Communication between two fx30 modules via TCP/IP or Modbus

Hello, I currently need to find a solution to make two sierra fx30 modules communicate with each other (TCP/IP or MQTT or Modbus) permanently in order to be able to report when one of the two stops responding (loss of connection, no longer on the network, etc).
The problem is that I have no idea how to do this as it is not in my area of expertise.
I have read a lot of documentation but all the solutions talk about serial port… My modules are in Ethernet and have no serial port!
How can I do it ? Thank you in advance for your help.

ps: I use Node-Red to do this and I can’t download other node. I have to use ONLY basic node…

Hi @tatiana.borgi

You can use the IoT card to communicate between two fx30 modules via TCP/IP (741.0 KB)

or communicate between them via Mobus.

Please refer to the below link for more information.

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