Am I missing something? I have two PiFace and 3 Raspberry Pi. I followed the instructions the get the PiFace working but have yet to succeed. I have tried the image provided as well as updating an existing Raspian image to no avail. I have also tried all my Pi and the two PiFace in all the combinations. I almost gave up but also tried a different power supply and SD card. None of the above got the emulator to switch on the LEDs and I could not do it through Python. Any ideas? I've spent hours on this, please tell me I've missed something. Thanks.
