Aqara Smart Thermostat W400
Only the initial certification so far (December 2, 2025), no update certified
Aqara Smart Thermostat W400 by Aqara: certified Matter device (Thermostat). Radio: Wi-Fi. Matter 1.4.
Price comparison
Compatibility with smart home platforms
Whether the platform supports this device type (Thermostat). 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
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
- Heating, cooling & water
- Device type
- Thermostat
- Radio protocol
- Wi-Fi
- Matter version
- Matter 1.4
- Model number
- AA012
- First certified
- December 2, 2025
- Certificate ID
- CSA25F5EMAT48816-50
- Vendor / product ID (VID/PID)
- 0x115F / 0x480E (4447 / 18446)
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)
One version is certified so far (since December 2, 2025). New versions appear here automatically.
| Version | Certified on | Matter | Certificate ID |
|---|---|---|---|
| 4.4.6 | December 2, 2025 | 1.4 | CSA25F5EMAT48816-50 |
Articles about this device
Source: Distributed Compliance Ledger of the Connectivity Standards Alliance (as of November 3, 2026). No guarantee.