52832 upgrade bootloader via nrf connect app (nfu)

[lyman]

dear 

in the case :our product is produced in factory, we want to upgrade new app via phone,

but the crc of new app is not equal with the origin one which store in the bootsetting.

so,it is a tough problem.  we want to at first change boot loader first  and then upgrade app next,

how can i upgrade bootloader at first  by phone app ??? 

we can not connect 52832 with pc，the only available tools is phone,i think if pc can be used,it is easy.

but in actual  we only have phone.

[tesc]

Hi,

I think there are some misunderstandings here.

If you use over-the-air DFU update, you can do that either with phone app or with PC tools such as nRF Connect for Desktop or nrfutil.

The only thing you would need bootloader settings page for, is if you program the app directly. In that case, the bootloader settings page must be generated especially for the app.

If you update the application using DFU, the bootloader will replace the CRC as part of the DFU process.

So:
1) Is it still an option to download the firmware using a programmer?

If yes, you should generate a new bootloader settings page, erase the flash pages for bootloader settings page and application, and download the new bootloader settings page and application, all of this using a programmer.

2) Alternatively you can use smartphone or PC to perform DFU in order to upload the new application.

Regards,
Terje