Problem to upgrade bootloader by application

[Louis]

Need to upgrade bootloader by application code. I have finished to program bootloader image to FLASH. Content is verified correct, comparing to SRC. However, the bootloader seems to be empty after rebooting the device. nRF Go Studio cannot see it as well. I assume that I miss to update MBR. How can I do that? Any simple programming guide for reference?

Thanks.

[Hung Bui]

Hi Louis,

Could you let me know a little bit more on which bootloader and which application are you testing with ? Which SDK ? Are you using our DFU bootloader or you wrote your own ?

What do you mean "nRFGo Studio cannot see it" ?

You don't have to update MBR.

Please list the step you did to test updating the bootloader. I assume you can update the application with no problem.