Secure Bootloader example code is not working in SDK V12.3.0 with nrf51822

[NIDHIN K]

I am using SDK v12.3.0 for nrf 51822 chip. I am working on hrs example with some custom modifications, so i need to to update application through OTA, i have used bootloader secure example for dfu but its not working 

[Hung Bui]

Hi,

Please provide more information on what exactly happened, how did you test (step by step). Please try to get the logging from the bootloader, any sniffer trace if possible. 
Have you tried to test with only the bootloader, not with the hrs ( I assume you are trying to do buttonless DFU ? )

[NIDHIN K]

HI Hung Bui,

I am using bootloader_secure example code and trying to implement buttonless DFU. I am using a custom nrf51822 board , SoftDevice s130. after compiling this code i just flashing DFU binary and softdevice , but its not showing the dfu device on nrfConnect ( Actually it should show DFU device right ?), i haven't tried to flash hrs because dfu itself also is not detecting in nrfConnect

[Hung Bui]

Hi Nidhin, 
I would suggest to use the _debug version of the bootloader (you need to do a chip erase if you change the bootloader ) and step into the code to check where it crashed. 
Do you have the LFCLK crystal on the nRF51 ? If you don't you need to configure the bootloader to use the RC LFCLK instead of the crystal.