Open thread border router crashing repeatedly

Configuration Matter/Thread
1

Hi,

I am still quite new to home assistant. But since I have a technical background, I was able to solve my issues with the help of google and reading forum posts by myself in the past.
However, since yesterday I am running into issues I can’t figure out myself. I, on one hand updated home assistant/core to the latest versions and I added four Tado X thermostats to matter on the other hand. Since then I am constantly facing crashes of the Open Thread Border Router.
For the moment I can’t really figure out the root cause, since I changed more than one thing on the system. What I also observe is that the thermostats which are further away, every now and then become unavailable, probably due to weak signal strength. However, even if undesirable, I would not expect that this should be the root cause for the crashes. The add-on should be resilient against such behavior.
I have a lengthy log file, which might contribute to find the issue but I don’t see a possibility to attach it to this post.

1 Like
2

You should start by posting logs of the issue

3

So the failure cascade usually looks like this:

00:02:22.106 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:0, cmd:PROP_VALUE_IS, key:STREAM_RAW, len:22, rssi:-89 ...
00:02:22.106 [D] P-SpinelDrive-: ... noise:-128, flags:0x0000, channel:15, lqi:255, timestamp:10648296763, rxerr:0
00:02:22.526 [W] P-RadioSpinel-: Wait for response timeout
00:02:22.526 [W] P-RadioSpinel-: RCP failure detected
00:02:22.526 [W] P-RadioSpinel-: Trying to recover (1/2)
00:02:22.526 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_SET, key:PHY_ENABLED, enabled:1
00:02:22.526 [D] P-RadioSpinel-: Wait response: tid=1 key=32
00:02:22.537 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_IS, key:PHY_ENABLED, enabled:1
00:02:22.537 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:2, cmd:PROP_VALUE_SET, key:MAC_15_4_PANID, panid:0x163e
00:02:22.537 [D] P-RadioSpinel-: Wait response: tid=2 key=54
00:02:22.547 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:2, cmd:PROP_VALUE_IS, key:MAC_15_4_PANID, panid:0x163e
00:02:22.547 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:3, cmd:PROP_VALUE_SET, key:MAC_15_4_SADDR, saddr:0x6c00
00:02:22.547 [D] P-RadioSpinel-: Wait response: tid=3 key=53
00:02:22.558 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:3, cmd:PROP_VALUE_IS, key:MAC_15_4_SADDR, saddr:0x6c00
00:02:22.558 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:4, cmd:PROP_VALUE_SET, key:MAC_15_4_LADDR, laddr:deab36b616fd175b
00:02:22.558 [D] P-RadioSpinel-: Wait response: tid=4 key=52
00:02:22.569 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:4, cmd:PROP_VALUE_IS, key:MAC_15_4_LADDR, laddr:deab36b616fd175b
00:02:22.569 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:5, cmd:PROP_VALUE_SET, key:PHY_CHAN, channel:15
00:02:22.569 [D] P-RadioSpinel-: Wait response: tid=5 key=33
00:02:22.581 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:5, cmd:PROP_VALUE_IS, key:PHY_CHAN, channel:15
00:02:22.581 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:6, cmd:PROP_VALUE_SET, key:RCP_MAC_KEY, keyIdMode:8, keyId:3, prevKey:***, currKey:***, nextKey:***
00:02:22.581 [D] P-RadioSpinel-: Wait response: tid=6 key=2048
00:02:22.591 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:6, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:OK
00:02:22.591 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:7, cmd:PROP_VALUE_SET, key:RCP_MAC_FRAME_COUNTER, counter:598077
00:02:22.591 [D] P-RadioSpinel-: Wait response: tid=7 key=2049
00:02:22.602 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:7, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:OK
00:02:22.602 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:8, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_SHORT_ADDRESSES, saddr:0x6c03 
00:02:22.602 [D] P-RadioSpinel-: Wait response: tid=8 key=4868
00:02:22.613 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:8, cmd:PROP_VALUE_INSERTED, key:MAC_SRC_MATCH_SHORT_ADDRESSES, saddr:0x6c03 
00:02:22.613 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:9, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:e21cff298298b772 
00:02:22.613 [D] P-RadioSpinel-: Wait response: tid=9 key=4869
00:02:22.624 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:9, cmd:PROP_VALUE_INSERTED, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:e21cff298298b772 
00:02:22.624 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:10, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:bacbaf798b9af2ca 
00:02:22.624 [D] P-RadioSpinel-: Wait response: tid=10 key=4869
00:02:22.636 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:10, cmd:PROP_VALUE_INSERTED, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:bacbaf798b9af2ca 
00:02:22.636 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:11, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:62a98175d4b923cb 
00:02:22.636 [D] P-RadioSpinel-: Wait response: tid=11 key=4869
00:02:22.646 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:11, cmd:PROP_VALUE_INSERTED, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:62a98175d4b923cb 
00:02:22.646 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:12, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:ce2b9aa6fa620171 
00:02:22.646 [D] P-RadioSpinel-: Wait response: tid=12 key=4869
00:02:22.657 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:12, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:02:22.657 [W] P-RadioSpinel-: Error processing result: NoBufs
00:02:22.657 [W] P-RadioSpinel-: Error waiting response: NoBufs
00:02:22.658 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:13, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:ce2b9aa6fa620171 
00:02:22.658 [D] P-RadioSpinel-: Wait response: tid=13 key=4869
00:02:22.668 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:13, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:02:22.668 [W] P-RadioSpinel-: Error processing result: NoBufs
00:02:22.668 [W] P-RadioSpinel-: Error waiting response: NoBufs
00:02:22.668 [C] Platform------: RestoreProperties() at radio_spinel.cpp:2218: Failure
00:02:22.669 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:14, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:ce2b9aa6fa620171 
00:02:22.669 [D] P-RadioSpinel-: Wait response: tid=14 key=4869
00:02:22.679 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:14, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:02:22.679 [W] P-RadioSpinel-: Error processing result: NoBufs
00:02:22.679 [W] P-RadioSpinel-: Error waiting response: NoBufs
[12:54:27] WARNING: e[33motbr-agent exited with code 1 (by signal 0).e[0m
otbr-ingress-deny-src
otbr-ingress-deny-src-swap
otbr-ingress-allow-dst
otbr-ingress-allow-dst-swap
[12:54:27] INFO: e[32mOTBR firewall teardown completed.e[0m
s6-rc: info: service legacy-services: stopping
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service otbr-agent-rest-discovery: stopping
s6-rc: info: service otbr-agent-rest-discovery successfully stopped
s6-rc: info: service otbr-agent-configure: stopping
s6-rc: info: service otbr-agent-configure successfully stopped
s6-rc: info: service otbr-agent: stopping
s6-rc: info: service otbr-agent successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service banner: stopping
s6-rc: info: service socat-otbr-tcp: stopping
s6-rc: info: service mdns: stopping
2025/11/09 12:54:27 socat[79] W exiting on signal 15
s6-rc: info: service banner successfully stopped
Default: mDNSResponder (Engineering Build) (Oct 28 2025 07:42:47) stopping
s6-rc: info: service socat-otbr-tcp successfully stopped
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped
[12:54:27] INFO: e[32mmDNS ended with exit code 4 (signal 0)...e[0m
s6-rc: info: service mdns successfully stopped
[12:54:31] INFO: e[32mThe otbr-web is disabled.e[0m
[12:54:31] INFO: e[32mEnabled socat-otbr-tcp.e[0m

