No RBG Action on a ESP32-S3-DevkitC-1

PlatformIO IDE
1

Upload- debug-serial out work but no joy getting the RGB to work. I added the Neopixel library.

I would appreciate any ideas.

Code:

#include <Adafruit_NeoPixel.h> 

#define PIN 48
#define NUMPIXELS 1

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 1000

void setup () {  
  
  pixels.begin();
  //pixels.setBrightness(0.3);

}

void loop () {

  pixels.clear();

  for(int i=0; i<NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(0, 150, 0));
    pixels.show();
    delay(DELAYVAL);
  }

}
2

Use the builtin function neopixelWrite.
No need for an external library to drive a single RGB led.

platformio.ini:

[env:esp32-s3-devkitc-1]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino

main.cpp:

#include <Arduino.h>

void setup()  {
}

void loop() {
  neopixelWrite(RGB_BUILTIN, 255, 0, 0 );
  delay(1000);
  neopixelWrite(RGB_BUILTIN, 0, 255, 0);
  delay(1000);
  neopixelWrite(RGB_BUILTIN, 0, 0, 255);
  delay(1000);
}

On some DevKits you have to close a solder-bridge.

3

Thanks for the help. You are right, I am able to build your code without the library. Unfortunately no blinkage. It worked when I first powered up the board (default code)

4

Some boards using a different GPIO for the RGB LED.
Check the datasheet of your board. Do you have a link?

5

That was it. :slight_smile: It’s on pin 38 not 48.

Thanks
Rich