The PiFace Digital is an I/O expansion board for the Raspberry Pi. It has to be installed by plugging it on to the GPIO of the Raspberry Pi. The PiFace website has its own guide which tells you how to set up the PiFace. I’d also like to provide you with my own guide to do this on Raspbian or Minibian.
Before proceeding, you should make sure you have executed step 2 and 3 of my first steps guide for Minibian. If you are logged in as an account other than the root account, you should add “
sudo” in front of all of the commands described in the guide. If you are running Raspbian with a desktop environment, you have to open a command-line terminal window first.