LED with Raspberry Pi Pico W

Wiring for the LED with 220 Ω resistor on the Raspberry Pi Pico W (RP2040, 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	Raspberry Pi Pico W pin	Notes
A	Input to the part	GP15	Anode (long leg), through the resistor to a GPIO
K	Ground	GND	Cathode (short leg, flat side)

Check before you power it on

Test code (Arduino)

void setup() {
  pinMode(15, OUTPUT);  // A on GP15
}

void loop() {
  digitalWrite(15, HIGH);
  delay(500);
  digitalWrite(15, LOW);
  delay(500);
}

Arduino board: rp2040:rp2040:rpipicow. If the board is not found, hold the BOOTSEL button while plugging in the USB cable.

Questions

Which Raspberry Pi Pico W pins do I use for the LED?

A → GP15, K → GND.

Does the LED work with the Raspberry Pi Pico W at 3.3 V?

Yes: the LED runs at 3.3 V and the Raspberry Pi Pico W 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 Raspberry Pi Pico W pinout · LED with 220 Ω resistor: all pins and data

The LED on other boards

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