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

[Llama12580]

I want to configure Thread in project mqtt-sn-publisher( https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/net/mqtt_sn_publisher ) and communicate with mqtt-sn-gateway through Thread network.

I followed the instruction(https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/protocols/thread/configuring.html) to add some configurations in file prj.conf of mqtt-sn-publisher project.

# Have added these in prj.conf
CONFIG_NET_TCP=n
CONFIG_SHELL=y
CONFIG_NET_L2_OPENTHREAD=y
CONFIG_OPENTHREAD_SOURCES=y
CONFIG_OPENTHREAD_SHELL=y
CONFIG_SHELL_BACKEND_SERIAL_RX_RING_BUFFER_SIZE=2048

But it always exited after it joined Thread network. What is the problem? Did I do something wrong?

[Jørgen Holmefjord]

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

[Llama12580]

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.

[Jørgen Holmefjord]

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.

[Llama12580]

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

[Llama12580]

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

[Llama12580]

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?