2020, 9:25 PM

#

If "interacting with the user" is one way (providing updates), then you can use TX for that and RX to collect data. However, if you're using both TX and RX for the serial monitor, you'll need to either use softserial or one of the Arduinos with another serial port to collect serial data.

cyan jasper Apr 28, 2020, 9:25 PM

#

slightly related isn't uart send ack after every bit

#

so its kind of not full dublex?

north stream Apr 28, 2020, 9:28 PM

#

No, UARTs don't automatically acknowledge (there are other protocols that do, but not asynchronous serial)

pine bramble Apr 28, 2020, 10:55 PM

#

Hi
I'm trying to build a 3x3x3 LED cube
I got it to work but 6 of the 27 LEDS are not turning on. I replaced then but no luck 😦 . What should I do?
Please help

north stream Apr 29, 2020, 12:43 AM

#

Probably not a driver problem (which would probably affect 9 LEDs at a time) so loose connection?

elder hare Apr 29, 2020, 9:41 AM

#

What type should DATA_PIN be to work? :S

      void SETUP(DATA_PIN) {
        FastLED.addLeds<WS2812B, DATA_PIN, GRB>(Strip, NUM_LEDS_PER_STRIP).setCorrection(TypicalLEDStrip);
      }

eager dune Apr 29, 2020, 11:18 AM

#

Hello, can I get help with this. some one sent me this question and I'm not experienced with Arduino

📎 Annotation_2020-04-29_151327.png

north stream Apr 29, 2020, 12:31 PM

#

@elder hare I'm guessing an integer, to specify a pin?

#

@eager dune Which part are you having trouble with? Have you installed the Arduino software?

eager dune Apr 29, 2020, 12:32 PM

#

I'm trying to learing how to write this code

#

because I am not experinced with C++ or arduino

#

I'm just learning unity and C#

north stream Apr 29, 2020, 12:34 PM

#

If you go to File -> Examples -> Basics -> AnalogReadSerial, there's some example code for writing data to the serial port

elder hare Apr 29, 2020, 12:35 PM

#

@north stream i did try int :/ no go

north stream Apr 29, 2020, 12:35 PM

#

As ever, saying "no go" doesn't help us help you, you have to tell us HOW it didn't work. I haven't used that library in years and don't know all its ins and outs.

elder hare Apr 29, 2020, 1:47 PM

#

i was out shopping! that's why i gave you a short answer!

fossil sparrow Apr 29, 2020, 1:55 PM

#

I'm having trouble with i2c

#

Whenever I send a message to my board, it stops responding

#

Here's my code: https://gist.github.com/dkudriavtsev/b439cb33f585e52861ab0bfd6b83831e

Gist

receiver.ino

GitHub Gist: instantly share code, notes, and snippets.

#

and here's the output I get:

init
init done
as

north stream Apr 29, 2020, 2:23 PM

#

I don't think your problem is with i2c, I think it's with control flow. Looks like your program does one thing then loops doing nothing forever.

fossil sparrow Apr 29, 2020, 2:36 PM

#

@north stream It registers the function receiveEvent as a receive handler for the i2c bus, then loops waiting to receive a message. When it receives one, receiveEvent starts executing, manages to print as, then stops for some reason

north stream Apr 29, 2020, 2:54 PM

#

It could be that the event handler is interrupt driven, and that routine is too long to run in an interrupt context. Maybe have it just set a flag, and have loop() poll the flag?

elder hare Apr 29, 2020, 3:19 PM

#

@north stream so im back at the computer! so "no go" means this ->

https://paste.pythondiscord.com/egebuvumur.py

Error:
https://paste.pythondiscord.com/eyiwigiteg.py

fossil sparrow Apr 29, 2020, 3:21 PM

#

@north stream I'll try it, thanks for the suggestion

cedar mountain Apr 29, 2020, 3:24 PM

#

It looks like you can't provide the pin number as a function parameter at run-time. It should be like a #define constant instead.

elder hare Apr 29, 2020, 3:32 PM

#

so that's not possible

#

-.-

cyan jasper Apr 29, 2020, 3:58 PM

#

Setup can't take any parameters. Functions that happen on their own can't take parameters

elder hare Apr 29, 2020, 3:58 PM

#

will this work? :S

📎 unknown.png

cedar mountain Apr 29, 2020, 4:01 PM

#

What exactly are you trying to accomplish? That seems a bit needlessly convoluted, but everything ends up hard-coded anyway.

elder hare Apr 29, 2020, 4:04 PM

#

i have a ESP8266 with 8 strips to 8 diffferent pins 🙂 and i've made a class for the FastLED library with patterns and everything 🙂 and i want to run multiple instances/objects or whatever it's called for each strip, so then i would need to be able to set the PIN

cyan jasper Apr 29, 2020, 4:06 PM

#

That works but what's wrong with define DATA_PIN 9 define DataPin 9

#

That should be more optimised too

#

Because how compiler works

elder hare Apr 29, 2020, 4:08 PM

#

i can only define 1 pin :S

cyan jasper Apr 29, 2020, 4:09 PM

#

DataPin1 , DataPin2...

