====== bootloader ======

<code>
<info> nrf_bootloader_wdt: WDT is not enabled
<info> app: Entering DFU mode.
<info> app: NRF_DFU_EVT_DFU_INITIALIZED
<info> app: Secure bootloader started
<info> nrf_dfu_settings: Backing up settings page to address 0xFE000.
<info> app: No firmware to activate.
<warning> nrf_dfu_settings: No additional data erased
<info> nrf_dfu_settings: Backing up settings page to address 0xFE000.
</code>

[[https://devzone.nordicsemi.com/f/nordic-q-a/90417/nrf52833-stays-in-bootloader-mode-getting-error-no-firmware-to-activate|Nrf52833 stays in bootloader mode. Getting error No firmware to activate.]]