Adafruit MCP23017 Library
Adafruit MCP23017 Library


This is a library for the MCP23017 i2c port expander

These displays use I2C to communicate, 2 pins are required to interface Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!


Written by Limor Fried/Ladyada for Adafruit Industries.


BSD license, all text above must be included in any redistribution