nRF52 with Smart Remote 3 ,Bootloader can't start the APP

[mm614]

nRFready Smart Remote 3 nRF52 v1.1(PCA63519)

SDK: nRF5x SDK v12.2.0

IDE:Keil 5

Hi,I am trying to flash the whole package of SR3.

1.Flash the s132_nrf52_3.0.0_softdevice

2.Flash the application PCA63519-SR3_nRF52_Shield in nRFready Smart Remote 3 nRF52 v1.1\nRF5x SDKv12.2.0\examples\ble_peripheral\smart_remote_3_nrf52\Projects\Firmware\arm5_no_packs_build (remote control's led starts blinking)

3.Flash the bootloader from the same project ,(Projects\Bootloader\arm5_no_packs_build) and the device goes into DFU mode ,never goes back to application.

Then I DFU OTA the same application only by nRF toolbox for give it a try,and it works, the device backs to the application mode.

So what step in 1,2,3 I am doing wrong causing the bootloader maintaining in DFU mode? Also find that there is another bootloader calls secure_bootloader with size 52kB, what is the different? which bootloader should I use properly?

Thanks.

[Hung Bui]

Hi,

The bootloader was designed to ignore pre-flashed application and start in bootloader mode first. If you want to modify that, please try to follow the instruction at Appendix 1 at the bottom here.