A conditional native matter route is documented for Smart Lock U400 and Home Assistant. It requires the exact model, region, controller and feature checks below; no hands-on pair test is recorded.
Short answer and model scope
The first decision is whether the product in hand matches this researched model and US variant. A shared marketing name can hide another radio, electrical rating or firmware path. The table marks what this record identifies and what still needs checking on the package.
| Check | Recorded value |
|---|---|
| Model label | DL-D06E, DL-D16E, DL-D06D, DL-D16D, DL-D17D, DL-D15D |
| US variant | Exact retail SKU not fully resolved |
| Availability | Documented Product |
| Physical pairing test | None |
| Matter Transport | Thread |
How the connection is supposed to work
The documented route is a native Matter accessory over Thread to a Home Assistant Matter controller. A Wi-Fi route and a Thread route have different network requirements. A compatible controller does not by itself prove that the requested feature appears in the app.
| Path element | What this record says |
|---|---|
| Accessory | Smart Lock U400 |
| Connection method | Native Matter |
| Target | Home Assistant |
| Research result | Conditional, with requirements below |
Requirements to check before pairing
| Requirement | Why it matters |
|---|---|
| Target Platform Supported Device Type | The target app must support this Matter device type, not just Matter generally. |
| Compatible Product Firmware | Confirm the installed product firmware against the current manufacturer support page. |
| Reachable Local Ipv6 Network | The accessory and controller must be reachable on the home IP network, including IPv6 discovery. |
| Home Assistant Matter Controller | Home Assistant needs its supported Matter Server and controller environment. |
| Thread Border Router For Persistent Smart Home Operation | A supported Thread border router is needed for a persistent Thread smart-home path. |
| Firmware minimum | No reliable minimum is recorded here. Check the installed version and current support note. |
If the device or hub is from another region, stop and verify the radio band, voltage, plug or installation requirements separately. A US-targeted record is not evidence for an EU variant.
Feature scope
| Function | Status |
|---|---|
| Lock | Documented only as part of this conditional route |
| Unlock | Documented only as part of this conditional route |
This list is a ceiling on what the current evidence names, not proof that every listed action works in your home. Features absent from the list—including vendor scenes, energy data, video, keys or advanced automations—remain unverified unless another source establishes them.
Limits and a safe setup sequence
- UWB unlocking requirements and Apple home key are not equivalent to Matter lock control.
- Manufacturer documentation is not an on-site interoperability test.
- Vendor-specific features require separate evidence.
- Check the exact printed model or hardware version and US electrical or radio variant.
- Confirm the selected controller or bridge has the required role and current supported firmware.
- Use the manufacturer’s current pairing flow, keeping the private setup code on your device.
- Test the specific documented function before adding automations or resetting an existing setup.
Another platform is a separate decision
The separate Apple Home record uses Native Matter and has its own controller and feature requirements. Do not carry a result from Home Assistant over to that ecosystem without checking its route.
Official documentation
- Aqara — U400 features and model variants Reviewed 2026-10-30
- Home Assistant — Matter integration, network and controller requirements Reviewed 2026-10-30
This path was reviewed 2026-10-30. A source link supports the stated route within its scope; it is not a physical test, stock check or guarantee of your current firmware.