Hello,
I’ve purchased a ZBT-2 over the holiday along with an Eve light switch. I followed the instructions and got the ZBT-2 connected to HA with the Thread firmware installed, and each of the integrations/addons appear as expected:
- Matter, Thread, OpenThread Border Router integrations
- Matter Server and OpenThread Border Router addons
In the Thread integration, I was able to get a new network using the OpenThread Border Router and can sync the credentials to my phone. The Eve device appears to be fully functional, in that I can manually toggle the switch and turn the associated bulb on and off without issue.
However, when I try to add the Eve light switch to HA, I get no further than “Connecting” and it gives up after several minutes. I’m using the HA companion app (iOS) – I go to devices, Add Integration, Add Matter Device, then scan the QR code from the light switch.
I have a flat network layout, with full IPv4 and IPv6 connectivity; no traffic is blocked or dropped anywhere within the LAN (or wifi). HA has only a single network connection. I can see mDNS traffic anywhere in the network without issue. The ZBT-2 is connected with the included USB extension cable and is positioned away from HA RPi and any other potential sources of interference. It is probably no more than 3-4 meters from the light switch, with one wall separating them. I’ve tried adding the device while standing right next to the light switch and a bit of distance away, trying to rule out any bluetooth issues.
I do see a few concerning messages in the OTBR addon logs, though they haven’t yet repeated since my last addon restart last night, even after additional pairing attempts (both last night and this morning).
s6-rc: info: service legacy-services successfully started
00:00:27.164 [N] Mle-----------: RLOC16 5400 -> fffe
00:00:27.841 [N] Mle-----------: Attach attempt 1, AnyPartition reattaching with Active Dataset
00:00:34.341 [N] RouterTable---: Allocate router id 21
00:00:34.341 [N] Mle-----------: RLOC16 fffe -> 5400
00:00:34.342 [N] Mle-----------: Role detached -> leader
00:00:34.342 [N] Mle-----------: Partition ID 0x2ceff1d4
[NOTE]-BBA-----: BackboneAgent: Backbone Router becomes Primary!
00:00:35.854 [W] P-RadioSpinel-: Error processing result: NoAddress
00:00:35.854 [W] P-RadioSpinel-: Error waiting response: NoAddress
00:00:36.304 [W] DuaManager----: Failed to perform next registration: NotFound
00:00:45.515 [W] SrpServer-----: Failed to handle DNS message: Drop
00:00:48.476 [W] SrpServer-----: Failed to handle DNS message: Drop
00:00:54.326 [W] SrpServer-----: Failed to handle DNS message: Drop
00:03:00.961 [W] SrpServer-----: Failed to handle DNS message: Drop
00:03:03.768 [W] SrpServer-----: Failed to handle DNS message: Drop
00:03:08.148 [W] SrpServer-----: Failed to handle DNS message: Drop
00:14:59.232 [W] P-RadioSpinel-: Error processing result: NoAddress
00:14:59.232 [W] P-RadioSpinel-: Error waiting response: NoAddress
00:15:01.010 [W] SrpServer-----: Failed to handle DNS message: Drop
00:15:03.578 [W] SrpServer-----: Failed to handle DNS message: Drop
00:15:09.453 [W] SrpServer-----: Failed to handle DNS message: Drop
I also see this in the Matter addon logs; it doesn’t repeat unless restarted:
2026-01-04 14:12:34.242 (Dummy-2) CHIP_ERROR [chip.native.DIS] Failed to advertise records: src/inet/UDPEndPointImplSockets.cpp:417: OS Error 0x02000065: Network is unreachable
2026-01-04 14:12:34.246 (Dummy-2) CHIP_ERROR [chip.native.DL] Long dispatch time: 120 ms, for event type 2
Any suggestions for what to try next, or other places to check for potential issues?