My lock works well but it has a safety issue. I recently returned home and entered through the garage instead of the front door where the lock is mounted. A couple hours later I passed by the front door and saw it was unlocked. I looked at the app and saw the door never locked after I left. Luckily the locked door wasn’t needed during this time period.
I investigated this failure and found the issue for this occurrence. My battery level was 23%. It would unlock the door but it would not relock, or try to relock, the door. I repeated this test with new and the existing batteries several times and got the same results. For those wondering, there is no problem with the lock/door interface; the bolt moves freely in and out. The lock would lock, and unlock, the door when commanded through the app.
There maybe a way to correct this low battery issue. There may be other ways the lock will fail to auto-lock.
A huge improvement for this issue can be made with information already in the lock/app. The app knows when the door is to auto-lock after closing, The app also knows the door was opened, when it closed, when the door should auto-lock, and the current time. When the door fails to auto-lock an alert could be sent to the user that the door failed to lock so the user can take appropriate action. I suggest the alert should continue until the user turns the alert off.
[Mod Edit]: Title Modified to Enhance Search Clarity.