https://devzone.nordicsemi.com/f/nordic-q-a/82141/mcuboot-on-nrf52840-dongle-using-external-debuggerHi, I am using a nrf52840 dongle with a jlink mini on the latest nRF Connect. I have modified the board dts file to reflect that I am using an external debugger: include &quot;fstab_debugger.dts&quot; and I have also set BOARD_HAS_NRF5_BOOTLOADER to &quot;n&quot;. Runningen-USTelligent Community 13Sun, 28 Nov 2021 21:52:01 GMThttps://devzone.nordicsemi.com/thread/340972?ContentTypeID=1Sun, 28 Nov 2021 21:52:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdd655d1-b790-4316-be79-cb32c7bb04aeandrobi<p>I finally found the &quot;boards&quot; directory in mcuboot/boot/zephyr which has a config file for the dongle that activates configs related with DFU over serial. Deactivating these settings I can now compile. But I still don&#39;t quite understand why these settings are there, the &quot;standard&quot; way of using the dongle is with the nrf bootloader, and in this case no mcuboot is needed, right? So why providing additonal configs for this board in mcuboot (that don&#39;t work out of the box)?&nbsp;</p><div style="clear:both;"></div>