DFU using nRF Connect iOS App not working

RE: DFU using nRF Connect iOS App not working

Amanda Hsieh — Thu, 12 Jan 2023 14:58:11 GMT

Thanks for the update. Happy to know it's resolved. 🙂

-Amanda H.

RE: DFU using nRF Connect iOS App not working

Mike Austin (LPI) — Thu, 12 Jan 2023 00:17:24 GMT

Hi Amanda,

Apologies for the delay - I was enjoying the Xmas and New Year holidays :-)

I've got this resolved now. Not exactly sure what the issue was, but it seemed to be linked to my firmware impementing littlefs storage. As part of this, I needed to free up some flash space, so "merged" the settings and user storage areas of flash to make more space for the littlefs.

Somewhere in all of that, the OTA functionality became broken. Turns out I'm going in a different direction with log files, so don't need the littlefs stuff, and removing all of that appears to have recovered the OTA functionality.

Regards,

Mike

RE: DFU using nRF Connect iOS App not working

Amanda Hsieh — Thu, 22 Dec 2022 14:53:48 GMT

Hi,

[quote user=""]This used to work, but now I'm having issues.[/quote]

What is the difference before changing?

[quote user=""]this is the log file from the App[/quote]

Regarding the log, what are you updating? Updating the image from v2.0.0 to v2.2.0?

Are you able to update images within the same version v2.0.0 / v2.2.0? Just modify the printout or something?

[quote user=""]my attempts so far at reverting back to previous versions haven't gone well[/quote]

Do you mean downgrade to the previous version? If so, It is controlled by the MCUBOOT_DOWNGRADE_PREVENTION configuration. See Downgrade prevention.

Please note that if you disable downgrade prevention, and there is a bug that can be exploited in one version of your application, it will always be possible to use that exploit by first downgrading the firmware to a version where that bug was present. For this reason, downgrade prevention should be enabled for all production devices. If for some reason you need to roll back, releasing older firmware with a new (higher) version number would always be an option. Through downgrade prevention, you control what upgrades are possible (and what updates are not possible), and once upgraded to a later version the device is safe from previous attacks and exploits.

Regards,
Amanda H