Adafruit AW9523 GPIO Expander and LED Driver for Arduino 
This is a library for the AW9523 GPIO Expander and LED Driver
Designed specifically to work with the AW9523 breakout in the Adafruit shop:
These boards 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.
Installing this Library
Check out the links above for our tutorials and wiring diagrams. Use the Arduino library manager to install
We also have a great tutorial on Arduino library installation at: http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use