Python Protocol Gateway reads data via Modbus RTU or other protocols and translates the data for MQTT. In the long run, Python Protocol Gateway will become a general purpose protocol gateway to translate between more than just modbus and mqtt. Growatt, EG4, Sigineer, SOK, PACE
create a read only "reader" / "transport"
the purpose is sniff data when not master. since modbus rtu only allows for 1 master in many cases'