This software is an interface between the PiFace-addon-board for RaspberryPi and a MQTT-Broker. It publishes changes of the PiFace-inputs to MQTT. Likewise the PiFace-outputs are controllable via MQTT. In this first version the software connects only to a broker on localhost.
Input changes are published to topic piface/input/<nr. of input (0-7)>. Payload can be 0 or 1.
The payload is 1 when the input is low(button pressed) or 0 if it is open(high).
The Software subscribes to piface/output/+. The output channel can be 0-7. If you publish to piface/output/0 with payload 1 output0 on the PiFace will turned on. Payload 0 will turn it off.