See pyModbusTCP documentation.
BMC HC 64 modbus TCP answers on port 502. Register values are read using function no. 3 'Read Holding Register'. One register has 2 bytes. Temperatures are stored as 2 byte integers.
A block of register addresses for room information starts
| Room no. | Address |
|---|---|
| 1 | 2033 |
| 2 | 2039 |
| 3 | 2045 |
| 4 | 2051 |
| 5 | 2057 |
| 6 | 2063 |
| 7 | 2069 |
| 8 | 2075 |
| ... |
There are 32 rooms.