Today I tried switching my SLZB-06 from being used solely as an OpenThread Border Router to using it for both Thread + Bluetooth Proxy by flashing it with the official SMLIGHT YAML configuration.
Home Assistant recognizes the device as a Bluetooth Proxy, but I’m running into issues getting it to work with the OpenThread Border Router (OTBR) add-on.
I understand that the add-on expects a UART device, and previously I would just select any available device from the list. However, now that the ESPHome firmware is flashed, the add-on does not seem to accept it and fails to start.
Has anyone experienced similar issues—or even better, found a solution?
Any help is greatly appreciated.
OTBR Addon Log
[23:03:24] INFO: The otbr-web is disabled.
[23:03:24] INFO: Enabled socat-otbr-tcp.
s6-rc: info: service socat-otbr-tcp: starting
s6-rc: info: service mdns: starting
s6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service mdns successfully started
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service banner: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
[23:03:24] INFO: Starting mDNS Responder...
Default: mDNSResponder (Engineering Build) (Jan 14 2025 21:04:03) starting
[23:03:24] INFO: Starting socat TCP client for OTBR daemon...
-----------------------------------------------------------
Add-on: OpenThread Border Router
OpenThread Border Router add-on
-----------------------------------------------------------
Add-on version: 2.13.0
You are running the latest version of this add-on.
s6-rc: info: service socat-otbr-tcp successfully started
System: Home Assistant OS 15.2 (amd64 / qemux86-64)
Home Assistant Core: 2025.4.4
Home Assistant Supervisor: 2025.05.3
-----------------------------------------------------------
Please, share the above information when looking for help
or support in, e.g., GitHub, forums or the Discord chat.
-----------------------------------------------------------
s6-rc: info: service banner successfully started
s6-rc: info: service universal-silabs-flasher: starting
[23:03:25] INFO: Flashing firmware is disabled
s6-rc: info: service universal-silabs-flasher successfully started
s6-rc: info: service otbr-agent: starting
[23:03:26] INFO: Starting otbr-agent...
[NOTE]-AGENT---: Running 0.3.0-b067e5ac-dirty
[NOTE]-AGENT---: Thread version: 1.3.0
[NOTE]-AGENT---: Thread interface: wpan0
[NOTE]-AGENT---: Radio URL: spinel+hdlc+uart:///tmp/ttyOTBR?uart-baudrate=460800&uart-init-deassert
[NOTE]-AGENT---: Radio URL: trel://enp0s18
[NOTE]-ILS-----: Infra link selected: enp0s18
[INFO]-RCP_HOS-: OpenThread log level changed to 5
tiocmbic: Inappropriate ioctl for device
49d.21:10:44.036 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:0, cmd:RESET
49d.21:10:44.036 [D] P-SpinelDrive-: Waiting response: key=0
49d.21:10:46.036 [W] P-SpinelDrive-: Wait for response timeout
49d.21:10:46.037 [I] P-SpinelDrive-: co-processor self reset successfully
49d.21:10:46.037 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.21:10:46.037 [D] P-SpinelDrive-: Waiting response: key=1
49d.21:10:48.038 [W] P-SpinelDrive-: Wait for response timeout
49d.21:10:48.038 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.21:10:48.038 [D] P-SpinelDrive-: Waiting response: key=1
49d.21:10:50.041 [W] P-SpinelDrive-: Wait for response timeout
49d.21:10:50.041 [C] Platform------: Init() at spinel_driver.cpp:83: Failure
49d.21:10:50.041 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.21:10:50.041 [D] P-SpinelDrive-: Waiting response: key=1
49d.21:10:52.043 [W] P-SpinelDrive-: Wait for response timeout
[23:03:34] WARNING: otbr-agent exited with code 1 (by signal 0).
...
[23:03:34] INFO: mDNS ended with exit code 4 (signal 0)...
s6-rc: info: service mdns successfully stopped
