openthread offline and can't communicate anymore

[Leo2442926161]

Dear all,

We are doing long-term stability testing, we found out that some our sensor will offline in Apple Podmini, I captured the log shows as below, could you take a look?

please see line 4120, the device began to offline at this moment, and it seems rejoin again and again, it only can recovery via reboot.

[05:42:12.917]收←◆ [DL] _OnPlatformEvent default: event->Type = 32769
[DL] _OnPlatformEvent 8001
DeviceEventCallback 32769
kThreadConnectivityChange
Result -1
openthread offline.txt

[jwhui]

It appears all the transmit failures are returning kErrorNoAck. This might indicate an issue with the radio driver itself.

A pcap file for analysis in Wireshark would provide more visibility.

[Leo2442926161]

I just captured the sniffers and uart logs.
Please see the time 11:23 and 11:43 from the logs.
The air congestion shoudn't be bad, but the device seems skip the attacj process due to CSMA-CA, do you have any idea?

I can't attach the pcapng directly, please rename the *.pcapng.txt to *.pcapng, thank you.
sensor attach capture.TXT
sensor attach capture2.TXT
sensor attach capture.pcapng.txt
sensor attach capture2.pcapng.txt

[jwhui]

In this case, the error being returned is kErrorChannelAccessFailure, which is different from your log in #8492 (comment).
These errors are typically generated by the radio driver. If the device is continuously receiving such errors when trying to transmit, but the errors go way after reboot, I would guess that this is an issue with the radio driver itself. I would reach out to the radio vendor for support.

[Leo2442926161]

Thank you Jwhui, the radio vendor is silicon labs, and the chip is EFR32MG24A020F1535

[jwhui]

Please reach out to Silicon Labs directly for support. Thanks.

[Leo2442926161]

okay, will do, thank you.