This is a Nibe GW for ESP32 which publish all data to MQTT. It is based on openhab.
To me important registers are known to NibeGW so it can interpret the values.
Nibe will send out a set of 20 register values, which are defined by the LOG.SET file per USB on the heat pump.
Additional registers can be read by the topic nibeF730/read/40004, every known register can be chosen after read.
For editing register values of the heat pump publish the value to nibeF730/write/43005 -60, the logic of read applies here too.
If you need more registers you can add them through publishing to this topic nibeF730/add {"register":"43005","factor":"10","size":"4"}, the size parameter is defined as follows:
0:=unsigned 1 byte(U8); 1:=unsigned 2 bytes(U16); 2:=unsigned 4 bytes(U32); 3:=signed 1 byte(S8); 4:=signed 2 bytes(S16); 5:=signed 4 bytes(S32).
The factor is used to transform decimals into integers, like this nibeF730/write/43005 -12.7, the -12.7 is multiplied with 10 to form -127 which is send to the heat pump or the other way round, the heat pump sends -778 and it got divided by 10 to form -77.8.