Smart Lock Ultra/Pro/Go Firmware Beta 5.5.x

Smart Lock Ultra/Pro/Go Updates

Smart Lock Beta 5.5.0
(02.07.2025)

  • Enhanced logging for Beta-user troubleshooting

Smart Lock Beta 5.5.1
(17.07.2025)

Smart Lock Beta 5.5.2
(24.07.2025)

Smart Lock Beta 5.5.3
(13.08.2025)

  • This new Beta improves the device’s calibration performance.

Smart Lock Beta 5.5.4
(19.08.2025)

  • Enhanced Motor Control: Enjoy a steadier and quieter operation. - Ultra and Pro only!
  • Matter Improvements: All Smart Lock state changes are now consistently indicated.
  • Performance & Stability: We’ve made general improvements for a more reliable experience.

Smart Lock Beta 5.5.5
(28.08.2025)

  • Performance Improvements for the Motor Control - Ultra and Pro only!
    • Fixed a critical issue which caused that the Smart Lock did not disengage properly after executing an unlatch action
    • General performance improvements

Smart Lock Beta 5.5.6
(11.09.2025)

  • Improvements for the motor control of Ultra and Pro, ensuring proper function especially for pulling the latch

Smart Lock Beta 5.5.7
(15.09.2025)

  • Performance improvements for the Smart Lock, ensuring its reliability - Ultra and Pro only!

If you have problems with the WiFi connection of your Smart Lock, please follow the advice in the FAQ before you post here in the forum.

2 Likes

three times tried to install, not possible. Ultra don’t load the firmware.

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For me only this firmware available not bèta 5.5.x

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After first update latest stable firmware, latest beta available…

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Initial post has been updated with the release notes of the new Beta 5.5.1

This Beta implements smaller improvements for the general system stability of the Smart Lock.

Please provide your feedback on the Beta via this thread

3 Likes

Initial post has been updated with the release notes of the new Beta 5.5.2

This Beta further optimizes the device performance and improves signalizations patterns. Additionally it fixes a critical issue which seldomly caused the Smart Lock to crash during the execution of lock actions which were triggered via MQTTT (as mentioned here: Nuki Smart Lock Pro Chrashing)

4 Likes

This alone should warrant a fast track to production/release.

3 Likes

Now with the new Version 5.5.3 the Problems with the hanging Lock seems to be gone.
2 Little noises when unlatching, but no problems

3 Likes

sometimes the lock misses the end point causing it to “stutter” recalibrating does not solve the problem

2 Likes

Can you give us some official infos on 5.5.3?

1 Like

My Smart Lock Ultra just startet to open-close itself. Without any interaction. No idea why. Cannot stop it, also no access via the App.

Now I have to wait till the battery is off or it self destroy.

Never seen this before. Really confusing.

Edit: After it getting hot I have pushed the Button long enough till it went in maintenance mode. After complete re-adjustment and reconnect the door sensor and keypad it worked again.

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What’s stated in the Smart Locks activity log as source of the lock actions?

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Hi,

Unable to scroll to the start of the event (basic customer view in the protocol). However, it state allot of the attached ones. As mentioned, I didn’t stop by itself. Only keep pushing the button till it entered the maintenance mode was the only way to gain access through the App before starting the calibration.

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Thank you.
Can you also send my your night mode settings and the list of scheduled timers (Zeitsteuerung) either here or via PM?

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Initial post has been updated with the release notes of the new Beta 5.5.4 (and retrospectively for Beta 5.5.3).

This release focuses on improving the core performance and reliability of the Smart Lock. We’ve enhanced motor control for a quieter, more stable operation of your Smart Lock Ultra and Pro, and made key Matter improvements to ensure all state changes are accurately and consistently displayed. You’ll also notice general performance and stability enhancements for a more dependable experience.

3 Likes

Up and running… after this update i did lock calibration.

Lets see what happens with my “missing the endpoint” issue :pray:

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Since the last update, I’ve had a few problems where the motor is blocked and the latch doesn’t come out. After calibrating a few times, the problem is solved, but this isn’t the solution.

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5.5.4: My Ultra just destroyed the gear because it lost its calibration and tried to open the lock with one hit. This has happened also sometimes before . Today, the Ultra also damaged the door lock. Who will now cover the damages? I don’t want the Ultra anymore, I want to return it. The support has been reassuring me about updates for 8 months now, and it’s only getting worse!

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you re right. Very unsatisfied - maybe early adopters of ultra users shoud get a huge discount

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Worst update ever. Every so often, the motor gets blocked. I have to calibrate it six times to get it right again. Please fix it!

1 Like