Then the OTBR add-on tries to restart and runs into the next crash

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
[12:54:31] INFO: e[32mStarting mDNS Responder...e[0m
Default: mDNSResponder (Engineering Build) (Oct 28 2025 07:42:47) starting
s6-rc: info: service legacy-cont-init successfully started
[12:54:31] INFO: e[32mStarting socat TCP client for OTBR daemon...e[0m

e[34m-----------------------------------------------------------e[0m
e[34m Add-on: OpenThread Border Routere[0m
e[34m OpenThread Border Router add-one[0m
e[34m-----------------------------------------------------------e[0m
e[34m Add-on version: 2.15.0e[0m
s6-rc: info: service socat-otbr-tcp successfully started
e[32m You are running the latest version of this add-on.e[0m
e[34m System: Home Assistant OS 16.3  (aarch64 / yellow)e[0m
e[34m Home Assistant Core: 2025.11.1e[0m
e[34m Home Assistant Supervisor: 2025.11.1e[0m
e[34m-----------------------------------------------------------e[0m
e[34m Please, share the above information when looking for helpe[0m
e[34m or support in, e.g., GitHub, forums or the Discord chat.e[0m
e[34m-----------------------------------------------------------e[0m
s6-rc: info: service banner successfully started
s6-rc: info: service otbr-agent: starting
[12:54:33] INFO: e[32mMigrating OTBR settings if needed...e[0m
2025-11-09 12:54:33 homeassistant asyncio[241] DEBUG Using selector: EpollSelector
2025-11-09 12:54:33 homeassistant zigpy.serial[241] DEBUG Opening a serial connection to '/tmp/ttyOTBR' (baudrate=460800, xonxoff=False, rtscts=False)
2025-11-09 12:54:33 homeassistant zigpy.serial[241] DEBUG Connection made: SerialTransport(<_UnixSelectorEventLoop running=True closed=False debug=False>, <universal_silabs_flasher.spinel.SpinelProtocol object at 0x7fa3910210>, Serial<id=0x7fa3690af0, open=True>(port='/tmp/ttyOTBR', baudrate=460800, bytesize=8, parity='N', stopbits=1, timeout=0, xonxoff=False, rtscts=False, dsrdtr=False))
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Sending frame SpinelFrame(header=SpinelHeader(transaction_id=3, network_link_id=0, flag=2), command_id=<CommandID.PROP_VALUE_GET: 2>, data=b'\x08')
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Sending data b'~\x83\x02\x08\xbc\x9a~'
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Decoded HDLC frame: HDLCLiteFrame(data=b'\x83\x06\x08\xbc\x8d~\xff\xfe#\x9e<')
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Parsed frame SpinelFrame(header=SpinelHeader(transaction_id=3, network_link_id=0, flag=2), command_id=<CommandID.PROP_VALUE_IS: 6>, data=b'\x08\xbc\x8d~\xff\xfe#\x9e<')
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Decoded HDLC frame: HDLCLiteFrame(data=b'\x80\x06q\x16\x00k\x98\xfc>\x16\x00l\x05l\rZu\x00\x00\x03\x04\x1e\t\xdd\xc8\x8a!\xb2\x80\x00\x00\n\x00\x0f\xff.\xf7\x16{\x02\x00\x00\x00\x01\x00\x00\x05\x00\x03q\xb2\x08\x00')
2025-11-09 12:54:33 homeassistant universal_silabs_flasher.spinel[241] DEBUG Parsed frame SpinelFrame(header=SpinelHeader(transaction_id=0, network_link_id=0, flag=2), command_id=<CommandID.PROP_VALUE_IS: 6>, data=b'q\x16\x00k\x98\xfc>\x16\x00l\x05l\rZu\x00\x00\x03\x04\x1e\t\xdd\xc8\x8a!\xb2\x80\x00\x00\n\x00\x0f\xff.\xf7\x16{\x02\x00\x00\x00\x01\x00\x00\x05\x00\x03q\xb2\x08\x00')
2025-11-09 12:54:33 homeassistant zigpy.serial[241] DEBUG Waiting for serial port to close
