U200 – Calibration issues since firmware update (daily re-calibration needed)
Since updating my Aqara Smart Lock U200 to firmware 3.0.0_0084, the lock has become very unreliable.
Calibration no longer works properly: automatic and manual calibration both fail. Even after a full reset, the problem comes back.
The lock is firmly mounted and the key turns smoothly by hand, so it’s not a mechanical issue.
I need to re-calibrate almost every day, and even then the calibration often doesn’t complete successfully.
Other symptoms since the update:
The motor sounds different than before. It sometimes moves in small jerks or turns very slowly, even though the door lock mechanism itself is easy to operate.
The latch (“tong”/spring bolt) often doesn’t trigger when unlocking. It stays retracted, so the door does not fall into the strike plate.
When I then try to manually turn the knob, it’s very hard to rotate because the motor resists. Before the firmware update, the knob felt free and easy to turn; now it feels like the motor is constantly pushing back.
All of this started only after the last firmware update. Before that, the U200 worked much more smoothly.
I am convinced this is firmware related and not a hardware defect. A reset or re-installation does not solve it.
I hope Aqara Support can provide a firmware fix soon, because at this moment the lock is not reliable enough to use daily.