** install bcm2835 from http://www.airspayce.com/mikem/bcm2835/
- install smbus, i2c tools
sudo apt-get install python-smbus sudo apt-get install i2c-tools
- scan devices - sudo i2cdetect -y 1
** install bcm2835 from http://www.airspayce.com/mikem/bcm2835/
sudo apt-get install python-smbus sudo apt-get install i2c-tools