2025-11-09 12:54:33 homeassistant zigpy.serial[241] DEBUG Connection lost: None
Adapter settings file /data/thread/0_bc8d7efffe239e3c.data is the most recently used, skipping
[12:54:33] INFO: e[32mStarting otbr-agent...e[0m
[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://end0
[NOTE]-ILS-----: Infra link selected: end0
tiocmbic: Inappropriate ioctl for device
[INFO]-RCP_HOS-: OpenThread log level changed to 5
49d.20:00:25.888 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:0, cmd:RESET
49d.20:00:25.888 [D] P-SpinelDrive-: Waiting response: key=0
49d.20:00:25.888 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:0, cmd:PROP_VALUE_IS, key:STREAM_RAW, len:22, rssi:-91 ...
49d.20:00:25.888 [D] P-SpinelDrive-: ... noise:-128, flags:0x0000, channel:15, lqi:255, timestamp:10655051590, rxerr:0
49d.20:00:25.888 [W] P-SpinelDrive-: Error processing frame: Drop
49d.20:00:25.898 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:0, cmd:PROP_VALUE_IS, key:STREAM_RAW, len:22, rssi:-88 ...
49d.20:00:25.898 [D] P-SpinelDrive-: ... noise:-128, flags:0x0000, channel:15, lqi:255, timestamp:10655121458, rxerr:0
49d.20:00:25.898 [W] P-SpinelDrive-: Error processing frame: Drop
49d.20:00:27.890 [W] P-SpinelDrive-: Wait for response timeout
49d.20:00:27.890 [I] P-SpinelDrive-: co-processor self reset successfully
49d.20:00:27.890 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.20:00:27.890 [D] P-SpinelDrive-: Waiting response: key=1
49d.20:00:29.891 [W] P-SpinelDrive-: Wait for response timeout
49d.20:00:29.891 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.20:00:29.891 [D] P-SpinelDrive-: Waiting response: key=1
49d.20:00:31.893 [W] P-SpinelDrive-: Wait for response timeout
49d.20:00:31.893 [C] Platform------: Init() at spinel_driver.cpp:83: Failure
49d.20:00:31.893 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:1, cmd:PROP_VALUE_GET, key:PROTOCOL_VERSION
49d.20:00:31.893 [D] P-SpinelDrive-: Waiting response: key=1
49d.20:00:33.895 [W] P-SpinelDrive-: Wait for response timeout
[12:54:41] WARNING: e[33motbr-agent exited with code 1 (by signal 0).e[0m
otbr-ingress-deny-src
otbr-ingress-deny-src-swap
otbr-ingress-allow-dst
otbr-ingress-allow-dst-swap
[12:54:41] INFO: e[32mOTBR firewall teardown completed.e[0m
s6-svlisten1: fatal: /run/s6-rc/servicedirs/otbr-agent failed permanently or its supervisor died
s6-rc: warning: unable to start service otbr-agent: command exited 1
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service banner: stopping
s6-rc: info: service socat-otbr-tcp: stopping
s6-rc: info: service mdns: stopping
/run/s6/basedir/scripts/rc.init: warning: s6-rc failed to properly bring all the services up! Check your logs (in /run/uncaught-logs/current if you have in-container logging) for more information.
/run/s6/basedir/scripts/rc.init: fatal: stopping the container.
Default: mDNSResponder (Engineering Build) (Oct 28 2025 07:42:47) stopping
2025/11/09 12:54:41 socat[79] W exiting on signal 15
s6-rc: info: service banner successfully stopped
s6-rc: info: service socat-otbr-tcp successfully stopped
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped
[12:54:41] INFO: e[32mmDNS ended with exit code 4 (signal 0)...e[0m
s6-rc: info: service mdns successfully stopped
[12:54:45] INFO: e[32mThe otbr-web is disabled.e[0m
[12:54:45] INFO: e[32mEnabled socat-otbr-tcp.e[0m

