jan iversen

yes that is acceptable. The current yaml is already broken, since the actual needed yaml do not correspond to the documentation, so this is a bug solve.

the parameter slave is documented !!! just look in the documentation: https://www.home-assistant.io/integrations/modbus/#configuring-platform-common-parameters

Please provide some debug log so we can see if the problem is in the modbus integration, the Pymodbus library or as per the closed issue in another integration. Please...

Yes there was several changes to the modbus integration, but if the stiebel_eltron uses its own library it surely do not use the modbus integration. The stiebel_eltron library might use...

changed the label to stiebel_eltron and unsubscribed myself.

It does, but the problem seems to be that the stiebel_eltron integration have not been updated, at least in the log supplied (which was without debug) do not suggest any...

This line signals a problem: 2022-11-07 16:43:05.192 WARNING (SyncWorker_2) [homeassistant.components.stiebel_eltron] Modbus read failed you have not enabled debug log as we document in the modbus integration (you miss the pymodbus...

Yes it is implemented and part of the test suite, but let me try to simulate your configuration.

What type of sensor are you using ? It is a bit hard to guess because your yaml starts with "- name".

You have not added the verify part https://www.home-assistant.io/integrations/modbus/#configuring-platform-switch, so naturally the switch in HA will not update.