Node-RED – Voorbeeld – SDM120 modbus KWH meter uitlezen

Op deze pagina vind je een voorbeeld hoe je een SDM120 modbus KWH meter met modbus nodes uitleest.


This flow shows how to set up Eastron SDM120 single phase energy meter under Node-Red. For this I am using node-red-contrib-modbus for the serial modbus communication. There are a few fucntion nodes titled “Diagnostic message*” which is used for my diagnostic process. That process is not included in the flow and I will only post about it the future. So ignore them for the time being, or just implement your own logic for those sections.

I have also posted a relatively long video on setting up the energy meter, changing the modbus settings and detailed explanation how the flow works:

Project in Node-RED clipboard: