nrf9160dk How to add custom at command

[llly]

I want to add a custom at command in the SLM example . I follow the https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.1/nrf/libraries/modem/at_cmd_custom.html, enable  CONFIG_AT_CMD_CUSTOM in prj.conf, add at_cmd_custom.h to the main.c, and the following code was added

AT_CMD_CUSTOM(my_command_filter, "AT+MYCOMMAND", my_command_callback);

int my_command_callback(char *buf, size_t len, char *at_cmd);
{
    printf("Callback for %s", at_cmd);
    return at_cmd_custom_respond(buf, len, "OK\r\n");
}


I found slm_at_cmdulist in slm_at_commends.c, And try to change my_command_filter to slm_at_cmdulist,It also has no effect

Apart from the at command supported by the SLM example itself, the MYCOMMEND command I added did not take effect. Did I make a mistake in which step? Or which step was missed?

gratitude

[llly]

Now it has been implemented to add custom commands in the SLM example, but I used the same method to add custom commands to a hello world project. Custom commands only return OK when sent the first time, and error when sent the second time or after, The built-in commands in the modem, such as+cfun or+cereg, do not have this issue

[Charlie]

Hi Illy,

I did a quick check by modifying SLM application in NCS v2.6.1. It works as expected.

Here are the project and hex file. You can check the difference compared with your modification.

ncs261_slm_customATcommands.zip

ncs261_slm_customATcommands.hex

I suggest you refer to this page if you want Extending the application — nRF Connect SDK 2.6.99 documentation (nordicsemi.com) in SLM application.

Best regards,

Charlie

[llly]

hi Charlie,

thank you for your help. I have successfully added custom commands to SLM and they are working properly. I compared my SLM with the SLM you sent me, and the custom command section is consistent. The current issue is that custom commands added using the same method in other sample level projects will only return normally when the first command is entered, and will return an error when entered again later, as shown in the above figure

[Charlie]

llly said:

The current issue is that custom commands added using the same method in other sample level projects

"other sample level projects" Which sample have you tested with? I can have a try.

[llly]

nrf\samples\cellular\at_client 

Thank you.