Hi. Does someone know how to control onboard RGB LED on ESP32-S3?

Hey I got the same issue with my esp32-s3-wroom-1 (n16r8) module. The solution was to connect the rgb pins [248639920-391c59d1-2ee4-4b46-a206-37a9fcb17587] Then you can use pin 48 to blink the rgb led. I used Fastled library and it works fine.

Its a neopixel LED so use an appropriate library such as; [image] GitHub - adafruit/Adafruit_NeoPixel: Arduino library for controlling... Arduino library for controlling single-wire LED pixels (NeoPixel, WS2812, etc.) - GitHub - adafruit/Adafruit_NeoPixel: Arduino library for controllin…

Thank you. I followed the example. It compiles but the LED doesn't work neither on pi 38 nor 48. #include <Adafruit_NeoPixel.h> #define PIN 48 #define NUMPIXELS 1 Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); #define DELAYVAL 500 void setup () { pixels.begin(); } void…

Select an esp32s3 as your board type. Go to Files->Examples->ESP32->GPIO->BlinkRGB for an example of how to use the onboard RGB LED.

If you use LED_BUILTIN as the LED name, the RGB LED will blink white like a normal LED.

[image] bojan_jurca: It compiles but the LED doesn't work neither on pi 38 nor 48. You don't mention which exact board you have :wink: I found https://esp32s3.com/files/schematic-pros3.pdf which has the RGB LED on pin IO18. Note: I do not know anything about ESP32-S3 so IO18 might well be p…

I thought there may be a problem with PWM on ESP32-S3, which I could also not get working. So I tried this code on ESP32-C3, it works just fine. It really looks like it is a PWM problem after all. #include <Adafruit_NeoPixel.h> #define PIN 8 // ESP32-C3 built-in RGB led #define NUMPIXELS 1 Adafr…

[image] bojan_jurca: It really looks like it is a PWM problem after all. PWM has absolutely nothing to do with NeoPixel-type LEDs.

The Adafruit Neopixel library work fine, for the on board RGB LED, with both my ESP32S3 devkit boards, so its seems unlikely their is an 'issue' with the libraries.

Indeed. It works! What a funny trick. Thank you.

ESP32-S3 onboard RGB LED

Projects Programming

bojan_jurca December 10, 2023, 10:18am 7

I went through all the pins, both with digitalWrite and pixels with no effect. It could also be that my board is damaged. I'll figure it out somehow.

Thank you very much.

Topic		Replies	Views
ESP32 S3 BlinkRGB.ino Advanced Example Sketch Showcase	14	1462	March 17, 2026
LED Blanche sur une ESP32-S3 Français	32	359	March 5, 2026
ESP32 S3 N16R8 and Ide Configuration IDE 2.x	50	4363	March 3, 2026
esp32s3-N16-R8 introuvable par EDI Français	5	82	April 8, 2026
Using Feather S2 RGB LED LEDs and Multiplexing	23	679	September 9, 2024

ESP32-S3 onboard RGB LED

Related topics