Raspberry Pi GPIO Pin Usage

Raspberry Pi GPIO Pin mapping and connections
Created: 02/10/2015 | Last Updated: 02/10/2015

Our Raspberry Pi Expansion boards use either the I2C pins, UART or SPI pins on the Raspberry Pi 's GPIO header.

All of the other GPIO pins are available to use via the stacking header connector.

I2C Pin Usage

The following expansion boards use the I2C GPIO pins:

1 Wire Pi Plus and 1 Wire Pi Zero

ADC Pi

ADC Differential Pi

Expander Pi

IO Pi, IO Pi Plus and IO Pi Zero

RTC Pi

Servo Pi

SPI Pin Usage

The following expansion boards use the SPI GPIO pins:

ADC-DAC Pi Zero

Expander Pi

UART Pin Usage

The following expansion boards use the UART GPIO pins:

RS485 Pi

Serial Pi, Serial Pi Plus and Serial Pi Zero