Nuki Door Sensor 3.0 not responding after some time

Hi Everyone!

I have a problem with the Nuki Door Sensor (Firmware version: 1.0.17) connected to my Nuki SmartLock 3.0 Pro:
Most of the time the door sensor works well. But after some time (days, weeks after calibration) the door sensor doesn’t respond anymore. In the protocol I can’t see a state change of the sensor anymore. I also managed to activate the debug mode to see additional log messages in the protocol, but also with the debug mode activated, I can’t see further door sensor log messages (Basically I can’t see any debug messages at all). Most of the time a re-calibration fixes this problem, sometimes I have to re-activate the door sensor again.

The re-calibration resp. re-activation process annoys me. Can you please tell my, why the door sensor doesn’t respond anymore? Maybe a bug in the firmware?


A bug is very unlikely as the door sensor is working very reliable for most users. If a reactivation/-calibration fixes the problem it’s very likely that it is because of your mounting position. Could make sense to reposition the magnet following this guide.

If you continue to have problems, please contact our support via the Nuki App (Menu > Help > Contact Customer Support) for more detailed information. This forum is focused on developer related issues.

Hi Matthias,

did you solve your problem? My Nuki door sensor also stops working after some time and I need to recalibrate or reconnect it. I also have it connected to a 3.0 Pro.

Same experience for me. The door sensor works without any problem for weeks and months but then suddenly just stops for no reason. I usually notice it when the Lock’n’Go doesn’t immediately lock anymore after I close the door.
I really doubt it’s the positioning of the magnet, since I never get false readings etc. I had to pop the battery out of the sensor last time to get it to reconnect again.
Problem occured 3 times since I installed it together with a SL 3.0 in Nov 2021.

I have the same exact issue. After some time I cannot just restart it but have to do the full re-install / calibration again.

I mentioned this already in another post as well. See here.

And also the Lock and Go does not work after closing the door, just after 60 seconds as if one is not using a door sensor at all.

After repositioning my sensor it works like a charm. Thank you.

as mentioned above, it happened now again.

@MattDog_06 Would you mind sharing a picture of the new position of your door sensor please as I am suffering the same issue. Thanks a lot!

My sensor wont even light up with the button depressed. It is not even 6 months so it cannot be battery. anyone else having this problem?

You should still try to put in a new battery. If the problem persists please contact our support via the Nuki App (Menu > Help > Contact Customer Support).

Hi all,

I have the exact same problem as you and the one who opened this thread described.
I Tried to contact support but until now no solution has been found. I even tried to reposition the door sensor but this didn’t help as well…
Can anyone post pictures of their door sensor location so anyone who faces these problems can verify if indeed this is the issue or it is related to a bug after all?

Thanks in advance!

Hi Matthias,

Can you please send pictures of your door sensor (before and after would probably solve these kind of problems for many users).

Thanks a lot!

Same with me,
after a small check, battery HS after only 2 months of use. frankly not great for an ER14250 battery