Setting up DFU OTA

RE: Setting up DFU OTA

Sigurd — Wed, 23 Mar 2022 11:42:27 GMT

Hi,

Is this a custom board or the DK?

In the bootloader project's sdk_config.h file, there is a config that sets what pin that is used to enter bootloader mode.

RE: Setting up DFU OTA

lidorelias3 — Fri, 18 Mar 2022 17:17:46 GMT

It doesn't work. I uploaded the blinky example using DFU, is the application I need to upload with DFU needs something special to support DFU? or the bootloader handles that?

RE: Setting up DFU OTA

Sigurd — Wed, 09 Mar 2022 10:13:14 GMT

Try holding button 4 down, then press the reset button on the DK.

RE: Setting up DFU OTA

lidorelias3 — Sun, 06 Mar 2022 20:32:55 GMT

Hey,

After I flashed the DFU secure bootloader I managed to connect to it with NRFConnect in my iPhone. Then, after I upload the new application via DFU, I can't go back to the DFU mode even when I press button 4 (It just restart and go back to the application I uploaded). How should I go back to DFU mode?

RE: Setting up DFU OTA

Sigurd — Wed, 02 Mar 2022 10:27:32 GMT

It's possible, See e.g. these comments:

https://devzone.nordicsemi.com/f/nordic-q-a/61707/unable-to-enter-bootloader-after-flashing-new-firmware-with-segger-embedded-studio/251712#251712

https://devzone.nordicsemi.com/f/nordic-q-a/34212/howto-flash-bootloader-settings-for-dfu-using-ses-at-debug-time/209267#209267

RE: Setting up DFU OTA

lidorelias3 — Tue, 01 Mar 2022 20:48:52 GMT

Is there a way to use Segger to flash the bootloader with my application?

RE: Setting up DFU OTA

Sigurd — Mon, 28 Feb 2022 08:59:00 GMT

[quote user="lidorelias3"]How should I incorporate the bootloader into my project?[/quote]

Just flash the bootloader hex file, along with your application hex file(and SoftDevice + bootloader settings page). You can also merge them if you want using mergehex tool

RE: Setting up DFU OTA

lidorelias3 — Sat, 26 Feb 2022 17:00:20 GMT

Thank you for your response!
How should I incorporate the bootloader into my project?

RE: Setting up DFU OTA

Sigurd — Wed, 23 Feb 2022 12:32:53 GMT

Hi,

[quote user=""]In my case, I copied the code from the NRF SDK 15.3 DFU secure_bootloader example for pca10040_ble and included all of the required files.[/quote]

That's not how you do it, you don't combine them. You keep it as 2 separate projects. The bootloader will be located at then end/top of the flash.

I recommend that you take a look at this guide: https://devzone.nordicsemi.com/guides/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader