Hello,
I am integrating my louvered shutters (blinds) and I have a DPT problem on a cover.
The actuator module is a TXA207C from Hager.
Here is a capture of my configuration in approximation to my actuator configuration.
The problem is quite simple : on the actuator, the feedback of the slat tilt is expressed by the module in degrees but only between 0 and 180°, while home-assistant expects a result in % with a DTP 5.001 (https://www.home-assistant.io/integrations/knx/#angle_state_address )
- name: "Cuisine"
move_long_address: '13/4'
move_short_address: '13/204'
stop_address: '13/204'
position_address: '13/604'
position_state_address: '13/1004'
angle_address: '13/804'
angle_state_address: '13/404'
If we take the raw value, without translation of the DTP, via the bus monitor.
Blades open horizontally, I read on the bus for group address 13/404: 0x00 (0 in decimal)
I go down one pulse (increase), 13/404 goes to 0x2D (45 in decimal)
another increase on 13/204 -> 13/404 goes to 0x5A (90 in decimal)
again an increase on 13/204 -> 13/404 goes to 0x87 (135 in decimal)
another increase on 13/204 -> 13/404 goes to 0xB4 (180 in decimal)
At this point, my blades are vertical, closed, if I increase again, the shutter goes down, so I am at 100% of the tilt, which corresponds to 180 in decimal ( … 180°) for the actuator.
So this TXA207C (and certainly the other Hager modules of this generation) the tilt feedback returns an angle ranging from 0 to 180°.
Now, let’s see what it does on the Home Assistant side.
On the Home Assistant side, I get a wrong percentage on angle_state_address, I get 70.58%, because Home Assistant with the DTP 5.001 makes (180 / 255) * 100 = 70.58.
So ~70% even though I am closed under KNX and in real.
I can not even say that the solution would be to use a DTP 5.003, because with this DTP, the translation of the feedback of the leds varies from 0° to 254°.
I think it is a DTP 5.xxx generic 0-180 raw (or 0x00 - 0xB4 if you prefer)
The problem occurs in the other direction too, from the angle_address entity to the KNX bus, home assistant sends a percentage that the actuator takes as an angle.
Of course, I keep in mind that KNX integration can’t be adapted to every manufacturer/configuration, but for the time being, Hager a big manufacturer, and I tell myself that I must not be the only one to have feedback in this form and that it may be a problem that others may have. Or maybe there is a solution on the KNX side or upstream.
