Setup
Enable Raspberry Pi I2C communication:

~$ sudo raspi-config
Usage
~$ git clone https://github.com/SequentMicrosystems/ioplus-rpi.git
~$ cd ioplus-rpi/
~/ioplus-rpi$ sudo make install
Now you can access all the functions of the relays board through the command "ioplus". Use -h option for help:

~$ ioplus -h
If you clone the repository any update can be made with the following commands:

~$ cd ioplus-rpi/  
~/ioplus-rpi$ git pull
~/ioplus-rpi$ sudo make install