Messed up DPT in KNX Climate target_temperature_address

Configuration
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1

Hi there,
I have some trouble with my KNX actuator and the home assistant climate device.
According to the documentation target_temperature_address is DPT 9.001 which means temperature in °C. But looking at the group monitor I see:

Telegramm 1540

20.01.2025, 17:02:36,030

Ausgehend

Quelle

1.1.15

Home Assistant

Ziel

11/7/0

Wohnzimmer

Nachricht

GroupValueWrite

DPT 9.002 temperature_difference_2byte

Daten

0x0c42

Wert

21.8 K

It says DPT 9.002 temperature_difference_2byte. That is wrong on two levels. First it should be DPT 9.001. Second if it is 9.002 it is not a temperature difference but a temperature in K.
My actuator does not like that and comes back with a different target_temperature_state_address value:

Telegramm 1541

20.01.2025, 17:02:36,210

Eingehend

Quelle

1.2.2

MDT technologies Heizungsaktor 8-fach, 230V, EG

Ziel

11/1/0

Wohnzimmer

Nachricht

GroupValueWrite

DPT 9.001 temperature

Daten

0x0c8d

Wert

23.3 °C

Am I doing something wrong here?

2

9.001 and 9.002 doesn’t make any difference in runtime. It encodes the values the same way.
DPT / unit isn’t sent over the wire - it is only used for monitor / trigger infos.

3

Thanks.
Any Idea why the actuator does not apply the requested target temperature?
In my case I wanted 21.8 and it applied 23.3.

4

I don’t know, but there is a whole thread about that actuator that may help you - or let you find other users of that device.