Interactive pinout

Raspberry Pi Pico pinout

The Raspberry Pi Pico 40-pin layout with the USB port at the top. Physical pin numbers are shown beside the GP names; use the GP number in code.

GPIO
Power
Ground / N.C.
Reset
Has a warning

Selected pin

GP0GPIO0physical pin 1

Safe to use

GPIOPWMI2CSPIUART

Default UART0 TX.

uart: UART0 TX
i2c: I2C0 SDA
spi: SPI0 RX

Code for this pin

const int PIN = 0;

void setup() {
  pinMode(PIN, OUTPUT);
}

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

Good to know

›Every GPIO can do PWM and work with PIO. Only GP26–GP28 can be analog inputs (ADC0–ADC2).
›GP29 (ADC3) is internally wired to measure VSYS/3 — it is not on the headers.
›GP25 drives the on-board LED. GP23 and GP24 are used internally (power mode and VBUS detect).

Full Raspberry Pi Pico specs ESP32 pins to avoid

Where to buy

Adafruit SparkFun Amazon AliExpress

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GP0GPIO0physical pin 1

Code for this pin

Good to know

Where to buy

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