Changes in upgrading units during production

[Tron]

In earlier releases of the mfw for the nRF9160, we got 3 files with the image, one of them being firmware.update.image.hex. This is missing in the new updates. How do we update the 9160 during production? 

In development, I've used the nRF Connect Programmer, but this is not a viable solution for production. I need a CLI command in order to upgrade the unit in one step. How do we do this?

Tron

[Peder Rand]

Hi Trond,

The CLI version of the programmer tool nrfjprog is here:

https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Command-Line-Tools

It's important to use the latest version of the tool with 1.1 modem firmware. 

Chapter 5 in this document describes the production test modes:

https://www.nordicsemi.com/-/media/Software-and-other-downloads/SiP/nRF9160-SiP/nRF9160-Hardware-integration-guide.pdf

Consider locking the debug interface and turn on downgrade prevention in the modem after programming for additional security.

[Jackson Wilson]

Peder:

Can you give examples of exactly how to call nrfjprog to upgrade the modem firmware for the nRF9160?  

The ZIP contains multiple HEX files, as well as BINs for FOTA, and I'm not sure which need to be programmed to the device.

Thanks,

Jackson

[Tron]

AFAI read, the process is as follows: 

1. Merge the 2 hex files in the mfw_nrf9160_1.1.0.zip file using the mergehex tool, producing the file mfw_1.1.0_merged.hex
2. Prorgam the device using nrfjprog -f NRF91 --program mfw_1.1.0_merged.hex
3. Program the device with our software; nrfjprog -f NRF91 --program merged.hex

Please confirm. 

[Didrik Rokhaug]

Hi Tron.

To program the modem from the command line, I recommend following the procedure given by Sigurd in this ticket:

https://devzone.nordicsemi.com/f/nordic-q-a/53208/updating-nrf9160-modem-firmware-through-the-command-line

Best regards,

Didrik

[Tron]

THank you, easy and clear