What causes the node state to become disabled?

[rprj]

Hello,

I have some full-thread devices that have been running for days, but sometimes their node state becomes disabled. This happens to some intermittently, but for some devices, they never recover back to either child, router, or leader state. What could be some of the causes for this?

[jwhui]

By "disabled", I assume you are referring to OT_DEVICE_ROLE_DISABLED.

OpenThread does not enter OT_DEVICE_ROLE_DISABLED on its own, except on initialization. As a result, either some application code is calling an API to disable OpenThread or the device is unexpectedly resetting.

Increasing the log level and capturing the logs can help determine the cause.