Plugins are C/C++ shared library loaded by the binding to execute some simple routine. Routine could be on reception of a new signal or at sources initialization time or signal subscription with the respective JSON field onReceived, init and getSignals.

A default plugin (builtin) is provided with 2 functions:

  • defaultOnReceived: set and record a new signal value and its timestamp in the signal composer service. It simply tooks the incoming event JSON object and search for key value and timestamp then call function setSignalValue.
  • setSignalValueWrap: a lua2c function the could be called from any LUA script to record a new signal value.