nRF52840 BLE OTA implementation on central and peripheral sides

[habibfarahani]

 Hi! Currently I am working on a project based on nRf52840 used in wearable, battery backed sensors and one acting as a central device.  Since most data exchange functionality is implemented I have started working on DFU.  The central device firmware is updated via serial port.  I have been able to use nrfutil python modules to do that.  However, when I run nrfutil dfu ble, it tries to load a specialized firmware on the central device (in this case nRf52840 DK).

My question is that, is there a reference or example available that I could port to my central device so that I could implement BLE DFU (OTA) on the central device?  Is the illusive specialized firmware available in source format in github or somehere? I do not want to reinvent the wheel and if there is already such reference code available, I'd rather use that.  Currently all my peripheral devices can be upgraded using nrf Toolbox DFU app.  I'd like to do the same from my central device.

I appreciate any help that comes this way.

Cheers

HF

[tesc]

Hi,

With nrfutil, for BLE DFU, it uses an nRF device for BLE connectivity, and the DFU controller itself is run on the PC. Therefore it starts by downloading connectivity firmware to the connected device.

I am afraid we do not have DFU controller firmware examples, only DFU target examples, for nRF devices. We do however have implementations for pc, that you can use for reference (nrfutil source code on github, pc-ble-driver-js which is used for nRF Connect for Desktop.) The protocol and BLE transport for DFU is also pretty well documented on Infocenter.

Regards,
Terje

[habibfarahani]

Thank you Terje! That is what I thought but having your confirmation will allow me to scope the efforts better.

Cheers

HF