U400 Door Lock small UWB... issue

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21

I had the same issue where UWB wasn’t responding — this setup resolved it:

• Use an Apple TV 4K (3rd generation) Wi-Fi + Ethernet as your Thread Border Router (TBR) and place it within ≤3m of the U400 (mine is directly above it).
• In Apple HomeKit, ensure this Apple TV is the active/primary TBR (avoid suboptimal TBR selection).
• Create a dedicated 2.4 GHz SSID with IPv6 (SLAAC) enabled on your router.
• Connect the Apple TV to Wi-Fi first, then plug in Ethernet (ensures stable backhaul while maintaining correct network association).
• If using Ubiquiti gear, deploy multiple wired APs (no mesh uplinks) for consistent RF coverage.

Also:
• Disable Auto-Lock in HomeKit (stateless timer-based)
• Configure Auto-Lock in Aqara Home instead — it’s state-aware and won’t lock when the door is open

22

Hi there, as this issue has already been resolved with our support team via email, we’ll be closing this topic on the forum as well. If you have any further questions or run into any other issues, please feel free to reply directly to our support email. Thanks for your support and understanding!