How do I config modbus tcp for Nibe S1255?

I’m trying to integrate my Nibe S1255 heat pump via Modbus tcp but fails. I have read in e.g. NIBE Uplink API component that @johanschelin managed to connect to a similair heat pump.

I have activated Modbus TCP in the heat pump according to the instructions i received. I have network connectivity via ethernet. I have tried a few configurations and the following is the one used in the link above:

 modbus:
   - name: "Nibe"
     type: tcp
     host: 192.168.44.20
     port: 502
     sensors:
     - name: "Varmvatten_BT7"
       unit_of_measurement: °C
       address: 8
       count: 1
       slave: 1
       precision: 1
       input_type: input
       scale: 0.1
       scan_interval: 60
     - name: "BrineInBT10"
       unit_of_measurement: °C
       address: 10
       count: 1
       precision: 1
       slave: 1
       input_type: input
       scale: 0.1
       scan_interval: 60
     - name: "BrineUtBT11"
       unit_of_measurement: °C
       address: 11
       count: 1
       precision: 1
       slave: 1
       input_type: input
       scale: 0.1

In the logs I get the following:

Logger: homeassistant.components.modbus.modbus
Source: components/modbus/modbus.py:291
Integration: Modbus (documentation, issues)
First occurred: 16:25:20 (1 occurrences)
Last logged: 16:25:20

Pymodbus: Nibe S1255: Modbus Error: [Input/Output] Modbus Error: [Invalid Message] No response received, expected at least 8 bytes (0 received)

Both HA and the heat pump are on the same network and they are connected to the same network switch.

I don’t know where to look for problems. Anyone who knows what I can improve?

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