Secure BLE DFU Upgrade failure.

[Ganesh S K]

Aim: To upgrade the existing Bootloader + Softdeivce + Application package build using nrf_sdk_15 to nrf_sdk_17 on the NRF52840_DK.

Problem: I successfully flashed the secure bootloader with softdevice and application as specified in the documentation specified in https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Findex.html with sdk_15, and also I can do the same using sdk_17, both separately. Meaning, I can flash the SD+BL+APP using the nrf_toolkits DFU application remotely using both the SDK's (15 and 17) individually. 

But when the device already has SD+BL+APP build using SDK_15, and then I try to upgrade it with the new package build using SDK_17, I get an SD_VERSION failure error.

I have followed the standard procedure that is available on the above-mentioned link. I have chosen the right sd-req for the individual SDK's (0x00B6 -> SDK_15 and 0x0100 -> SDK_17), and my keys are also correct.

Any help regarding this is much appreciated, and thank you in advance.

Sincerely,

Ganesh S Koparde.

[Simonr]

Hi Ganesh

Can you please upload a log of your nrfutil command and the log following that causes this SD VERSION failure error. The SD VERSION failure should only occur due to an invalid --sd-req version.

Best regards,

Simon

[Ganesh S K]

Simonr, thank you for your reply. The SD Versions are correct as I have taken them from the release notes of the respective SDK's. Also, when I flash the package individually, the application works perfectly fine.

Now my requirement is as below:

-> The board is already having SD+BL+APP built using SDK_15. 

-> I have generated a new package ( a ZIP of SD+BL+APP using SDK_17 )  using the instructions provided in https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_bootloader_dfu_validation.html#lib_dfu_image, and when I try to upload the package, I get the SD VERSION failure.

I am completely a beginner to this embedded world. Could you please let me know how to enable the logs?

I tried to enable it via the SDK_CONFIG file, and I get memory overflow errors.

Regards,

Ganesh S Koparde.

[Simonr]

Hi

Sorry, what I meant by log was a screenshot or upload of the nrfutil command you're using to upload the new package to your device. Do you use --sd-id? The first update requires --sd-req to be set to the ID of the old SD- The app update then requires the ID of the new SD, and the new ID must be set using the --sd-id parameter. Please see the DFU package combinations page here. 

Best regards,

Simon

[Ganesh S K]

Simonr, 
Thank you very much for your answer. The mistake I was doing is in two parts:

1) I generated the update package (SD+BL+APP with SDK_17) bundled under a single ZIP file.  Rather, we should do it separately, i.e., first, we have to generate SD+BL as per the link you mentioned in your previous answer. We should then generate the application separately with the new SD version specified in the --sd-id argument.

2) In the update package, we should not merge the bootloader with bl_settings because it requires additional memory, which will result in a DFU_INSUFFICIENT_RESOURCE error.

Sincere regards,

Ganesh S Koparde.