#HA Companion App "Can't reach device" while adding Matter device.

1 messages · Page 1 of 1 (latest)

ember tusk
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I've confirmed that mdns broadcasts can be sent/received between each container: home-assistant, openthread-border-router, matter, and the integrations are setup in HA. But when I attempt to add a matter device with my android phone, I get "Can't reach device"?

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Topology:

Network
  WIFI
    Android
      Home Assistant App
  Server
    MACVLAN
      HA Container
      Openthread Border Router Container
      Matter container

MDNS works between:

  • android TO containers
  • containers TO containers
  • containers TO android

So communication should be enabled.

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hmm. I might''ve reset the border router- resetting credentials...
nope.

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matter-1  | 2025-10-20 19:31:33.912 (Dummy-2) CHIP_ERROR [chip.native.DIS] Packet too small for mDNS data: 10 bytes
matter-1  | 2025-10-20 19:47:07.717 (Dummy-2) CHIP_ERROR [chip.native.DIS] Packet too small for mDNS data: 10 bytes
matter-1  | 2025-10-20 19:47:19.984 (Dummy-2) CHIP_ERROR [chip.native.DIS] Packet too small for mDNS data: 10 bytes
ember tusk
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I've run out of ideas.
The HA companion app just seems to get stuck and I don't know why.

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Tried placing it directly next to the threat radio to make sure the device has signal... Same thing occurs.

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I can't interpret the openthread-border-router logs

ember tusk
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openthread-border-router-1  | Oct 20 23:16:11 567192cd1f6f otbr-web[71]: [CRIT]-WEB-----: Stopping web server

oop., although something is still listening on port 8081

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let's see if I can get useful information out of ADB logs

ember tusk
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It looks like the Thread integration in HA keeps losing sight of the Border Router.
It shows up when I restart openthread-border-router, but disappears a bit later.

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I don't see any obvious failures. Fails silently.

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I see some radio messages pass by and the openthread-border-router web interface shows a child node, hwich I think is this device...

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but home assistant seems to be disconnected from border router then