SDK v15 DFU - Update Bootloader zip file fail.

[Atlas]

Hi

I used nrfutil.exe (v3.5.1 based on python v2.7.13) to create bootloader.zip file from SDK v15 - \dfu\secure_bootloader\pca10040_ble\  sample code.

CMD : nrfutil.exe pkg generate --hw-version 52 --sd-req 0xA8 --bootloader nrf52_bootloader.hex --bootloader-version 0xFF --key-file key.pem nrf52_bootloader.zip

After got nrf52_bootloader.zip and let nRF52-DK jump to DFU mode, I used APP - nRFconnect or nRFtoolbox to update it but it shows fail (Invalid object).

The same command, I just changed bootloader hex file to application file (ex :ble_app_hrs) then create application.zip, it can update application.zip by APP - nRFconnect & nRFToolbox.

Could you help to check this issue? 

Thanks.

BR

Atlas

[Sigurd]

Hi,

Is this the error message you get?

Image from nRF-Connect desktop:

This generally means that the public key in the bootloader and the private key used to sign the DFU image does not match.

Please make sure that you are using the correct private key, and try again.