secure DFU from sdk 12.1 to 15.2 (SD 3.1.0 to 6.1.0) fail with INVALID_OBJECT.

RE: secure DFU from sdk 12.1 to 15.2 (SD 3.1.0 to 6.1.0) fail with INVALID_OBJECT.

Hung Bui — Fri, 27 Sep 2019 13:10:59 GMT

I'm not sure what could be wrong, could you add a breakpoint inside sd_req_check() and check why it fails ?
As far as I can see in the code, we simply go though all of the sd_req and check if it match the current version.

RE: secure DFU from sdk 12.1 to 15.2 (SD 3.1.0 to 6.1.0) fail with INVALID_OBJECT.

Eddie — Fri, 27 Sep 2019 07:44:49 GMT

The hardware version is correct, that is something we adjusted for our own needs.

I think I found the problem though. When I limit the --sd-req parameter to 0x8C,0x91,0xAF, then the upgrade from 12 to 15 seems to work! Is there an issue in nrfutil ? Is there limited storage for these parameters in the created zip? Can you confirm that this might be an issue?

RE: secure DFU from sdk 12.1 to 15.2 (SD 3.1.0 to 6.1.0) fail with INVALID_OBJECT.

Hung Bui — Thu, 26 Sep 2019 13:04:36 GMT

Hi Wouter,

I haven't tried to test the issue yet, but could you clarify --hw-version 2 is correct ? It should match with NRF_DFU_HW_VERSION define in the code (which by default is 52)

If it actually correct, I would suggest to test with debug version of the bootloader and add the breakpoint (or print log) at where we return NRF_DFU_RES_CODE_INVALID_OBJECT in the bootloader code to see what exactly causing the issue. We have about 5-6 places that we return that error.