Trying to downgrade DFU with NRF52 and SDK 17.0.2

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Amanda Hsieh — Thu, 15 Dec 2022 18:32:00 GMT

Happy to know it works. Thanks.

-Amanda H.

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Cintia — Thu, 15 Dec 2022 17:05:24 GMT

Hi Amanda,

Thanks for your help, I figured out what I was doing wrong: I was changing the application sdk_config, when I should be changing the bootloader sdk_config. Now I can downgrade through versions!

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Amanda Hsieh — Tue, 13 Dec 2022 17:36:50 GMT

Hi,

[quote user="Cintia"]First I searched for that define in my sdk_config.h and it wasn't there, so I added and set it to 0.[/quote]

Do you modify the sdk_config.h in the bootloader?

[quote user="Cintia"]I tried performing the downgrade with the config NRF_DFU_APP_DOWNGRADE_PREVENTION set to 1 and later with 0, both failed. It tries to connect and start the DFU but it just disconnects.[/quote]

Could you test the bootloader example with debug version and provide the log?

-Amanda H.

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Cintia — Tue, 13 Dec 2022 17:17:13 GMT

Hi,

I tried performing the downgrade with the config NRF_DFU_APP_DOWNGRADE_PREVENTION set to 1 and later with 0, both failed. It tries to connect and start the DFU but it just disconnects.

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Amanda Hsieh — Tue, 13 Dec 2022 16:50:59 GMT

Hi,

[quote user="Cintia"] I added and set it to 0.[/quote]

Please set the config NRF_DFU_APP_DOWNGRADE_PREVENTION to 0 to disable it in sdk_config.h.

-Amanda H

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Cintia — Tue, 13 Dec 2022 16:36:33 GMT

Hi Amanda,

I saw this post before opening a new ticket. First I searched for that define in my sdk_config.h and it wasn't there, so I added and set it to 0. Then again I tried to downgrade my FW but it didn't work, still disconnecting.

Do you know anything else I could try?

Best regards.

RE: Trying to downgrade DFU with NRF52 and SDK 17.0.2

Amanda Hsieh — Tue, 13 Dec 2022 16:29:29 GMT

Hi,

This post might help. Please let me know if anything is not clear.

Regards,
Amanda H.