To be able to upgrade FW through UART, a bootloader for nrf51822 is required in my project. I have tried out the example bootloader in SDK. But this example is using softdevice as document saying "In the Bootloader/DFU example, the S110 SoftDevice is used and thus it must be present a this address" . Softdevice will take too much code space and will not be used in main application.
Is there any bootloader example that does not need softdevice? Or any example code or documents for reference if I implement one?
Thanks.