Jupiter GPIO Read
A node for reading the Jupiter Boards GPIO pins. It uses the wiringPI library in command line fashion. It has to be polled with any input (even empty) to provide a result.
Configuration parameters:
- "pin": the GPIO pin number as a string.
Inputs:
- msg.payload: triggers the flow execution.
Outputs:
- msg.payload: the GPIO digital value ("1" or "0").
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