DFU using USB mass storage on nrf52840

RE: DFU using USB mass storage on nrf52840

Menon — Tue, 13 May 2025 06:31:11 GMT

Hello,

[quote user="JasonR"]I will work on a solution based on the code from the devzone post and I will try to remember to update this page with the nrf52840 solution (in case it's useful to anyone)[/quote]

That would be really helpful for future incoming users, and I wish you great success with your development. In case you struggle at some point, don't hesitate to ask in DevZone.

Kind Regards,

Abhijith

RE: DFU using USB mass storage on nrf52840

Jason — Mon, 12 May 2025 17:23:12 GMT

thank you!

Sometimes it's not easy to find the right example, so it's best to ask.

I will work on a solution based on the code from the devzone post and I will try to remember to update this page with the nrf52840 solution (in case it's useful to anyone)

Kind regards

-Jason

RE: DFU using USB mass storage on nrf52840

Menon — Fri, 09 May 2025 12:57:33 GMT

Hello,

[quote user=""]Is there an example for nrf52840? I can't find it.[/quote]

There is no official sample showcasing USB Mass Storage DFU. However, there are some examples using USB CDC ACM, which provides a serial port over USB, similar to a USB-to-serial adapter, but not like a USB flash drive. See the USB Device Support section for more details.

[quote user=""]I believe there is an nrf52840 UF2 bootloader from adafruit, I've not tried to use it yet. I would prefer to use the nordic recommended approach.[/quote]

This is true and an approachable method. UF2 is a USB Mass Storage-based bootloader, where you can simply drop .uf2 files onto a drive that appears as a USB mass storage device. I have not personally tried this, and it is not officially supported, as it is not based on MCUboot. You can find more information about this here.

Kind Regards,

Abhijith