This is an old revision of the document!

IP Selctor

MCP23008 and MCP23017
Configuration:
http://raspberrypi-aa.github.io/session3/i2c.html
http://www.gsurf.de/vorbereiten-des-raspberry-pi-auf-i2c/

Open the file:

sudo nano /etc/modprobe.d/raspi-blacklist.conf

Comment out:

#blacklist i2c-bcm2708

Open the file:

sudo nano /etc/modules

Add:

i2c-dev

Library:
https://learn.adafruit.com/mcp230xx-gpio-expander-on-the-raspberry-pi/overview