Question

Hi, with MQTT software I have to communicate, via RS485 interface, with an SMA inverter via a TRB255 gateway. how should I write the code in the MQTT software to read and write on the registers?

I'm sorry for my english.

Answer 1

Hi, 

Does the SMA inverter support Modbus?
If yes, then you can install Modbus master on the TRB255 and get all the Modbus data from the SMA inverter's registers.
Follow the below tutorial:
https://wiki.teltonika-networks.com/view/Modbus_TCP_Master_MQTT_Gateway

Regards,
Raman

Comments

Thank you. I'll try. If I still have problems I will contact you again