#

And on constructor you input different definitions which gets encapsulated inside the class

#

I really think you're overcomplicating this

elder hare Apr 29, 2020, 4:15 PM

#

maybe i am but i've never done this befor

cyan jasper Apr 29, 2020, 4:16 PM

#

I read the blog of the guy who wrote switch case of one of the first C compiler (can't remember neither guy's name or compiler's name) he tried to optimize it so much that noone else touched switch case again because it was too complicated, and at some point cascaded if s worked faster because ppl kept optimising

elder hare Apr 29, 2020, 4:19 PM

#

@cyan jasper how would you do it then?

cyan jasper Apr 29, 2020, 4:21 PM

#

Uhm really dumb way (dumb is not bad. Dumb is good) is create 8 different define data pin and clocks

#

(if possible run every instance with same clock pin)

#

Or I create an int array and feed numbers to myfastled and inside my fast led constructor construct a fastled

#

Though 2nd one requires a bit of pointer use

#

Or not I'm not sure

#

That could depend how much you want to optimised it too

elder hare Apr 29, 2020, 4:25 PM

#

well working and not broken would be nice 😛

cyan jasper Apr 29, 2020, 4:27 PM

#

Both should work well

#

Idk if I explained well but I got something to do right nw

karmic stream Apr 29, 2020, 6:13 PM

#

I have got some rather weird behavior with a static array of function pointers on the ATmega328p. when I call the pointed to function, the normal behavior is expected to be that an LED blinks once. some of those functions have the behavior of being called an infinite amount of times. The exact positions of those incorrectly behaving functions in the array are: Index 1 5 18 21 24
This is the particular code that calls the pointed to functions: https://github.com/jxsl13/lpc1768_blinky_example/blob/a07bc577c1c6049e9821a541c3074348974b820e/src/controllers/atmega328p/InterruptVectorTable.cpp#L288. it is being called form the src/main.cpp
In regard to this, after calling the function pointer the controller returns at the incorrect position. the function pointer at that same position in the array is also called in the ISR. but calling the function outside the ISR returns after the function call inside the ISR, seemingly.

#

https://community.platformio.org/uploads/default/original/2X/d/d83e47b3fcd7155ff0ccc0ce9afaf6aa31a24428.png

#

📎 Anmerkung_2020-04-29_201602.png

#

second screenshot: where the call happens, first screenshot: after which function call the subroutine call returns.

#

(commenting out the function call in the ISR actually results in the correct behavior) this is not the wanted solution, tho!

near delta Apr 29, 2020, 6:21 PM

#

Do you know if i can sell product arduino based?
btw can I use for example adafruit libraries in my products?
Any recommendation about where to get CE certifications to launch an IOT product based on Raspberry pi, Arduino or both is possible in Europe?

cyan jasper Apr 29, 2020, 6:34 PM

#

(someone is using atmel studio 🙂 )

elder hare Apr 29, 2020, 6:59 PM

#

@cyan jasper when you have time could you show me a quick example?

fossil sparrow Apr 29, 2020, 7:03 PM

#

It could be that the event handler is interrupt driven, and that routine is too long to run in an interrupt context. Maybe have it just set a flag, and have loop() poll the flag?
@north stream This worked, thank you!

karmic stream Apr 29, 2020, 7:57 PM

#

does anyone know what compiler flags are used by the arduino ide?

cyan jasper Apr 29, 2020, 8:31 PM

#

does anyone know what compiler flags are used by the arduino ide?
@karmic stream you can probably extract them from here
https://gcc.gnu.org/onlinedocs/gcc/AVR-Options.html

AVR Options (Using the GNU Compiler Collection (GCC))

karmic stream Apr 29, 2020, 8:32 PM

#

thanks

cyan jasper Apr 29, 2020, 8:32 PM

#

also this @karmic stream
https://arduino.github.io/arduino-cli/platform-specification/

Platform specification - Arduino CLI

Arduino Command Line Interface

north stream Apr 29, 2020, 10:58 PM

#

You can also check "show verbose output during compilation" in the preferences, and it will put all the commands it uses, complete with options, in the status window, where you can copy/paste them to do whatever you like (I'll do this if I want to modify the options to, say, get an assembly listing).

