Device Firmware Update (DFU) tutorial

[Sreejith Sundh]

Hi,

Is there any tutorials or examples avaialble for adding DFU service? I would like to add DFU service for my application. I am using nRF52840 development board with S140 softdevice.

Thanks and looking forward resposne.

Thanks and Regards,

Sreejith

[Amanda Hsieh]

Hi, 

The relevant documentation that describes how to add buttonless DFU to the application is found here, and there is an example in this post. 

Regards,
Amanda

[Sreejith Sundh]

Hi Amanda,

Thank you for your response and sorry for belated response.

As I am developing a peripheral device with custom service, I would like to add the dfu service along with this custom service. Is it possible? 

where should implement the service, is it inside my application along with my custom base UUID?

Thanks and Regards,

Sreejith

[Sreejith Sundh]

Hi Amanda, 

The DFU Icon not coming in my app, but when I write 01 (by enabling cccd) on the custom characteristic it automatically switched to dfu mode and I could update dfu (enabling cccd packet update chara) now. Do we expect this same behaviour ? why the dfu icon not shows in the app in beginning? 

anyway dfu function is working properly. It would be great if any explanation on it so that I can fix if any issue there...

Thanks and Regards,

Sreejith

[Amanda Hsieh]

Sreejith Sundh said:

The DFU Icon not coming in my app

Is it the custom app or the nRF Connect app?

-Amanda H.

[Sreejith Sundh]

It is nRF Connect Desktop --> Bluetooth Low Energy  (with Dongle), the peripheral application is with custom services and characteristics (I used the buttlonless dfu example as template and made a custom service and characteristics for dfu). In total I am able to do dfu by writing 0x01 in to my custom characteristics (trigger) so the peripheral switches to dfu mode. but the dfu icon not shows in my custom application but it appears after switching to dfu mode.

-Sreejith

[Sreejith Sundh]

Amanda Hsieh said:

You can start from the bootloader. See DFU protocol. 

Can I write my own bootloader (DFU protocol) by taking this secure dfu bootloader example as template? whether it works?

Thanks and Regards,

Sreejith

[Amanda Hsieh]

Hi, 

Sreejith Sundh said:

Can I write my own bootloader (DFU protocol) by taking this secure dfu bootloader example as template? whether it works?

You could develop your own bootloader based on our example. 

Sreejith Sundh said:

In total I am able to do dfu by writing 0x01 in to my custom characteristics (trigger) so the peripheral switches to dfu mode. but the dfu icon not shows in my custom application but it appears after switching to dfu mode.

Try to refresh device cache. 

-Amanda H.