LED with ESP32-S3-DevKitC-1

Wiring for the LED with 220 Ω resistor on the ESP32-S3-DevKitC-1 (ESP32-S3, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

LED pin	Role	ESP32-S3-DevKitC-1 pin	Notes
A	Input to the part	4	Anode (long leg), through the resistor to a GPIO
K	Ground	G	Cathode (short leg, flat side)

Check before you power it on

Test code (Arduino)

void setup() {
  pinMode(4, OUTPUT);  // A on 4
}

void loop() {
  digitalWrite(4, HIGH);
  delay(500);
  digitalWrite(4, LOW);
  delay(500);
}

Arduino board: esp32:esp32:esp32s3. Use the port labelled UART. If uploading does not start, hold BOOT, press and release RESET, then release BOOT.

Questions

Which ESP32-S3-DevKitC-1 pins do I use for the LED?

A → 4, K → G.

Does the LED work with the ESP32-S3-DevKitC-1 at 3.3 V?

Yes: the LED runs at 3.3 V and the ESP32-S3-DevKitC-1 uses 3.3 V signals, so no level shifting is needed.

BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.

Download BoardPilot

Full ESP32-S3-DevKitC-1 pinout · LED with 220 Ω resistor: all pins and data

The LED on other boards

ESP32 DevKit Arduino Mega 2560 R3 Arduino Nano Arduino Uno R3 WeAct Black Pill STM32F411CE ESP32-C3-DevKitM-1 Nordic nRF52840 DK NUCLEO-F401RE Raspberry Pi Pico 2 Raspberry Pi Pico W Raspberry Pi Pico Teensy 4.1

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