📎 screenshot_659.png

stark mist Apr 30, 2020, 12:37 AM

#

has anyone had experience of integrating the sparkfun gps library into sketch running on the adafruit clue?

#

Also inside the arduino ide I'm having trouble getting my serial logger window to work

#

quite often it outputs nothing, although I think this might be something with the Clue board as if I connect realterm I get the same issue

#

I'm downloading updates now to see if that will help.

#

I'm a try a different cable

#


Failed to upgrade target. Error is: Serial port could not be opened on COM3. Reason: Cannot configure port, something went wrong. Original message: OSError(22, 'The semaphore timeout period has expired.', None, 121)
Traceback (most recent call last):
  File "nordicsemi\dfu\dfu_transport_serial.py", line 113, in open
  File "site-packages\serial\serialwin32.py", line 31, in __init__
  File "site-packages\serial\serialutil.py", line 240, in __init__
  File "site-packages\serial\serialwin32.py", line 78, in open
  File "site-packages\serial\serialwin32.py", line 222, in _reconfigure_port
serial.serialutil.SerialException: Cannot configure port, something went wrong. Original message: OSError(22, 'The semaphore timeout period has expired.', None, 121)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "nordicsemi\__main__.py", line 294, in serial
  File "nordicsemi\dfu\dfu.py", line 235, in dfu_send_images
  File "nordicsemi\dfu\dfu.py", line 157, in _dfu_send_image
  File "nordicsemi\dfu\dfu_transport_serial.py", line 115, in open
nordicsemi.exceptions.NordicSemiException: Serial port could not be opened on COM3. Reason: Cannot configure port, something went wrong. Original message: OSError(22, 'The semaphore timeout period has expired.', None, 121)

Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
    Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
Error while setting serial port parameters: 115,200 N 8 1```

#

hmm

#

anyone have any ideas on this?

stark mist Apr 30, 2020, 1:13 AM

#

does anyone know how to put the clue into dfu mode?

#

nvrm I think I got it

#

scrap that I dont got it, still getting the same error after updating libraries and board

#

actually I'm good

#

its all back working again

#

Okay I'm back to my previous original issue before I updated the board

#


const int baudrate = 115200;

void setup()
{
  Serial.begin (baudrate);
  while ( !Serial ) delay(10); 

  Serial.println("Serial Echo demo");
  Serial.print("Badurate : ");
  Serial.println(baudrate);
}

void loop()
{ 
  if ( Serial.available() )
  {
    Serial.write( Serial.read() );
  }
}```

#

this works

#

but when I plug in my qwiic gps break out board and include its libraries

#

the board stops responding and doesn't seem to get past opening its own serial port

#

#include <SparkFun_Ublox_Arduino_Library.h>
SFE_UBLOX_GPS myGPS;

const int baudrate = 115200;
void setup()
{
  Serial.begin (baudrate);
  while ( !Serial ) delay(10);  

  Serial.println("Serial Echo demo");
  Serial.print("Badurate : ");
  Serial.println(baudrate);

  if (myGPS.begin() == false)
  {
    Serial.println(F("Ublox GPS not detected at default I2C address."));
  }
}

void loop()
{ 
  if ( Serial.available() )
  {
    Serial.write( Serial.read() );
  }
}```

#

with the first program but the board plugged in the serial echo works but with the second program the serial echo does not work

#

commenting out the mygps.begin() call gets it back up and running so its not a library issue specifically but something is causing the clue to die when I try to open the i2c connection

#

I wrote an i2c scanner so the first run is with the board plugged in and the second is the board unplugged

#

I2C device found at address 0x1C  !
I2C device found at address 0x21  !
I2C device found at address 0x39  !
I2C device found at address 0x44  !
I2C device found at address 0x6A  !
I2C device found at address 0x77  !
I2C device found at address 0x80  !
I2C device found at address 0x9C  !
I2C device found at address 0xA1  !
I2C device found at address 0xB9  !
I2C device found at address 0xC4  !
I2C device found at address 0xEA  !
I2C device found at address 0xF7  !
done

Serial Echo demo
Badurate : 115200
Scanning...
I2C device found at address 0x1C  !
I2C device found at address 0x39  !
I2C device found at address 0x44  !
I2C device found at address 0x6A  !
I2C device found at address 0x77  !
I2C device found at address 0x80  !
I2C device found at address 0x9C  !
I2C device found at address 0xB9  !
I2C device found at address 0xC4  !
I2C device found at address 0xEA  !
I2C device found at address 0xF7  !
done```

