Not able to use nordic proprietary AT-Commands on nrf9160

RE: Not able to use nordic proprietary AT-Commands on nrf9160

jannis — Thu, 24 Mar 2022 14:33:46 GMT

Hey Charlie,

That was actually a very good hint, i was using the wrong apn the entire time,

for anyone facing a similar problem, this is my code to set the apn, while using the LTE link controller to handle the connection:

void set_apn(){
  char response[256];
  nrf_modem_at_cmd(response, 256, "AT+CGDCONT=0,\"IPV4V6\",\"your.chosen.apn\"");
  printk("set apn: %s\n", response);
}

Thank you Charlie for your help!

RE: Not able to use nordic proprietary AT-Commands on nrf9160

jannis — Wed, 23 Mar 2022 13:20:54 GMT

Thank you! I will look into that

RE: Not able to use nordic proprietary AT-Commands on nrf9160

Charlie — Wed, 23 Mar 2022 12:08:32 GMT

Hi Jannis,

PDN can be set automatically by default or manually, you can search PDN to refer to more discussion about it.

I guess the next step you need to improve your code compatibility with the NB-IoT network.

You can still play nRF9160: Serial LTE modem — nRF Connect SDK 1.9.1 documentation (nordicsemi.com) TCP commands with NB-IoT network and learn its source codes to see how to improve your codes.

Best regards,

Charlie

RE: Not able to use nordic proprietary AT-Commands on nrf9160

jannis — Wed, 23 Mar 2022 10:26:18 GMT

Hey Charlie, thank you for your reply!,

that's a good idea, i only tested on the thingy with lte-m, which worked, i just tested it on the thingy91 with nb-iot and the connection process times out here as well.

I did some research but whenever I look up Information about nb-iot most of it is for businesses highlighting its advantages for their products, but not so many technically details or processes, we use a deutsche Telekom sim-card specific for nb-iot. Is it common that there is some registration necessary to connect to the internet/pdn?(softwarewise during the connection-process, like with this method: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.3.1/nrf/include/modem/lte_lc.html#_CPPv419lte_lc_pdn_auth_set20lte_lc_pdn_auth_typePKcPKc )

Best regards,

Jannis

RE: Not able to use nordic proprietary AT-Commands on nrf9160

Charlie — Wed, 23 Mar 2022 09:59:33 GMT

Hi Jannis,

I have two suggestions:

1) Can you verify your codes with thingy works with the NB-IoT network?

2) Can you test your custom board with nRF9160: Serial LTE modem — nRF Connect SDK 1.9.1 documentation (nordicsemi.com) TCP commands? You need to verify if the HW especially the antenna has issues or not.

Best regards,

Charlie

RE: Not able to use nordic proprietary AT-Commands on nrf9160

jannis — Wed, 23 Mar 2022 08:50:20 GMT

Hey :),

All right, I just realized that using those proprietary at-commands is only possible when externally controlling the serial lte-modem.

But that still leaves me with the timed out connection and I am back to the beginning of the search for the cause.

I would be very happy if anyone has an idea.

greetings Jannis