How to Install the Aqara U200 Smart Lock with HomeKey on an Old Door? #apple #homekit #tutorial

The presenter unboxes the Aqara U200 Smart Lock and plans to install it. An old, uneven door surface makes the adhesive method difficult without a new shield. The preferred screw method is not possible due to the existing lock's design. The presenter opts for the adhesive method, first using alcohol to clean the new shield and the door handle to ensure proper adhesion.

The video demonstrates how to position the smart lock's components, specifically the part that goes over the key. Inserts are available for doors where the handle protrudes further. It's crucial to ensure the key can rotate freely after installation. The presenter references the Aqara manual for installation guidance and notes that his current lock cylinder protrudes less than 3mm, which might be an issue for the adhesive installation.

Following the manual, the yellow adhesive strip is applied to the fixed plate (inside), and the red one goes outside. The door is thoroughly cleaned before applying the adhesive. The presenter applies the adhesive strips to the necessary components and presses them for 60 seconds to secure them. Additional adhesive inserts are used to level the smart lock, noting that screws could be added for extra strength.

After securing the adhesive plate to the door, the main smart lock unit is attached using bolts. The presenter notes the difficulty of aligning the bolts and tightening them. Once attached, it's confirmed that the lock mechanism works and the door can be unlocked. A potential issue is identified where an external key might not fit or turn if the internal key is in place.

The main battery for the smart lock is inserted. The control unit for the lock requires four AAA batteries. Upon powering on the device, it beeps, indicating it's ready for setup. The next step is to pair the lock with the Aqara app and HomeKit.

The presenter encounters significant issues trying to pair the lock with the Aqara Home app, experiencing blank screens and connection time-outs despite restarting the phone and the device. The problem is linked to scanning the wrong QR code; there are two, one for Matter integration (for HomeKit) and another for the Aqara app (Magic QR). The Matter QR code must be scanned first for HomeKit pairing.

The lock is successfully paired with HomeKit using the Matter QR code. From the HomeKit app, NFC unlocking cards and HomeKey can be set up. Reinstalling the Aqara Home app allows access to advanced settings like calibration, speed adjustments (for quieter operation), and managing fingerprints and users. HomeKit also allows adding users who will receive access cards.

A major problem arises due to the existing metal lock cylinder's incompatibility. When a key is inserted from both sides, the external key cannot rotate, making it impossible to unlock the door manually from outside if the smart lock fails. This necessitates replacing the lock cylinder with a compatible one, which took a week to find in Bulgaria due to specific national standards and required using one of Aqara's provided adapters.

A new, compatible lock cylinder is installed. The video then demonstrates the functionality of the Aqara U200 Smart Lock: manual locking/unlocking, NFC unlocking, fingerprint access, and HomeKey functionality with an Apple Watch. The presenter also clarifies the purpose of the two QR codes: one for HomeKit (bottom) and one for the Aqara app (top).

The presenter advises thorough research on door and lock compatibility before purchasing the Aqara U200 to avoid installation delays. It's also recommended to always carry a physical key for backup in case of smart lock malfunction or battery issues. The video concludes with a promise of future content on advanced Aqara app options.