secure dfu over UART - device programmed but application doesn&#39;t runhttps://devzone.nordicsemi.com/f/nordic-q-a/61527/secure-dfu-over-uart---device-programmed-but-application-doesn-t-runI am trying to upload firmware using the secure bootloader over UART onto nRF52840-DK. I managed to upload the precompiled blinky dfu test image using the uart debug bootloader. Now I wanted to upload my own program and failed. The dfu says &quot;Device programmeden-USTelligent Community 13Tue, 19 May 2020 10:36:21 GMTRE: secure dfu over UART - device programmed but application doesn't runhttps://devzone.nordicsemi.com/thread/250663?ContentTypeID=1Tue, 19 May 2020 10:36:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd597ced-1a0b-47ea-9d69-a1f19c37a784MeisterBob<p>I figured it out, the application can&#39;t include an MBR. Here is what I changed. In the example above you need to use the mbr blinky example, for your own app:</p> <p>- add&nbsp;<span>$(SDK_ROOT)/components/softdevice/mbr/headers to INC_DIR<br />- add&nbsp;-DMBR_PRESENT to CFLAGS and ASMFLAGS<br />- change memory layout in&nbsp;.ld file (compare mbr and blank blinky example blinky_gcc_nrf52.ld)</span></p><div style="clear:both;"></div>