nrf5340 NCS DFU issus

[giun.kim]

I have a question regarding DFU while transitioning from development using the nRF52832 with the nRF5 SDK to the nRF5340 with NCS. Currently, I have a DFU app developed for the nRF52832 with the nRF5 SDK, but it seems unable to update firmware developed with the nRF5340 and NCS. Could you explain the reason for this? Do I need to redevelop the DFU app? I would like detailed information on this matter.

[Einar Thorsrud]

Hi,

The nRF5 SDK use a secure DFU protocol that was developed together with the nRF5 SDK. This is fundamentally different from the Mcu Manager protocol that is used in the nRF Connect SDK. It is possible to make an app that support both (like our nRF Connect for Mobile) though, and we provide libraries for both. I assume you are familiar with the libraries for the nRF5 SDK (IOS-DFU-Library and Android-DFU-Library) and that this is what you are currently using in your application. If you want to support the nRF Connect SDK DFU, you need to incldue the libraries included in and demonstrated by IOS-nRF-Connect-Device-Manager and Android-nRF-Connect-Device-Manager.