Hi.
I am in the process of installing my KNX. I am currently working with the MDT AKH-0800.03 heating actuator and the MDT SCN-RTN55S.01 room temperature extension. Both support the following temperature change formats:
1.007 DPT_Step
6.010 DPT_Value_1_Count
9.002 DPT_Value_Tempd
9.001 DPT_Value_Temp
Now I’m wondering which format should I choose? Are there any advantages/disadvantages, especially from the point of view that it should be integrated with HomeKit?
Thanks.
Hello Matthias,
thanks for your reply.
I was wondering if large temperature changes matter?
Because it could be that this change cannot be implemented with 1 step.
Then an absolute value would be the better choice…
If there are no limitations of HA, are there any other considerations as to which format to choose?
Thx
If you have other devices that only support one of the other 2 use that.
Other than that Shift-DPT 9 is more straightforward as it directly encodes temperst shift, Shift-DPT 6 needs a Multiplikator - mostly 0,1 and has 1byte smaller payload (which doesn’t really matter).
Sending the temperature directly, without a shift value would be my personal preference as it is the simplest and I don’t use different modes (other than frost protection which I don’t want to change value for).