Enable I2C communication first:
sudo raspi-config
A good article about I2C on Raspberry can be found here.
If you use Ubuntu you need to install raspi-config
first:
sudo apt update
sudo apt install raspi-config
Make sure you have all tools you need:
sudo apt update
sudo apt-get install git build-essential
Install the command:
git clone https://github.com/SequentMicrosystems/multiio-rpi.git
cd multiio-rpi/
sudo make install
Now you can access all the functions of the Multi-IO through the command "multiio". Use -h option for help:
multiio -h
If you clone the repository any update can be made with the following commands:
cd multiio-rpi/
git pull
sudo make install
The repository contains usage examples