Secure DFU bootloader: application not starting

[mr91]

Hello,

I have a problem with secure bootloader. what I did:

1. Flash SoftDevice 130 using nRFgo Studio.
2. Compiling \examples\dfu\bootloader_secure\ (i removed the error regarding the key).
3. Flashing the bootloader with Keil (using nrfjprog.exe for flashing).

Unfortunately, the bootloader seems not to run. There is no advertisement "DfuTarg". When I compile the buttonless dfu example and flash it with Keil, there is still no response. So the bootloader does not start the application. There are no debug messages over UART either.

However, when I flash the precompiled debug version (secure_dfu_secure_dfu_ble_s130_pca10028_debug.hex), the bootloader is advertising as "DfuTarg". When I load an application (using Keil or DFU with nrfConnect´), it does not leave the bootloader mode.

Can you tell me whats wrong?

Thank you!

Edit: I use SD130 on nRF51

[Hung Bui]

Hi,

The bootloader was made so that you would need to program the application via DFU bootloader to make it start.

If you don't want to use the DFU bootloader to upload your first application, and prefer to use the programmer instead, you need to alter the bootloader setting in flash to tell the bootloader to start the application. You can generate a bootloader setting hex file then write it to flash to do that. Please have a look here.

[daniel77]

I followed mr91's steps above and was able to boot into "Nordic_Template" advertised in IOS nRF Connect. I was using nRF51 DK PCA10028 SDK 12.2 secure bootloader and experimental buttonless DFU. However, I am not able to find the DFU Service within "Nordic_Template" services. I wanted to perform a buttonless OTA DFU via the app by using nRF Toolbox again. How to make it happen?