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which to me suggests that their lib should have begin called with 0xA1 or 0x21

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the default I think in their library looks like 0x42

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ya

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okay this worked I think its on address 0xA1

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the echo is working with the board plugged in and the api initialized on 0xA1

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yay for rubber ducking

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getting nmea sentences correctly

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phew

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honestly thought I had bricked the clue for a few moments earlier

cedar mountain Apr 30, 2020, 2:55 AM

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That should probably be 0x21. I2C addresses are only 7 bits, so the ones you have which are 0x80 or greater are likely just aliases of the lower numbers because the high bit is dropped when sending to the bus.

stark mist Apr 30, 2020, 6:00 AM

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I was reading somewhere that there is an extended 8 bit range for address more recently, I'll try 0x21 and see if it still works thanks for the heads up

stark mist Apr 30, 2020, 6:19 AM

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yep all still working

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thanks

valid lily Apr 30, 2020, 1:17 PM

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anyone here?

bronze ember Apr 30, 2020, 1:29 PM

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yes

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But I am new in this server

wild hedge Apr 30, 2020, 7:13 PM

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Is there a way I can get my Arduino Uno to somehow get a message or smth from a webserver run from an ESP32 camera?

cyan jasper Apr 30, 2020, 9:23 PM

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Wired or wirelessly?

flint smelt Apr 30, 2020, 10:17 PM

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I can't get the STM32CubeProgrammer tool downloaded. Once I get logged into st.com the download link disappears. Am I doing something wrong?

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Re-registered with a different email address and it works now

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Now the software doesn't detect the board but I can see the STM32 BOOTLOADER in the device manager.

karmic stream Apr 30, 2020, 10:59 PM

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atmega328p vs arm cortex-m. it seems that the interrupt behavior is completely different, the avr one, without prior configuration of the interrup source does seem to trigger interrupts directly after the interrupt enable flag has been set. the cortex-m interrupts are seemingly not triggered without any configuration, even when they have been enabled. does anyone have any experience in that regard with those microcontrollers?

cedar mountain Apr 30, 2020, 11:41 PM

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I have some Cortex M experience. Typically there's a distinction between the peripheral generating the interrupt and the NVIC which is dispatching it. So you often have to both tell the peripheral which events should trigger its interrupt output signal, and then enable that interrupt in the NVIC.

cyan jasper May 1, 2020, 1:15 AM

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I don't have arm experience but you need some configuration to do for AVR too

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Only sei() doesn't cut it

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You need to enable interupt source from a register (I don't know if I am remembering this one from Pic but there were two settings one were choosing individual source and one for all external all peripheral etc.)

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And you have to set the state iirc from another register (I don't remember actual name)

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Optionally enabling internal pull up

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But those usually have default values so some people don't bother

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(unless there is some sort of different behavior on arm boards but those types of configurations are pretty basic and probably all of the architectures have it)

karmic stream May 1, 2020, 2:55 AM

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I am asking more about whether avr triggers interrupts that have their default not configured state by simply enabling interrupts globally and setting the interrupt enable flag of one of the interrupts..

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I am kind of simulating an interrupt being triggered with a simple function call. very odd behavior has lead me to assume that like the watchdog(seemingly also visible on the user manual) is directly enabled by setting its interrupt enable flag + sei(). I'm not quite sure, tho, as the controller seemingly does not reset, but infinitely calls the ISR.

cedar mountain May 1, 2020, 4:07 AM

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I'm not sure if it's relevant to what you're doing, but I think the AVR architecture has a separate return-from-interrupt instruction, so there may be weird things happening if you call an ISR as a normal function.

karmic stream May 1, 2020, 2:03 PM

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I'm not calling an ISR as function 😄 thanks for the info.

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I think enabling some interrupts seems to already trigger them.

cyan jasper May 1, 2020, 2:14 PM

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without changing global interrupt flag? what are you doing with your code if you dont mind me asking? really curious (I love love register manupilation 🙂 ) @karmic stream

karmic stream May 1, 2020, 2:18 PM

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all my code does is simply enable the individual interrupt enable flag, enable interrupts globally and call a function pointer from an array of function pointers that is also called when a specific ISR is triggered.

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I had very weird behavior when simply calling a function pointer, which seems not to happen when not enabling the interrupts individually. so I think that enabling interrupts already triggers them.

cyan jasper May 1, 2020, 2:21 PM

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so you call a function inside ISR function?

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thats frowned upon

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A) watchdog reasons
B) this kind of reasons

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when its not doing ISR it retriggers