Status of Switch in UI wrong, if channel is locked

[henfri]

Hello,

based on
https://knx-user-forum.de/forum/%C3%B6ffentlicher-bereich/knx-eib-forum/1992352-korrekte-status-anzeige-bei-gesperrtem-aktor/page2#post1992693

If a channel in KNX-Actor is locked, the Status in HA may not reflect the status of the Actor-Channel.
Example:

• Channel is Locked and Off
• Status in HA is correct (off)
• User switches Channel externally on --> all good, status remains off in HA
• User switches Channel in HA UI on --> Switch in UI turns ON, but Actor stays OFF and does not send a status (as it only sends on change; as per KNX Standard the old value remains valid - state driven)

To fix this, the following would be needed:

• UI does not react directly on User interaction
• Instead UI waits for Status from Actor

A workaround could be to request the status after pressing the button. This would mean that the UI is wrong for a brief moment (ON in the example above) and correct after the status comes (OFF).

In both cases, I think it makes sense to make this behaviour configurable.

Considering that this issue is rare and the full fix seems quite laborous to implement, whilst the workaround seems fairly easy, I think the workaround is worth considering.

Whilst the issue may be rare, I think it is important to fix, as I see the impact of a wrong status quite high.

• A door may be unlocked, while it shows locked
• A water pump may be running, while it shows not running
• A Sauna Oven may be running, while it shows not running

Greetings,
Hendrik