Zigbee Task halts on Leave Request

[sjf]

Hi,

We have been working with an end device based on nRF52840 with nRF5_SDK_for_Thread_and_Zigbee_v4.0.0_dc7186b and FreeRtos

This device has some bindings already set to the coordinator.

When it receives a Leave Request from coordinator, the Zigbee Stack gets stucked on zb_address_reset() function. Because of that, the Zigbee task remains blocked for the rest of the time.

Which should be the reason to halt at this point and how this could be avoided?

Regards,

Santiago

[Marte Myrvold]

Hi Santiago,

I've started looking into your issue.

Is the project on the end-device based on one of the examples in our SDK? If so, which one? Is the leave request part of the program and thus on purpose? If that's the case, how are you doing the leave request?

Could you please perform a sniffer trace and upload the sniffer log here?

Best regards,

Marte

[sjf]

It was based on an end device example but it has many modifications form that template. 

Basically we create some cluster bindings from the end device to the coordinator automatically once connected for the first time.

When the coordinator wants to remove the child, it sends a leave request (zdo_mgmt_leave_req()) with the following data:

p_req->dst_addr = <end device short address>

p_req->device_address = <end device ieee address>

p_req->rejoin = false

I'll try to get Wireshark log for you today/tomorrow

Regards,

[sjf]

Hi Marte,

Is there any update on this?

Regards,

[Marte Myrvold]

Hi,

Sorry for the late reply. I haven't managed to figure what the problem might be yet. Have you been able to do a sniffer log that you can share with me? It'll help a lot with figuring out what's wrong.

Best regards,

Marte

[sjf]

Hi Marte,

Find attached Wireshark log. There's not to much info anyway.

Regards,

log_20201028_leave_req_stuck.pcapng

[sjf]

Also, when leave is initiated from the device that has to leave the network there is no issue. It just works fine

[Marte Myrvold]

Hi,

How are you debugging the example? How did you figure out it gets stuck at zb_address_reset()?

Could you please show me your callstack?

Best regards,

Marte

[sjf]

Hi Marte,

Find IDE screenshot attached.

Regards

[Marte Myrvold]

Hi Santiago,

Where is zb_address_reset() called, and what is it used for in your project?

Best regards,

Marte

[sjf]

Hi Marte, 

It is invoked internally by the Zigbee Task. We do not call it at all.

Consider that there are some bindings set on this device as extra information.

Please, we need to get a response as soon as possible from you/Zigbee team. 

Regards,

[Marte Myrvold]

Hi Santiago,

I have forwarded your problem and will get back to you as soon as I get a response.

In the meantime, what does it look like in your signal handler when the leave signal is received?

Best regards,

Marte