Here How we can create MQTT topic for modbus-RTU to MQTT convertion data mapping ?

->In Modbus-RTU :- Slave id, slave_type :- a)RTU b)TCP , Reg type, Reg addr, Data type and Reg name
->Under MQTT :- Topic, Payload, QOS, Retain, publish immdiately, publish condition, Threshold value and Mode

How to map these parameters and create MQTT topic and payload data ?
After that we can send this converted data like in json format, we can send to the cloud

Please if anyone know about this MQTT topic and payload creation , help me to do this task

Thanks in advance

 

Hi,
you can convert modbus RTU to MQTT with IndigoSCADA,
the SCADA can act as protocol converter:
https://sourceforge.net/projects/indigoscada/
The MQTT paylod is encoded as Sparkplug B, not JSON.