Can nRF5_SDK11( nRF5_SDK_11.0.0_89a8197 ) support upgrade bootloader?

[Chris_]

Hi, dear Nordic & all：

I have a question about upgrade bootloader.hex, that is : Can I upgrade bootloader part when develop on nrf52832 with nRF5_sdk11( nRF5_SDK_11.0.0_89a8197 )?

Beacuse I generate a zip file by the fellow cmd (nrfutil version is 6.1.0, becasue version 0.3.0.0 is not support "nrfutil pkg" command): 

   nrfutil pkg generate --hw-version 52 --sd-req 0x88 --bootloader-version 0x01 --bootloader ble_bootloader_c03_new.hex bootloader_dfu.zip

Then I use nRF Conenct to upgrade it , but it failed, the screenshort is fellow:

                                

Or the way  that I generate zip file is wrong?

Thanks for kind reply. 

[Einar Thorsrud]

Hi,

The bootloader in SDK 11 is the now so called "legacy bootloader", which is not supported by later nrfutil versions.  You need to use version 0.5.3 in order to generate valid zip files for your bootloader.

[Chris_]

Hi, Einar：

 Thanks  for your reply frist.

 So, Is that mean SDK 11 support bootloader itself upgrade？

[Einar Thorsrud]

Yes, the bootloader supports upgrading itself. The only component that cannot be upgraded via DFU is the MBR, which resides in the very first page. (The MBR is responsible for executing bootloader and SoftDevice upgrades by doing the actual copying.)

[Chris_]

I cannot find nrfutil 0.5.3 in Github, 0.5.1 is the most close , can you help me offer me the correct version link?

[Einar Thorsrud]

I should have written 0.5.x. The trivial version is not important. You should be able to install at least 0.5.2 from pip using:

pip install nrfutil==0.5.2