How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Llama12580 — Thu, 26 Oct 2023 01:16:01 GMT

Thank you!! Here is my project.

I build the project by using command

west build -b nrf52840dk_nrf52840

I used a virtual machine ubuntu and RCP dongle to act as OTBR.

devzone.nordicsemi.com/.../6305.mqtt_2D00_sn.zip

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Jørgen Holmefjord — Wed, 25 Oct 2023 15:27:28 GMT

It is possible that you get this error because the permissions required to run Thread is not sufficient un USERSPACE. I do not think that path is the correct way to resolve the issue you are facing.

I also do not think there is any crash in your first test, but it could be blocking somewhere. There is no logs indicating crash.

Can you upload your full project for us to debug/reproduce?

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Llama12580 — Wed, 25 Oct 2023 08:45:41 GMT

I enabled the CONFIG_USERSPACE, and now when I make my device join Thread Network, it occurs "MPU FAULT". Could you please help me about that?

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Llama12580 — Wed, 25 Oct 2023 06:59:12 GMT

Hello, are you still there? I need your help. Thank you so much !!!

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Llama12580 — Tue, 24 Oct 2023 06:55:28 GMT

Yes, it crashed when the "exit" words in the final line show out and I can't type in any shell command anymore.

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Jørgen Holmefjord — Tue, 24 Oct 2023 06:47:24 GMT

It does not look like there is any crash in your screenshot. Are you sure that the application crashes?

The exit message comes from the call to exit() in the sample source code, when CONFIG_USERSPACE is not configured.

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Llama12580 — Tue, 24 Oct 2023 06:33:56 GMT

Thank you for answering me.

Like the picture shows, when I run the shell cmd "ot thread start" to make it join Thread, it would show echo "exit" words after a few seconds and then the program crashed.

RE: How to configure Thread in the mqtt-sn-publisher project of zephyr sdk?

Jørgen Holmefjord — Tue, 24 Oct 2023 06:24:33 GMT

Hi,

We do not have any samples for MQTT-SN in nRF Connect SDK, but you might reference this other ticket that tries to do the same thing.

If this does not help, please provide more details about what you mean by "it always exited after it joined Thread network". Can you enable more logging in the sample? Can you provide a sniffer trace of the on-air packets when the problem occurs?

Best regards,
Jørgen