NRF52840 DFU Firmware Update using our own Mobile BLE Application

[hossein_m]

Hello all,

I want to enable OTA DFU capability to NRF52840 BLE Chip. I am now using Buttonless DFU which works fine using nrfutil. But my question is : how can we update firmware code directly through our mobile or desktop application. I have spent much time reviewing Nordic DFU documentation but there is nothing helpful on how to send program code & its signature on DFU services/characteristics.

[kirkus]

Nordic has a DFU library available for iOS, Android, and JavaScript

[hossein_m]

We need to have it also on a desktop application over BLE. It seems Javascript code just supports USB CBC. Is there a clear workflow on taking client side for this process so we can implement it inside our application.

[kirkus]

The code for pc-nrfconnect-ble implements the DFU functionality for the desktop nRF Connect app, hopefully that will get you going in the right direction.