Secure bootloader example not working

[firas_hamdi]

Hi all,

I'm trying to add to our application BLE DFU feature. Therefore I'm testing first the secure bootloader example provided in the SDK v16.0.0

I managed to build the bootloader successfully and I can see the target ready for DFU and the package is sent succefully. However, the application doesn't start after the system reset although I can see in the memory layout ( using nrf connect) that the new firmware is installed. 

My question is if I'm missing something concerning the DFU mode that doesn't make the application start?

Thanks in advance

[Einar Thorsrud]

Hi,

The application should be started after a successful DFU. Can you try with the debug bootloader and test again? All example bootloaders have an equivalent project sufficed with "_debug", and these have extensive RTT logging. In most cases, the log will give a good indication of what is going on.

Generally, the bootloader will start the application if a flag indicates that it is present and the hash of the application matches a stored hash. If not, the bootloader will enter DFU mode.