How flash nrf9160 with the at command firmware

[Alban THIERRY]

Hi,

I have design my own board using a µC to talk to the nrf9160 in at command. My code is working with the devboard, but I don't understand how to flash the AT command code inside the NRF9160. I have download from your website the v1.3.6. I have unzip the file try to flash :

72B3D7C.ipc_dfu.signed_1.2.0.ihex

firmware.update.image.segments.0.hex

firmware.update.image.segments.1.hex

with the programmer software.

But nothing it happening. The nrf9160 never send the ready signal on the uart.

Did you know where I can find a manual to know how to flash the NRF9160 ?

I am do it correctly ?

Best regards,

Alban

[JONATHAN LL]

You need to program the device over the SWD interface. 

You need to flash the Modem firmware and the application firmware(AT Host or whatever you want on it).

You can use a couple of different method but an easy way is to use the nRF connect for Desktop Programmer App. 


Programming the application core:
https://infocenter.nordicsemi.com/topic/nan_041/APP/nan_production_programming/program_application_core.html?cp=2_1_6_4 

 Updating the modem firmware:
https://infocenter.nordicsemi.com/topic/nan_041/APP/nan_production_programming/updating_modem.html?cp=2_1_6_3_3 


Regards,
Jonathan

[Alban THIERRY]

Hi Jonathan,

I'm able to flash via SWD with a J-link connection.

What I have done yet is reset the AT client  firmware on my NRF devboard via "quick start" software, then copy the fimware via via the "programmer" software and flash this firmware to my board.

With this method did I flash only the application firmware or both application and modem ?

This a picture of the content of the flash in my board

Best regards,

Alban

[JONATHAN LL]

If you added the modem firmware there as well then it should also have been upgraded. 



Looks like this when complete:



Regards,
Jonathan

[Alban THIERRY]

Thank for your answer, I way able to flash the modem firmware.

Did you know where I can find the AT client firmware ?

Best regards,

Alban

[JONATHAN LL]

AT client docs: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.4.99-dev1/nrf/samples/nrf9160/at_client/README.html#nrf9160-at-client 

Ad the code can be found here: https://github.com/nrfconnect/sdk-nrf/tree/main/samples/cellular/at_client 

You can try to downlaod files for the nRF9160DK, here: https://www.nordicsemi.com/Products/Development-hardware/nRF9160-DK/Download?lang=en#infotabs It conatins the AT client. But it is build for the nRF9160DK so if your custom board uses other pins or whatever it might not work exactly as expected. 


Det file is in the img_app_bl folder and is named nrf9160dk_at_client_2024-03-13_af2b60d2.

Regards,
Jonathan

[Alban THIERRY]

Thank Jonathan, it has solve my problem