I’m trying to set up OTBR on my HA instance (running on a VM in Synology), with a SLZB-06M connected via Ethernet (PoE).
OTBR seems to be starting correctly (I have one border router showing in the Threads integration), and HA seems to be set up with IPv6
When I try adding a device (Aquara FP300) I always end up with “Your device requires a Thread border router”
I see the following log in OTBR repeated many times during/after the connection attempt
00:01:21.299 [W] P-HdlcIntface-: Error decoding hdlc frame: Parse
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Add-on: OpenThread Border Router
OpenThread Border Router add-on
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Add-on version: 2.15.1
You are running the latest version of this add-on.
s6-rc: info: service socat-otbr-tcp successfully started
System: Home Assistant OS 16.3 (amd64 / qemux86-64)
Home Assistant Core: 2025.11.2
Home Assistant Supervisor: 2025.11.4
Model: SLZB-06M
Radio Core
CPU model: EFR32MG21 ESP32
CPU cores and clock: 1 @ 80MHz 2 @ 240 Mhz
Flash memory: 768 kB 16Mb
RAM memory: 96 Kb 119/295KiB
Largest free block: - 107KiB
SoC temperature: 38.28°C 39.44°C
Firmware version: 20241105 v3.1.3
Latest FW check: 22/11/2025 22/11/2025