Which node to use to communicate Lumel ND30IoT with EPC 1502 via MQTT

General
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Hi
I want to communicate ND30IoT which is a meter with Phoenix contact PC "EPC 1502" via MQTT.

On EPC i have downloaded MQTT Mosqitto brocker. Later i connected MQTT out with in node successfully. But i have no idea on how to insert data from ND30.
I used plc-write-variables with IP of ND30 but i won't connect.
Any idea?

TIA :slight_smile:
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...not quite clear to me, what you want to achieve.
According to this: https://www.lumel.de/resources/Pliki%20do%20pobrania/ND30IoT/ND30IoT_service_manual.pdf the ND30IoT will connect directly to the Broker on your EPC (if set up correctly), so using Node-Red as an intermediate is not required.
In order to subscribe to data fom the ND30 via Node-Red, use the mqtt-in node and the appropriate topic to subscribe to.
I suggest, that you make yourself familiar with how mqtt communication works and also inspect the topics in your Broker on your EPC with a more generic tool, like MQTT Explorer.