BLE OTA DFU using external flash

[allenyang]

I'm using the NCS 2.5.2 sdk and nrf 5340 with 7002, and I want to do BLE OTA DFU using external flash.

I've found this guide Add DFU support to your application - Software - nRF Connect SDK guides - Nordic DevZone (nordicsemi.com), and successfully  done BLE OTA DFU using internal flash, just add the commands below,

#Enable MCUBOOT bootloader build in the application

CONFIG_BOOTLOADER_MCUBOOT=y

#Include MCUMGR and the dependencies in the build

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

but I don't know how to do with external flash, I've tried looking at main.c in mcuboot, and I didn't find where to modify the code.

[allenyang]

7571.hello_world_1.zip

Hi, the device tree which I use is in the board folder of the project.

thank you!

[Sigurd Hellesvik]

And what build configuration/command should I use?

[allenyang]

use default config

I've added the line in CMakeLists, so just choose any boards when first time build. And add build configuration again then the custom board will appear

[Sigurd Hellesvik]

I added some configurations to the MCUboot child image. See this course to learn about it.

Now the sample builds for me

0878.hello_world_1_urd.zip

[Sigurd Hellesvik]

6675.hello_world_1_urd.zip

Somehow it looks like the upload failed so Im trying again