I2CRelay: A library to control 8-channel relay boards via PCF8574 I2C

WORK IN PROGRESS - Not really usable yet.

Hardware

• PCF8574 I2C I/O Expansion Board (http://a.co/bdogwFe)
• SainSmart 8-Channel Relay Module (http://a.co/48AtFQ6)

I2C Device Permissions

The user running the scripts needs access to the i2c devices in the /dev tree. Instead of running the code as root you can add your user to the i2c group.