Mcp23017 - Getting started

Arduino library

To install the Arduino library, you can download it from the GitHub repository:

IO expander MCP23017 breakout Arduino library

IO expander Arduino library by Soldered

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First time Arduino user? For a detailed tutorial on how to get started with Arduino, see this section of our docs:

Getting started with Arduino

A full, comprehensive tutorial on how to fully set up and upload code for the first time on an Arduino board, from scratch!

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Connections

Below is an example connection diagram for Dasduino CONNECTPLUS. These pins will be used in the examples throughout this documentation.

Dasduino CONNECTPLUS	Breakout Board
Qwiic	Qwiic

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If you prefer, you can use I2C pins to manually connect: