What can I do if I want to dfu Bootloader and Application

[Jeong Hyun Seok]

1. my company already have firmware with nRF51 and SDK11
2. recently, we made new Firmware

• watchdog timer feature
• so we modified application and bootloader

now, we want to make zip file for DFU. so end user can upgrade their firmware of device.

Question 1. how can I make a zip file for bootloader+application version

• in manual, it said, we cannot make BL+APP version zip. is it right?

Question 2. our old firmware had to make hex file with BL+SD+APP and "app_valid_setting_apply.hex" using mergehex.exe

as I know "app_valid_setting_apply.hex" is provided from Nordic and it prevents loading bootloader instead of Application, just after firmware programming.

If I had to make BL+APP version zip file, how can I make it with "app_valid_setting_apply" using nrfutil.exe

[Hung Bui]

Hi,

Have you followed my suggestion to do BL and Application update separately first ? Update BL and then Application ?

Have you tried to flash your new application + new bootloader using the cable (not DFU) and verify that it's working ?

You mentioned device not working meaning DFU process worked ? Have you tried to read the hex out and compare to if you flash it using the cable ?