Use modbus TCP on Port 502

[pme101]

Hello,

I have a Goodwe GW20K-ET with the Wifi/LAN Kit 2.0. Modbus TCP seems to work correctly on the inverter (at least I can successfully read via Modbus TCP on port 502 with the following script: https://www.photovoltaikforum.com/thread/237857-modbus-scanner-und-werkzeuge-f%C3%BCr-goodwe-wechselrichter/?postID=4014428#post4014428).

According to the documentation of this package, Modbus TCP should be supported since v0.4.x. I have version 0.4.8 of the goodie package and use Python 3.13.x.

When I try to run the test script (with the correct IP address of the inverter), I get the following error:

goodwe.exceptions.InverterError: Unable to connect to the inverter at host=192.168.68.63, or your inverter is not supported yet. Failures=[RequestFailedException("No valid response received to 'aa55c07f0102000241' request."), RequestFailedException("No valid response received to 'f70388b800213ac1' request.", 1), RequestFailedException("No valid response received to '7f03753100280409' request.", 1), RequestFailedException("No valid response received to 'aa55c07f0102000241' request.", 1)]

Any idea what could be causing my issue?

Thanks!