This repeats a few times until the module is not trying to restart anymore

4

I am in a similar boat…my OTBR crashes all the time… I get ghost instances occurring …I am on the “latest” everything… Matter over thread is a total and utter bloody shambles.

5

What firmware have you installed in your dongle?
You need ot_rcp firmware ( silabs-firmware-builder/firmware_builds/zbdonglee at b58bd0396a0289e4822a66b8c3de6b8843d78c2a · darkxst/silabs-firmware-builder · GitHub )

6

Well mine is an SLBZ-06 I’ve just upgraded to v3.1.0

7

I know people will be trying to help. And very appreciative. All I want is stability :slightly_smiling_face:

8

How did this startet with you? Since I did several changes at once, I can’t pinpoint this to the HA update or the new Matter devices.

I am using a SLZB-MR3 with HA yellow, if this contributes for narrowing down the root cause. Thread is running on Radio 1 [EFR32MG24.].

9

How did it “start”… it has never felt stable… some days its ok… the connection lasts more than 24hrs… other days it drops in less than a minute… they all told me on another “thread” here… (yes pun intended !) it was because I hadn’t ugraded to IPv6… I did that and it was stable a few days… then KABOOM… unstable (again)… I have a couple of Eve plugs and a Nanolight Downlight (which I have managed to sync …finally to an Amazon Echo…after unsuccessfully using the HA iPhone app )… but not to OTBR… there are way to many moving software and network “parts”… for me to confidently buy more thread devices… the stuff I am “trialling” now (IMO it’s still alpha) is simply never going to be critical… it’s just too darn unreliable. Stick with zigbee 3.0 until they get things stable. Big Tech has control. Just MO

10

Can you guys try to reflash SLZB with Matter-over-thread firmware version 20241105 ?

