Zephyr Shell and Host Library AT library

[Waqar Ahmed]

Hi,
I want to add CLI in our current firmware. i found a way to do is Zephyr shell. our firmware is based on aws iot sample and nrfconnet sdk1.9.0  after integrating zephyr shell in our firmware.
I am unable to send/write any command from shell/serial terminal  console because AT host Library is enabled in our firmware.
if I disabled  AT host Library then shell is working but i have not more access to modem.is there any way to use both of them at a time. I am using UART0.

Regards,

[Håkon Alseth]

Hi,

 

I'm afraid AT host library has a dependency on a dedicated uart to work.

In order to "integrate" at_host inside zephyr shell, you need to wrap around the AT cmd handling, ie. add code in your project to do so.

modem shell has dedicated code integrated for this purpose: https://github.com/nrfconnect/sdk-nrf/tree/v2.0.0/samples/nrf9160/modem_shell/src/at

 

Kind regards,

Håkon

[Waqar Ahmed]

Hi Hakon,
I am using nrfConnect SDK 1.9.0 this complete example is not available in this sdk https://github.com/nrfconnect/sdk-nrf/tree/v1.9-branch/samples/nrf9160/modem_shell/src/at

is it possible that I can enable or disable library during runtime i.e AT Host library.
because I want to use the CLI for changing  different variable values or calling function or looking for current status.
right now i am not using CLI for communication with modem.
what I want to do is I will set different variables at time of production, after that I will enable the AT HOST LIbrary.

Regards,

[Håkon Alseth]

Hi,

 

the at host library does not have a init/uninit routine, so you cannot disable and enable this module at runtime.

You'll need to integrate a similar "at" command as done in the modem_shell sample, by adding similar logic as in at_shell.c/.h and registering this as a shell command:

https://github.com/nrfconnect/sdk-nrf/blob/v1.9-branch/samples/nrf9160/modem_shell/src/shell.c#L184

 

Kind regards,

Håkon

[Waqar Ahmed]

Hi Hakon,

Thanks for your response.

Things are working for me now.

AT commands are now working.


is it possible to turn off shell during runtime?

Regards,

[Håkon Alseth]

Hi,

 

Yes, the shell has an uninit function:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.0.99-ncs1/include/zephyr/shell/shell.h#L849

 

Please note that you possibly want to place the transport (UART in this case) into a powered off state afterwards as well.

Here's an example on how to place the uart in a suspended state:

https://github.com/nrfconnect/sdk-nrf/blob/v2.0.0/applications/serial_lte_modem/src/slm_at_host.c#L232

 

Kind regards,

Håkon