Moving knob of Smart Lock (4th gen) all they way to open position disconnects HomeKit Matter connection and LED stays permanently ON

Nuki APIs Matter
, ,
1

Hello team,

I have noticed strange behavior of my Smart Lock (4-th gen) - when I turn knob manually all the way to open position so that it physically cannot go any further, lower segment of the LED ring is permanently ON and also during that moment device start being reported as “not responding” in AppleKit and I cannot control it using Apple Home app.
However as soon as I turn knob to opposite direction (just a little bit), LED goes off and immediately AppleKit sends a notification that the Lock is open (so this means that communication over Matter with AppleKit gets restored).

During the time of the issue - when I open Nuki app - there is no issue with communication (over bluetooth), Nuki app is able to connect with the Lock and sees it’s status and I’m able to control the lock.
Also during the time of the issue connection with HomeAssistant (over Matter) does not get impacted.

I’m not sure what this means when lower part of LED is permanently on (not just flashes once) and it eventually turns off after few minutes.

So when I’m leaving the home, I’m also often shutting down connection with AppleKit if I turn knob all the way to open position and then device cannot be controlled or monitored over Apple HomeKit (automation stops working as well) until someone inside will turn the knob a little bit to opposite direction.

It looks like when knob is turned all the way in open position - device enters in some sort of maintenance mode or something (which affects AppleKit connection)?

I’m running on latest firmware, I have also tried to reset device to factory setting (issue is still present).

Any help will be greatly appreciated.

1 Like
2

Trying to understand you: I have a Nuki 4.0 Pro. To unlock the door, either via the Nuki app or in the Apple Home app or by hand, the round “knob” turns to the LEFT (so counterclock-wise) and when locking it turns to the right (so with the clock). Why would you when the lock is unlocked and the door is open, turn the “knob” fully to the right?

3

Well, I think it all depends on which side of the door your Smart Lock is installed.
If it’s installed on left side than to open it you need to turn knob to the right.
If it’s installed on the right side of door, to open it you have to turn knob left to open it.
Anyway the issue is when Knob is turned all the way to the very end of the open position.
You cannot reproduce this by opening door via app because in this case knob will not go to the very end.
You have to manually turn the knob to the end and then LED will start illuminating and Apple HomeKit gets disconnected.

Just recently I was able to find something new about the issue.
If I will be keep turning knob very very slowly gradually (inch by inch) till knob is at the very end of open position and physically cannot go any further, then issue is not reproduced (LED remains off and HomeKit remains connected).
However if I will go with normal speed (not fast, just normal) - then this issue can be reproduced every time.
Super strange - it will be more easy to show it on video.
Thank you for response Cornelis.

Can anyone check if LED starts to illuminate when you move knob manually to the very end of open position ?

1 Like
4

Understood!

1 Like