Problem to get AT response and with modem_info_json_string_encode

[ActiTAG]

Hello,

Sorry in advance if it sounds simple, i'm a beginner but I read AT command interface — nRF Connect SDK 1.5.99 documentation (nordicsemi.com) except that I can't retrieve and see the responses to my AT commands. I'm not sure I understand how to do it.

Here source code :

Line 142, my buffer is always empty

Concerning the notification I have this error :

and line 157 modem_info_json_string_encode(&modem_param,root_buf)  crash.

If you have any idea, I will be happy to heard it, please. Thank you.

EDIT : 

This error : [00:03:48.992,340] <err> modem_info_params: Link data not obtained: 20 -5
[00:03:48.992,370] <err> modem_info_params: Network data not obtained: -5

is link to this error in the lib (modem_info_params)

if (IS_ENABLED(CONFIG_MODEM_INFO_ADD_DATE_TIME)) {
ret += modem_data_get(&modem->network.date_time);
} 

But  I don't know what to do to correct it

[Hakon]

Hello,

the link you provided is broken, so I can't look at your code. Can you try uploading the project folder in a zip file? Also, do you get an error if you send AT commands in the link monitor?

[ActiTAG]

Hello, 
Here the zip:
LTE_CONNECT.rar

I don't have any error if I upload the at_client sample and use LTE link monitor. I would like to be able to send ATs cmd and receive the answer in the code to deal with special cases for example.

[Hakon]

at_cmd_write("AT", recv_buf, RECV_BUF_SIZE, NULL);

is not a complete AT command. What are you trying to do here?

[ActiTAG]

Hello,

It's just to get an answer from the modem, it doesn't matter for the moment which AT cmd is used. 

[Hakon]

ActiTAG said:

It's just to get an answer from the modem

 Even if the answer is an error? Why don't you try sending a proper AT command like AT+CEREG or AT+CESQ or something?