nRF52 DFU reading current firmware version(buttonless)

[Stefan Tsenev]

Dear Nordic Team,

I am working on a product which implements OTA DFU(buttonless DFU inside). So far everything works fine and the updates are working.

The question is more for internal convenience: Is there a way to see the current Application firmware version already running on the device?

I am thinking on putting it into the advertisement packet or in a custom characteristics and it will be great if you can advise me how to retrieve it.

Kind regards,

Stefan Tsenev

[Stefan Tsenev]

Apologies, It seems that the question is a little bit irrelevant - obviously it is more convenient to maintain and show the app version from within the app itself.

Just for the matter of understanding and reserving this for future use, I would like to modify the question to:

What is the address in the NVM where the bootloader stores the application version and what is the initial value?

Kind regards

[Sigurd]

Stefan Tsenev said:

What is the address in the NVM where the bootloader stores the application version and what is the initial value?

Stored in the bootloader settings page. See memory layout here. You set the value when you generate the bootloader settings page.

I think you can read the app version from the app itself like this:

     nrf_dfu_settings_t my_dfu_settings;
     memcpy(&my_dfu_settings, (uint32_t *)BOOTLOADER_SETTINGS_ADDRESS, sizeof(nrf_dfu_settings_t)); 

     uint32_t my_app_version = my_dfu_settings.app_version;

[Stefan Tsenev]

Thank you.