Digital I/O

Board-Specific Pins

The Raspberry Pi Pico RP2040 chip supports up to 30 digital I/O pins, however not all boards provide access to all pins.

Tone/noTone

Simple square wave tone generation is possible for up to 8 channels using Arduino standard tone calls. Because these use the PIO to generate the waveform, they must share resources with other calls such as I2S or Servo objects.