especially for my children the registered fingerprints are not recognised even if the fingerprint registration process has been completed successfully. Use case: a fingerprint has been registered successfully. Immediately afterwards the same fingerprint is not recognised anymore. Nothing has changed in between, hands are still clean for example.
Already twice the keypad 2.0 was replaced by Nuki support (they mentioned the sensor is damaged), but the issue was not solved. It seems that the software “forgets” the registered fingerprints or does not recognise the fingerprint attributes correctly.
It is also not possible anymore - I was told - to register the same fingerprint several times for improving the recognition.
Due to the fact that the registration process works fine the sensor seems not to be the case, rather the softwarebased recognition process.
How can the the recognition process be improved (e.g. by the software), because it is very frustrating not to use the fingerprint sensor as expected and how it is supposed to.
A smart lock 5th gen is used. All firmwares are up-to-date.
Hello Tobias,
Thanks for reaching out! It’s not uncommon for fingerprint sensors to have trouble with children’s fingers. Here’s a quick explanation:
Fingerprint sensors rely on a clear, detailed ridge pattern to create a usable template. However, a child’s fingerprints are much smaller and less developed than an adult’s. The ridges can be finer, and the skin itself is softer and more prone to minor abrasions, which can make it difficult for the sensor to get a good reading. As your child grows, their fingerprints will become more defined and the sensor’s performance should improve.
In the Keypad 2 the fingerprint sensor itself is doing the registration and matching. We work with latest software versions of the sensor manufacturer, which ensures best performance of the sensor. Still we have to accept some limitations of this technology.
Honestly I am not very happy about the feedback. As far as I understood you correctly the Nuki development is not in the position to improve and optimise the performance of the sensor because this can only be done by the manufacturer.
I was hoping that especially the fingerprint registration process can be improved (the registration steps are very few compared to others) because if I use e.g. an Android smartphone the same fingerprint of my son is used without any problems (the registraion as well as the recognising process). My assumption is that it is associated with the longer and more detailed registration process whichj detects more characteristics.
The Nuki support has already indicated that the quality of the fingerprint sensor is not very good and quite often the sensor are defective. This was the reason why the keypad 2 was replaced three times but without any improvements.
I am afraid, it is not sufficient to read that some limitations of this technology need to be accepted. The keypad 2 costs 150 EURO which seems not to be worth it with regards to the explanations.
Could you please confirm that NUKI is not able or allowed to improve the quality of the sensor – via software optimisations or another sensor hardware? So no further updates can solve the issue.