IKEA Myggbett offline for >24 hours

[schildbach]

Version

0.6.5/0.6.6

Node.js Version

22.22.2

Operating System

Docker

Issue Description

One of my IKEA Myggbett went offline yesterday and since then stayed offline. It's the first Thread device I ever commissioned and it was working well since January. It should have enough battery, because it went offline with 100% and also it is still responding to opening/closing my door via yellow blinking LED.

I rebooted both matterjs-server and Home Assistant since then, and also upgraded both: HA from 2026.4.x to 2026.5.x and matterjs-server from 0.6.5 to 0.6.6.

I'm attaching the debug logfile. I scanned it for issues but could not find any. There are 3 Myggbetts and the one in question is Node 10 @1:a. The others continue to work fine.

myggbett-on-0.6.6.txt

Steps to Reproduce

see above

Server Logs

see above

Device Information

IKEA Myggbett (door/window sensor)

Additional Context

No response

Pre-submission Checklist

• I am running an Alpha/Beta version of the Matter.js server
• I have included the complete server logs (not truncated)
• I have checked existing issues to avoid duplicates

[schildbach]

I tried pinging the device via HA but it is unsuccessful. No error in the log either:

matterjs-server-1  | 2026-05-07 13:48:04.102 DEBUG  WebSocketC~erHandler [0] WebSocket request {
matterjs-server-1  |     "message_id": "ba4cd0ba32e74242b964cc0eecdd9c40",
matterjs-server-1  |     "command": "ping_node",
matterjs-server-1  |     "args": {
matterjs-server-1  |       "node_id": 10
matterjs-server-1  |     }
matterjs-server-1  |   }
matterjs-server-1  | 2026-05-07 13:48:06.497 DEBUG  MessageExchange      New exchange « @1:32•328d⇵a418 protocol: 1 peerSess: 328d SAT: 4s SAI: 1s SII: 3.8s maxTrans: 5 MRP
matterjs-server-1  | 2026-05-07 13:48:06.497 DEBUG  MessageExchange      Message « for: I/ReportData id: @1:32•328d⇵a418✉0e5cda10 type: 0x1/0x5 reqAck size: 70 payload: 152600724c25d536011535012600f35baa9f370124020125030102240400182102c5081818153501260029b7dbda370124020225030504240400182502ba0f18181824ff0c18
matterjs-server-1  | 2026-05-07 13:48:06.501 DEBUG  PairedNode           @1:32 Trigger attribute update for 1.Thermostat.0 to 2245
matterjs-server-1  | 2026-05-07 13:48:06.501 DEBUG  WebSocketC~erHandler [0] Sending attribute_updated event for Node @1:32 1/513/0 2245
matterjs-server-1  | 2026-05-07 13:48:06.502 DEBUG  WebSocketC~erHandler [1] Sending attribute_updated event for Node @1:32 1/513/0 2245
matterjs-server-1  | 2026-05-07 13:48:06.504 DEBUG  PairedNode           @1:32 Trigger attribute update for 2.RelativeHumidityMeasurement.0 to 4026
matterjs-server-1  | 2026-05-07 13:48:06.504 DEBUG  WebSocketC~erHandler [0] Sending attribute_updated event for Node @1:32 2/1029/0 4026
matterjs-server-1  | 2026-05-07 13:48:06.504 DEBUG  WebSocketC~erHandler [1] Sending attribute_updated event for Node @1:32 2/1029/0 4026
matterjs-server-1  | 2026-05-07 13:48:06.505 DEBUG  MessageChannel       Message » for: I/StatusResponse status: Success(0x0) subId: d5254c72 attr: 2 backOff: 6.49s id: @1:32•328d⇵a418✉0ef70c80 type: 0x1/0x1 acked: 0e5cda10 reqAck size: 8 payload: 1524000024ff0d18
matterjs-server-1  | 2026-05-07 13:48:06.718 DEBUG  MessageExchange      Message « for: SC/StandaloneAck id: @1:32•328d⇵a418✉0e5cda11 type: 0x0/0x10 acked: 0ef70c80
matterjs-server-1  | 2026-05-07 13:48:07.105 INFO   Controller~ndHandler Pinging node @1:a on 1 addresses: fdc0:ce6d:ec8a:1:3157:c8d6:e306:d55b
matterjs-server-1  | 2026-05-07 13:48:07.107 DEBUG  Controller~ndHandler Pinging fdc0:ce6d:ec8a:1:3157:c8d6:e306:d55b
matterjs-server-1  | 2026-05-07 13:48:17.142 DEBUG  Controller~ndHandler Ping result for fdc0:ce6d:ec8a:1:3157:c8d6:e306:d55b: false
matterjs-server-1  | 2026-05-07 13:48:17.142 DEBUG  WebSocketC~erHandler [0] WebSocket response (ping_node) ba4cd0ba32e74242b964cc0eecdd9c40 { fdc0:ce6d:ec8a:1:3157:c8d6:e306:d55b: false }

[schildbach]

The Matterjs UI lists under Connections an RSSI value of -9 dBm, which should be excellent. However LQI is only 3 (of 255?) – but all my IKEA devices have exactly this value.

[schildbach]

I also tried cycling the battery – didn't help.

[Apollon77]

LQI is 0..3 ... so 3===best

[Apollon77]

In fact we would need more log to know whats up ... try to restart te server and then let is run 10 mins and grab 10k of logs (shoud be sufficient) and I can tell you maybe.
Or try to grab 10k logs before and see if they cover the time where the device was still online and then I look at that.

[codersaur]

I have five MYGGBETTs and one of them did this (possibly after an OTA firmware upgrade). Pressing the buttons did nothing, but removing the battery for 10s and replacing fixed it. I doubt this is matterjs-server issue, it's more like the device's network stack crashed.