@Coldo 

This case seems to require further investigation. To help assist and streamline the identification of the behavior, we recommend sending an email to forumsupport.usa@tp-link.com with the following information:

Subject: [Forum Escalation][ID 867740] Tapo DL130 lock fail and keeps unlocking
Forum Nickname: Coldo
Thread URL: https://community.tp-link.com/us/smart-home/forum/topic/867740
Product Info (Model, Hardware&Firmware Versions, Mac address, etc): [User Provided]
Description: [User Provided]
Any Other Relevant Information (Logs, Config Files, Images, etc.): [User Provided]

*It will be helpful if you can share a video of the problem, and some pictures of your door lock installation.

Once sent, a ticket will be created in our support system, and a team member will follow up to gather more information or troubleshoot the issue.
 

  @Coldo 

After discussing your case with our team, the key issue likely lies in the depth of the strike hole on your door frame. If the hole is too shallow, the deadbolt can’t fully extend, which may trigger the error you’re seeing.

You can test this using the dust box that came with your lock. If it doesn’t fit all the way into the hole, then the depth isn’t enough.

Additionally, with the door closed, try manually turning the lock mechanism and check if there’s any noticeable resistance or obstruction.

The above guidance is also mentioned in this installation guide - Step 9. Install the strike plate: How to install Palm Vein & Fingerprint Recognition Tapo​​​​​​​ Smart Lock (Tapo DL130)

Coldo wrote

  @Wayne-TP 

If the strike hole was not deep enough, shouldn’t the calibration have failed in the first place?

Also, why did the lock work fine for the first three days and then start failing afterward? Every time I remove and reinsert the battery, the auto-lock function works for a few times, then starts failing again. At this point, I’m tired of troubleshooting it and will be returning the device.

 

  @Coldo 

Hardware installation is key, software only plays a supporting role and can’t replace a proper physical setup. The calibration feature in the app is designed as a final check after the hardware has been correctly installed, not as a substitute for verifying the installation itself.

Calibration ensures the lock can operate normally under generally acceptable conditions, but its success still depends on the installation being up to standard. If the strike hole is only slightly too shallow, the latch may still extend and retract with some resistance. As long as that resistance stays within the motor’s normal range, calibration will still pass. That’s why a successful calibration doesn’t guarantee the strike hole depth is sufficient. In short: calibration passing just means the lock can function for now, it doesn’t mean the setup is fully correct.

You can also check the thumb latch for a quick indicator. If it’s not sitting level when the door is locked, that’s another sign the strike hole isn’t deep enough.

Additionally, I’ve learned that a new firmware version for this model is about to be released, which greatly improves the product’s performance and is likely helpful with your situation as well. If you’d like, you can send your device’s MAC address to the email mentioned earlier (forumsupport.usa@tp-link.com), and then share the ticket ID with me. I’ll help request early access to the new firmware for you.