Integrating nrf_ble_dfu GATT service directly into application

[Anthony Ambuehl]

I am building a system with an external non-volatile storage (flash) which will be available for storing DFU image data received.  I want to minimize the confusion and temporary loss of functionality that occurs during DFU when the processor is in the DFU bootloader, by storing the image in the external storage and only copying the validated image at a convenient time when device functionality is not required.

Will it be possible to use Nordic's example source code to transfer the DFU images directly with the application without transitioning to the DFU bootloader?

Are they any foreseeable problems that we might discover with this approach?

Any example project that models this approach in the usual format?  The bootloader has a significantly different format from the typical example project.

thanks

a*

[Einar Thorsrud]

Hi,

It is possible to implement the BLE DFU transport in the application using the relevant libraries in the SDK. However, there are no examples that actually do this. You can refer to for instance this post which shows how to implement DFU transport in the application for UART though since much of the principle is the same.