write to nRF52840 dk with hex file by command line

[netanel4630]

I want to write to nRF52840  the example "ble_app_hrs_pca10056" from nRF5_SDK_15.2.0 by command line.

first I merge 3 hex file (bootloader, softdevice and app) with the command :

mergehex -m qspi_bootloader_pca10056.hex  s140_nrf52_6.1.1_softdevice.hex  ble_app_hrs_pca10056_s140.hex  -o output_file.hex

after i write to 52840 with the command:

nrfjprog -f NRF52 --program output_file.hex --chiperase

 and then restart it with command:

nrfjprog -f nrf52 --reset

when i check it i cant see signal from the device.
maybe I do something wrong and i appreciate if someone can tell me what to do (or/and even write link to files) 

I only want to burn the hex file (no matter the example)

[tesc]

Hi,

You need to also generate a bootloader settings page and flash it to the device together with BL+SD+App. Not doing so results in the bootloader not starting the application on startup. In addition to that, note that you should erase flash before programming, or at least erase the page containing the MBR parameter storage. (MBR parameter storage is used for backup for the bootloader settings page, for SDK 15.2 bootloader and later.)

I suggest that you have a look at Getting started with Nordic's Secure DFU bootloader, a step by step guide, (although it may still be missing the detail about making sure the MBR parameter storage page is empty.)

Regards,
Terje

[netanel4630]

Thanks for your help. Im try to do what you wrote. I succeeded to output settings page with the command "

nrfutil settings generate --family NRF52840 --application app.hex --application-version 3 --bootloader-version 2 --bl-settings-version 1 settings.hex"

when i change the name file of the application. After that I try to merge all the file together and get "conflict"
Im use SDK 15.2.0 and I dont know which  version I need to write for every argument + I dont know if the files I merge are good to be merge together.

Can you guide me to a specific files from this sdk and what version they are? 
Now I only need to some example be written to the nordic by the command line