nrfutil generate zip can not work

[Chaw]

Hi, Nordic

I download nRF5_SDK_12.1.0_0d23e2a\examples\dfu\bootloader_secure example, when I use dfu example via android nRF Toolbox, it can work.

Then I build nRF5_SDK_12.1.0_0d23e2a\examples\ble_peripheral\experimental_ble_app_buttonless_dfu, first use nrfutil to generage private.pem, then use nrfutil to generate zip, when I start to DFU, it can not work:

device log:

:INFO:PB: Init data len: 61

:INFO:Handling signed command

:INFO:Prevalidate FAILED!

:INFO:Sending Response: [0x4, 0xa]

android nRF Toolbox show "UNKNOW ERROR(8202).

maybe it is related to key, If I use bootloader_secure example, how can I generate my app dfu zip?

If I do not want to use secure, how can I do?

Thanks.

[Hung Bui]

Hi Chaw,

When you use experimental_ble_app_buttonless_dfu, did you flash the bootloader_secure before that ?

Note that the experimental_ble_app_buttonless_dfu() is just the demonstration to switch from the application to the bootloader. It's not the bootloader.

If you can do DFU update with bootloader_secure, this mean your .zip file is fine.

[Chaw]

Now, it work fine. The hw version should be 52. Thanks.