How does DFU mode transmit data over Bluetooth

[wasdwasd0105]

Hello,

We want to develop a program that can send and update the firmware using Linux. And I found there is only a DFU demo app for android and ios. I want to know how the updater extract and send the firmware to the NRF devices. 

Thank you

[Vidar Berg]

Hello,

The nRF5 SDK and the nRF connect SDK have different DFU transfer protocols. Do you know what SDK your target device is based on? For the nRF5 SDK you can nRF Util. It runs on Linux. A drawback maybe is that it doesn't work with native Bluez/built-in BT HW so you will need to have an externally connected nRF52 board for BLE connectivity.

Best regards,

Vidar