I've been looking at adding relays to a system that uses a PiFaceCAD and a B+ board. I thought the RelayPlus would be suitable as it is HAT compatiable and can the CAD can be attached on the top keeping basically the same form factor which is nice and compact.
I can access both the PiFaceCAD the RelayPlus in isolation but when I initiatlise them in the same python app the call back on the CAD buttons stop working. It leaves the CAD is an inconsistent state and it needs power cycle to reset it
Any thoughts/comments?