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

[Amanda Hsieh]

Hi, 

See Buttonless Secure DFU Service, and example in this post. 

-Amanda H.

[Sreejith Sundh]

Hi,

Many thanks for the detailed explanation. Does the change in base uuid with mine custom uuid (also for services and characteristics) in your mentioned example works?

Also I would like to add some more custom characteristics in to the dfu services. if so where should I add these characteristics in the buttonless example?

Thanks and Regards,

Sreejith  

[Amanda Hsieh]

Hi, 

Sreejith Sundh said:

Does the change in base uuid with mine custom uuid (also for services and characteristics) in your mentioned example works?

Unfortunately, no. 

Sreejith Sundh said:

Also I would like to add some more custom characteristics in to the dfu services. if so where should I add these characteristics in the buttonless example?

Take a look at this post and Bluetooth low energy Characteristics, a beginner's tutorial . 

-Amanda H. 

[Sreejith Sundh]

Hi,

Amanda Hsieh said:

Unfortunately, no. 

Ok, That means I have to write my own DFU service code. Isn't it? but can I refere the buttonless DFU example in order to make a custom DFU service?

Thanks for your responses.

Thanks and Regards,

Sreejith

[Amanda Hsieh]

Hi, 

That's correct. Alternaltly, you can add a new serverice with DFU service into your application. That's up to your project. 

-Amanda H.

[Sreejith Sundh]

Hallo Amanda,

As I wish to include my own custom DFU Protocol, which example would be helpful to refer as template? Buttonless DFU or the secure bootloader? because I have to add some more control points (opcodes) in to the DFU Process.

Thanks and Regards,

Sreejith

[Amanda Hsieh]

Hi, 

You can start from the bootloader. See DFU protocol. 

Regards,
Amanda H.

[Sreejith Sundh]

Hi Amanda,

I have deleted my previous post because I made the mistake in my code that is without initializing the peer manager I have started with service_init(). I found the issue and it solved but when I continue with debug by following your instruction in the post (nRF52 DK Failed to add BLE OTA DFU to the example project ble_app_uart - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)) I am getting following error.. Is this usual error? I meant when I add with bootloader does it solve?

Thanks and looking forward for your support.

Thanks and Regards,

Sreejith

[Sreejith Sundh]

HI,

Sreejith Sundh said:

Is this usual error? I meant when I add with bootloader does it solve?

When I added bootloader this problem solved. also I required to update the sdk_config.h in nrf_bootloader with the following 

#ifndef NRF_DFU_BLE_REQUIRES_BONDS
#define NRF_DFU_BLE_REQUIRES_BONDS 1
#endif

while my dfu required bonding...

Now it is compiled successfully without any error but I am not getting the DFU symbol on my nrf connect desktop. How can it happen? I followed the exact steps which you have suggested.

(DfU) icon not showing...

Thanks and Regards,