Bootloader hex file cannot download in the NRF52833 DK board

[summer]

Hi,i use  the bootloader demo code ,the file path is nRF5_SDK_16.0.0_98a08e2\examples\dfu\secure_bootloader\pca10056_s140_ble\arm5_no_packs ,after I compiled and passed, I used NRF connect to program the hex file,my steps are as follows:

tool: NRF52833 DK        nrf connect

SDK：  nRF5_SDK_16.0.0_98a08e2

First, I used NRF connect to load the file bootloader.hex and s140_nrf52_7.0.1_softdevice.hex,and the nrf connect tool prompt “some of the HEX files have overlapping data”， i want to ask what is this?

[Hung Bui]

Hi Summer, 
It seems the location of the bootloader was pretty wrong. Have you modified the start address of the bootloader ? It should start at 0x78000.

I can see that you were using the project inside PCA10056_s140_ble. This project is for the nRF52840 not the nRF52833. 
Please use the bootloader inside pca10100_s140_ble instead. 

[summer]

Thank you very much，I have solved the problem。