Adafruit MCP23017 Library
Adafruit MCP23X08/17 Library


This is a library for the MCP23008/17 I2C and MCP23S08/17 SPI port expanders. Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!


Written by Carter Nelson for Adafruit Industries.


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