Hi,
I currently have 2 PiFace Digitals (Rev 1) installed in a Pi Rack plugged into a Raspberry Pi Mod A, running my home security/automation system. I need to add some more I/O pins, so I'd like to add another PiFace but all I can find for sale is the new Rev 2 PiFace. Is the Rev 2 backwards compatible? Can I install it in my existing Pi Rack with the 2 current Rev 1's? Will I need to make any changes to my Python code for the Rev 2?
Thanks
John
