nRF9160 Modem Firmware Update

[Siddharth Kachhia]

Hi, I'm working on updating nRF9160 modem firmware update.

I have update modem[mfw_nrf9160_1.3.1.zip] using nRF connect Desktop application and read partition using nRF connect-Programmer utility.

After updating modem firmware successfully, I could not find modem firmware in any of the flash partition. On read, it shows blank partition.
So, Where is the modem firmware stored in nRF9160 dk board ?

Question:
1) nRF9160 Modem Firmware is stored into which partition ?
2) How can I read that flash area of modem firmware ?
3) If I want to update modem firmware using application, can I perform DFU of modem in nRF9160 board ?

[Didrik Rokhaug]

Hi,

1) nRF9160 Modem Firmware is stored into which partition ?

The modem is running on its own core, with its own flash area.

2) How can I read that flash area of modem firmware ?

The modem FW is readback protected, so you can not read it out after it is written.

3) If I want to update modem firmware using application, can I perform DFU of modem in nRF9160 board ?

Yes, modem DFU is possible. 

As a starting point, you can look at these three samples:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/fmfu_smp_svr/README.html

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/http_update/full_modem_update/README.html 

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/http_update/modem_delta_update/README.html

Best regards,

Didrik

[Siddharth Kachhia]

Thanks