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@MartinBruening,  I used the Viessmann.Parameter.Adresses.xlsx already.  What is the url of " the database of the Vitosoft program"?  And where can I find the poll_list. py script (+ instructions).  My setup is abt. the same as of FransOv , but without the office ("kantoor").  I don't know if I have a mixing valve.  How does it look like?   diagram optolink-bridge.jpg   ... Mehr anzeigen

Hallo @MartinBruening, I just started using the optolink-bridge to read my VITOCAL 300-G BWC 301.C16 heat pump data and to MQTT them to HA. I could not find a 100% matching datapoint address list yet. I have 2 addresses returning similar values: 0x01c5 and 0xb402.  It is not clear to me what the difference is, between the 2 matching address names I found on the internet: vorlauftemperatur_heizkreis_hk1 and vorlauftemperatur_sekundaer_hk1. Aren't they both secondary_circuit_supply_temperature in English?  I only have 1 secondary circuit: hk1 = underfloor heating. ... Mehr anzeigen