RE: How to do DFU OTA update over BLE using nRF Connect SDK

Einar Thorsrud — Thu, 16 Sep 2021 11:13:29 GMT

Hi,

The nRF Connect SDK is completely different from the nRF5 SDK in most aspects, including DFU. But DFU is still supported in a different way. It uses MCUBoot as the bootloader, and the Simple Management Protocol (SMP) to transfer the image.

The build system integrates this all, so if you select that you want to build with MCUboot and BLE transport, you will get everything built for you, both bootloader and application, and you will get signed application update images. This is demonstrated by the SMP Server Sample. Note that you can ignore the section about imgtool in the sample documentation, as the nRF Connect SDK does this automatically under the hood using the partition manager.