10> <info> app: Inside main
10> 
10> <info> app: Bootloader -1
10> Settings -1 
10>  Application -1
10> 
10> <debug> app: In nrf_bootloader_init
10> 
10> <debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
10> 
10> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
10> 
10> <warning> nrf_dfu_settings: Resetting bootloader settings since neither the settings page nor the backup are valid (CRC error).
10> 
10> <debug> nrf_dfu_settings: Writing settings...
10> 
10> <debug> nrf_dfu_settings: Erasing old settings at: 0x0007F000
10> 
10> <debug> nrf_dfu_flash: nrf_fstorage_erase(addr=0x0x0007F000, len=1 pages), queue usage: 0
10> 
10> <debug> nrf_dfu_flash: Flash erase success: addr=0x0007F000, pending 0
10> 
10> <debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x0007F000, src=0x2000073C, len=896 bytes), queue usage: 1
10> 
10> <debug> nrf_dfu_flash: Flash write success: addr=0x0007F000, pending 0
10> 
10> <info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
10> 
10> <debug> nrf_dfu_settings: Writing settings...
10> 
10> <debug> nrf_dfu_settings: Erasing old settings at: 0x0007E000
10> 
10> <debug> nrf_dfu_flash: nrf_fstorage_erase(addr=0x0x0007E000, len=1 pages), queue usage: 1
10> 
10> <debug> nrf_dfu_flash: Flash erase success: addr=0x0007E000, pending 0
10> 
10> <debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x0007E000, src=0x20000ABC, len=896 bytes), queue usage: 1
10> 
10> <debug> nrf_dfu_flash: Flash write success: addr=0x0007E000, pending 0
10> 
10> <debug> app: Enter nrf_bootloader_fw_activate
10> 
10> <info> app: No firmware to activate.
10> 
10> <info> app: Boot validation failed. No valid app to boot.
10> 
10> <debug> app: DFU mode because app is not valid.
10> 
10> <info> nrf_bootloader_wdt: WDT is not enabled
10> 
10> <debug> app: in weak nrf_dfu_init_user
10> 
10> <debug> app: timer_stop (0x20000020)
10> 
10> <debug> app: timer_activate (0x20000020)
10> 
10> <info> app: Entering DFU mode.
10> 
10> <debug> app: Initializing transports (found: 1)
10> 
10> <debug> nrf_dfu_serial_uart: serial_dfu_transport_init()
10> 
10> <debug> nrf_dfu_serial_uart: serial_dfu_transport_init() completed
10> 
10> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
10> 
10> <debug> app: Enter main loop
10>