The problem

I have the following configuration that works:

climate:
- name: "Master Bedroom"
temperature_address: "10/3/9"
target_temperature_state_address: "10/3/8"
operation_mode_address: "10/3/20"
operation_mode_state_address: "10/3/21"
controller_mode_address: "10/3/0"
controller_mode_state_address: "10/3/11"
on_off_address: "10/3/12"
on_off_state_address: "10/3/10"

However, i can't control the temperature and get this error

2025-08-09 15:30:23.117 WARNING (MainThread) [xknx.log] Attempted to set value for non-writable device: Master Bedroom - Target temperature (value: 28.700000000000003)

This is expected because the thermostat does not have a writable target setpoint entity. Instead i should use setpoint shift entities. So i added

  setpoint_shift_address: "10/3/14"
  setpoint_shift_state_address: "10/4/14"

after that the thermostat became unavailable. I added the

setpoint_shift_mode: "DPT9002"

and

setpoint_shift_mode: "DPT60110 (gave error "Invalid payload length for DPTValue1Count (6.010)")

without success. And there are no logs to point toward what is happening. i presume this is a compatibility thing but i am not sure.

What version of Home Assistant Core has the issue?

core-2025.8.0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

KNX

Link to integration documentation on our website

https://www.home-assistant.io/integrations/knx/#climate

Diagnostics information

home-assistant_2025-08-09T14-00-01.834Z.log

Example YAML snippet

climate:
    - name: "Master Bedroom"
      temperature_address: "10/3/9"
      target_temperature_state_address: "10/3/8"
      operation_mode_address: "10/3/20"
      operation_mode_state_address: "10/3/21"
      controller_mode_address: "10/3/0"
      controller_mode_state_address: "10/3/11"
      on_off_address: "10/3/12"
      on_off_state_address: "10/3/10"
      setpoint_shift_address: "10/3/14"
      setpoint_shift_state_address: "10/4/14"
      setpoint_shift_mode: "DPT9002"

Anything in the logs that might be useful for us?

Additional information

No response