Hello,
since 2021 I have been using the Nuki Smart Lock 2.0 with satisfaction for a B&B, and recently I purchased a second identical unit.
Unfortunately, I had an unpleasant surprise—luckily while the door was open—when the lock became blocked, preventing both the rotation of the key from the outside and the knob from the inside, similar to what is described in this post: https://developer.nuki.io/t/motor-blocked-and-cant-access-the-home/20348
If the door had been closed and I had been outside, I probably would not have been able to access the apartment anymore. Conversely, if a guest had been inside, in order to get out they would have had to remove the battery and the Nuki device itself.
This is a very unpleasant situation and, I would say, even potentially dangerous.
Since newer Smart Lock versions have been released after the 2.0, I was wondering whether this issue has been resolved in the more recent models.
The Nuki Ultra has the same issue, it seizes up in the “Latch open” position and pretty much stops working unless I take it off the door. The issue has been randomly popping up regardless of the firmware version.
On the plus side, it has never seized up closed!
Thank you, Sebastian, for your input. It seems to me that this potential risk may also be present in the more recent models.
As I mentioned, with my current Mottura cylinder it is possible to insert two keys at the same time, but the rotation is mechanically linked (if I turn one key, the other one turns as well). Therefore, if the key on the inside gets stuck, I can no longer open the door from the outside.
That’s why I’m wondering whether a cylinder with a “decoupled rotation” function (e.g. around minute 4 of this video https://www.youtube.com/watch?v=nXprI5-9FXk) could make the solution safer. From what I understand, this function would allow me to turn the key and open from the outside even if the inside key is inserted but blocked and cannot be turned.
On the other hand, if the Smart Lock gets blocked when trying to exit, I believe the only workaround is to instruct guests how to remove the battery and, if necessary, also remove the Smart Lock from the door, so as to restore manual operation of the lock. In an emergency (for example, a fire), this still doesn’t make me feel very comfortable. It would be better to have an emergency release button on the Smart Lock that allows it to be removed quickly, so you can access the key on the inside directly.
I assume these safety-related aspects are important to Nuki as a company, so I’m a bit surprised that there hasn’t been any contribution from them to suggest solutions that could reassure their customers.