Standalone DFU Downloader

RE: Standalone DFU Downloader

Turbo J — Tue, 24 Feb 2026 09:35:08 GMT

What are you willing to pay for your tool? Because nothing exists that fit your requirements exactly as far as I know (and I am surely missing something).

You seem to be on older SDK versions (NCS does not use softdevice as a separate flash entity) and nrfutil never supported native windows BTLE devices. It only ever worked with a DK running special (connectivity) firmware. You could run updates via USB (or UART) without additional hardware though.

I remember that I had to manually add DFU to one of my windows applications for OTA support, but that was on NRF51 with SDK12.x versions.

RE: Standalone DFU Downloader

Sigurd Hellesvik — Tue, 24 Feb 2026 08:49:27 GMT

Hi Steve,

Before we go further, can you confirm which version of the SDK you use for your nRF52840 application?

You see, the answer will differ depending on this, so I want to make sure we continue this down the correct path.

Regards,
Sigurd Hellesvik

RE: Standalone DFU Downloader

nordicator_prim3 — Mon, 23 Feb 2026 20:32:13 GMT

Hi, I'm not aware of any standalone apps that would do this besides Nordic's iOS and Android app implementations which are not very end-user friendly. Here is a list Zephyr has compiled of software packages that implement the necessary underlying mcumgr functionality. This table groups them by OS compatibility and mcumgr feature sets. You would still have to probably build out a gui that uses one of these packages on the back end, but it should be an option.

I've had a reasonably good experience with the python package "smpclient" using Windows that is mentioned in the table.