Problem with thingy 91 upload over USB cable

[fabocode]

Hello!

I was going to start to program my Thingy 91 but since I don't have a J Link Programmer cable or a nRF9160 DK. I was planning to use mcuboot like suggest this documentation but when is time to uploading the .bin file I'm not getting the expected results...

I decided to upload the asset_tracker example after building it with: west build -b nrf9160_pca20035ns

but according to the documentation, I need to look for a file inside build folder previously  created : build/zephyr/app_update.bin

However, I can't find that app_update.bin file. Instead, I find a zephyr.bin file

Which is the one that I am uploading the thingy 91 with

mcumgr --conntype=serial --connstring=COM11 image upload zephyr.bin 


and then with 

mcumgr --conntype=serial --connstring=COM11 reset 

And I don't receive any output from the terminal window.

I guess I am selecting the wrong .bin file to upload to the Thingy 91, but I don't know which file should be, can I get any help? 
I may be missing something.

Thanks

[Heidi-Irene Harvey Sollie]

Hi! The file should be called either app_update. bin or update.bin. 

However, you need to enable the BOOTLOADER_MCUBOOT configuration before building to generate the file, which is probably why you can't find it.

Add the following line to the prj.conf file of the example you want to build:

CONFIG_BOOTLOADER_MCUBOOT=y

Best regards,

Heidi

[fabocode]

Hi Heidi-Irene Harvey Sollie

Thanks for your answer, that works, I also found how to do it with the Nordic SEGGER Studio! 

Do you also know if this process can be made to program the modem firmware from the nRF9160? If that is the case, how can I do it? 

I have another thread here I am trying to find the way to solve that issue by reprogramming the modem firmware. 

Thanks!