11

Okay, the situation is a little different for me. My OTBR was fine for several weeks, when I integrated my smart lock device. Later on I added two smart thermostats of different manufacturers for testing purposes, which still was fine for about two weeks.
And then HA update + a few more thermostats => OTBR crashing

12

Where do I get an older FW file? It only shows me the latest, which is also installed:

grafik
grafik1519×462 28.4 KB

13

I just found the SLZB logs, which make me doubting the radio is the issue:

[09.11.2025 12:52:02] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:54:28] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:54:31] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:54:41] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:54:46] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:54:52] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:54:56] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:55:02] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:55:07] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:55:13] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:55:18] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:55:24] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:55:27] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:55:34] SocketServer | [EFR32MG24] Client disconnected, id: 0
[09.11.2025 12:55:37] SocketServer | [EFR32MG24] New client, id: 0
[09.11.2025 12:55:43] SocketServer | [EFR32MG24] Client disconnected, id: 0
14

Also can you try by using the dongle from USB port and not ethernet?
Could be an issue with soCat. Networked serial port depending of device protocol can cause many issues.

15

Moved over to USB. Same pattern as before:

00:05:24.779 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:0, cmd:PROP_VALUE_IS, key:STREAM_RAW, len:22, rssi:-80 ...
00:05:24.779 [D] P-SpinelDrive-: ... noise:-128, flags:0x0010, channel:15, lqi:191, timestamp:543798834, rxerr:0
00:05:24.784 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:13, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:05:24.784 [W] P-RadioSpinel-: Error processing result: NoBufs
00:05:24.784 [W] P-RadioSpinel-: Error waiting response: NoBufs
00:05:24.784 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:14, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:cae0b4857a0470f5 
00:05:24.784 [D] P-RadioSpinel-: Wait response: tid=14 key=4869
00:05:24.798 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:14, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:05:24.798 [W] P-RadioSpinel-: Error processing result: NoBufs
00:05:24.798 [W] P-RadioSpinel-: Error waiting response: NoBufs
00:05:24.798 [C] Platform------: RestoreProperties() at radio_spinel.cpp:2218: Failure
00:05:24.798 [D] P-SpinelDrive-: Sent spinel frame, flg:0x2, iid:0, tid:15, cmd:PROP_VALUE_INSERT, key:MAC_SRC_MATCH_EXTENDED_ADDRESSES, extaddr:cae0b4857a0470f5 
00:05:24.798 [D] P-RadioSpinel-: Wait response: tid=15 key=4869
00:05:24.808 [D] P-SpinelDrive-: Received spinel frame, flg:0x2, iid:0, tid:15, cmd:PROP_VALUE_IS, key:LAST_STATUS, status:NOMEM
00:05:24.808 [W] P-RadioSpinel-: Error processing result: NoBufs
00:05:24.808 [W] P-RadioSpinel-: Error waiting response: NoBufs
[10:05:39] WARNING: e[33motbr-agent exited with code 1 (by signal 0).e[0m
otbr-ingress-deny-src
otbr-ingress-deny-src-swap
otbr-ingress-allow-dst
otbr-ingress-allow-dst-swap
[10:05:39] INFO: e[32mOTBR firewall teardown completed.e[0m
s6-rc: info: service legacy-services: stopping
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service otbr-agent-rest-discovery: stopping
s6-rc: info: service otbr-agent-rest-discovery successfully stopped
s6-rc: info: service otbr-agent-configure: stopping
s6-rc: info: service otbr-agent-configure successfully stopped
s6-rc: info: service otbr-agent: stopping
s6-rc: info: service otbr-agent successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service banner: stopping
s6-rc: info: service mdns: stopping
Default: mDNSResponder (Engineering Build) (Oct 28 2025 07:42:47) stopping
s6-rc: info: service banner successfully stopped
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped
[10:05:39] INFO: e[32mmDNS ended with exit code 4 (signal 0)...e[0m
s6-rc: info: service mdns successfully stopped

I’ll try to figure out where to get the older FW version

16

I just noticed my OTBR integration kept restarting (I have Google Nest also that likely stood in for the thread network). I went to ‘System/Hardware’ chose the dongle that is assigned to thread (ZBT-1 in my case), clicked ‘Configure’, Migrate thread to new adapter. It updated the adapter and restarted the OTBR integration and is now stable for me.

17

Not sure why, but it seems that the OTBR is setting up several parameters to the SLZB, and eventually the SLZB is returning an error code saying that it has run out of memory (don’t know if its eprom, or RAM). After that (rebooting OTBR), it seems the OTBR doesn’t like anything sent back from the SLZB or doesn’t get anything back at all.

18

Update:

Since updating the SLZB-MR3 to Version 3.1.3 last week the OTBR is running without crashes since more than 3 days. Seems that the FW update solved the issue.