Aqara Smart Lock U400
Firmware actively maintained: latest certified update on November 2, 2026
Thread border router required. This device uses Thread and needs a Thread border router, for example a HomePod, Apple TV, Nest Hub or Echo. Compare border routers →
Aqara Smart Lock U400 by Aqara: certified Matter device (Door lock). Radio: Thread. Matter 1.4.
Price comparison
No price comparison has been set up for this device yet.
Compatibility with smart home platforms
Whether the platform supports this device type (Door lock). This is an assessment based on the platforms’ lists, not a guarantee for every feature.
- Google HomeDevice type supported
- Amazon AlexaDevice type supported
- Apple Home *Device type usually supported
- SmartThings *Device type usually supported
- Home Assistant *Device type usually supported
This device uses Thread: the platform needs a Thread border router, for example a HomePod, Apple TV, Nest Hub or an Echo with Thread. Compare border routers →
Data as of 2026-10-28. Platforms keep adding support; check the manufacturer’s information before buying. Platforms marked * publish no list of their own, so the entries are based on reports.
Technical data
- Manufacturer
- Aqara
- Product type
- Door locks
- Device type
- Door lock
- Radio protocol
- Thread
- Matter version
- Matter 1.4
- Model number
- AD051
- First certified
- May 7, 2025
- Latest certification
- November 2, 2026
- Certificate ID
- CSA265I0MAT56536-24
- Vendor / product ID (VID/PID)
- 0x115F / 0x2804 (4447 / 10244)
Factory reset
General advice
- First remove the device in your smart home app (controller) so its pairing is deleted there.
- Reset the device as the manufacturer describes – often a reset button or a fixed sequence of power cycles. The exact sequence differs per device; use the manual.
- The device then starts in pairing mode. Set it up again with its QR code or setup code.
Resetting erases the device’s settings and assignments.
Manufacturer links
Update history (certified firmware versions)
4 certified versions, latest on November 2, 2026. New versions appear here automatically once they are listed in the certification database.
| Version | Certified on | Matter | Certificate ID | Download firmware |
|---|---|---|---|---|
| 3.1.1.4current | November 2, 2026 | 1.4 | CSA265I0MAT56536-24 | |
| 3110 | June 2, 2026 | 1.4 | CSA263LDMAT54065-24 | Download firmware (3.9 MB)SHA-256: PJ2a7CwGEJiS+rZjqma1yoplpg42JmVziROC+JXx+kU= |
| 3104 | December 16, 2025 | 1.4 | CSA25G1YMAT49048-24 | Download firmware (3.9 MB)SHA-256: bsCl0+E8ntp1LFKpJzfM7fUVFM4z7BlD7xPylbDRe2w= |
| 3100First certification | May 7, 2025 | 1.4 | CSA2523EMAT45456-24 |
The files are hosted by the manufacturer and only linked here (details and checksum from the CSA DCL). Matter devices usually update automatically through the manufacturer’s app; manual installation is only needed if the manufacturer provides for it. Use at your own risk.
Articles about this device
Source: Distributed Compliance Ledger of the Connectivity Standards Alliance (as of November 3, 2026). No guarantee.