Aqara U400 smart lock
Locks · Security
5 reports: 3 say it works, 2 say it partly works.
Reported with 2 integrations: Matter, Aqara Devices (G3, G2H Pro, G410, G4, M3, M100, M200, FP2, FP300, A100, A100 Pro, Xingyao, and U200).
What people report
| Integration | In Home Assistant | In Apple Home | What they said | Source |
|---|---|---|---|---|
| Not named | Works | Works in Home UWB Apple Home Key unlocks on approach flawlessly | Popular lately; user reports flawless Home Key integrationSaved copyInstalled an Aqara U400 a couple weeks ago and the UWB integration with Apple HomeKey is flawless so far. Unlocks on approach just as I reach the door. Exactly what I’ve been waiting for in a smart lock! https://www.aqara.com/us/product/smart-lock-u400/ Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23. | Reddit comment · 2026-01 |
| Matter | Works | Recommended as full deadbolt replacement, works greatSaved copyNuki Lock for retrofit and Aqara U400 for full deadbolt replacement. I have both and they work great. Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23. | Reddit comment · 2026-03 | |
| Matter | Works Local | Matter over Thread, needs border router; UWB with iPhone; one needed a Thread repeater to stop dropoutsSaved copyI've had the Aqara U400 since it came out, and I really like it. I would highly recommend it to anyone with an iPhone because of the UWB feature. Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23. | Reddit comment · 2026-05 | |
| Matter | Partly works | Works in Home Works via HomeKit; UWB for Android awaits Aliro | iPhone UWB supported; Android UWB awaiting AliroSaved copyI'm Android too and I'm hanging out for locks with Aliro. This will enable UWB for Android (detects your phone approaching the door and unlocks for you as you reach the door). The U400 already supports it for iPhone and Aqara are supposedly going to incorporate Aliro (I assume with a firmware update). This article is Apple Centric but mentions a few upcoming locks that will have Aliro. I was excited about the Sense Pro but they are taking their sweet time. Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23. | Reddit comment · 2026-04 |
| Aqara Devices (G3, G2H Pro, G410, G4, M3, M100, M200, FP2, FP300, A100, A100 Pro, Xingyao, and U200) | Partly works Cloud | Experimental beta build reuses U200 support; PR still openSaved copySummary - provide initial cloud entities for U300 and U400 using the existing U200 trait layout, preserving U200/Lite behavior - collect bounded, asynchronous capability metadata and expose downloadable diagnostics without identifiers, credentials, trait values or raw errors - keep missing experimental traits unknown and document the testing workflow and limitations - prepare `v1.6.0-beta-u300-u400.1` for hardware testing; unlock-method events and charging-state entities remain deferred Related to #99. This PR does not claim full event support or verified hardware/control compatibility. ## … Excerpt saved from GitHub on 2026-10-23. | PR #100 · 2026-10 |
Each row is one report from a GitHub thread, an integration’s docs, or r/homeassistant. Check the date and the linked source before you buy.
In ReReHome
Once Home Assistant’s HomeKit Bridge shares it, this device reaches Apple Home as a HomeKit accessory behind your Home Assistant bridge, so ReReHome shows and controls it like any other.
Identifiers
| Brand | Aqara |
|---|---|
| Model | U400 |
| Category | Locks |
Also reported as
- Aqara Smart Lock U400
- Aqara U400 lock