DFU bootloader

[chandan]

Hi, I am using nRF52832. I want to update my boot loader using DFU, I am unable to find correct command to get .zip file. I am using below command:

nrfutil.exe pkg generate bootloader.zip --bootloader secure_bootloader_ble_s132_pca10040.hex --application-version 0xffff --sd-req 0xfffe

Thanks

[Hung Bui]

Hi Chandan, 

Which issue you have ? I think you need --bootloader-version in addition  .

[chandan]

I am using below commands and getting Waring :

nrfutil.exe pkg generate bootloader.zip --bootloader secure_bootloader_ble_s132_pca10040.hex --bootloader-version 02 --hw-version 52 --sd-req 0xB7

Should i also add key --key-file ? if yes which one pubic or private?

[Hung Bui]

It's up to you. If you want your image to be signed you would need to provide the private key. 

If you use the secure bootloader, it wouldn't accept an image without signature. 

Please have a look at my guide here.