MCP23017 Port Expander

Signal Input/Output

Arduino library for MCP23017 I2C I/O port expander.
This library implements functions like digitalWrite/digitalRead that interface directly with the port expander, allowing the user to easily add 16 more I/O ports to their design.

Author: ndomx

Maintainer: ndomx

Read the documentation


This library is compatible with all architectures so you should be able to use it on all the Arduino boards.


To use this library, open the Library Manager in the Arduino IDE and install it from there.