Hello, I have added a modbus via serial RS485 to my home assistant. My information is rather old. I am wondering if there are more variables available, especially volume values and with it heat capacity values.
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Hi, I have a 7 page document with adresses and other data. Currently I can’t find the time to dive into this, but maybe we can help each other with this 
Let met know your thoughts
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Very Cool. Do you have a PHNIX Greentherm? I also tried to hookup a MODBUS-Dongle. Reading registers work, but writing is not possible. @Herbertnl You seem to have a complete MODBUS Register list. This is awesome. Is this publicly available? I Have found out several Registers by try-and-error (changing some parameters forth and back and then see which registers changed by sniffing on the MODBUS). E.g. These:
1001,“Serial Number 1/7 [hex]”
1002,“Serial Number 2/7 [hex]”
1003,“Serial Number 3/7 [hex]”
1004,“Serial Number 4/7 [hex]”
1005,“Serial Number 5/7 [hex]”
1006,“Serial Number 6/7 [hex]”
1007,“Serial Number 7/7 [hex]”
1010,“Bank base”
1011,“Power on/off [0=off,1=on]”
Then it seems to continue with your list.
Sources: Wäremepumpe (The manuals are from 2021 and seem to be outdated/old version ?)
Sir im trying to connect like you. But i dont get any data. Can you show me what is your connection. Slave address is decimal 10. 10 is right? Sir
i’ve send pm