https://devzone.nordicsemi.com/f/nordic-q-a/68695/usb-dfu-with-nrf-connect-sdkHello sir, I was referred this link ( https://github.com/zephyrproject-rtos/zephyr/issues/29921 ) to do USB DFU on nRF52840-DK, but I am facing an issue in this code is that the code doesn&#39;t run after second time power reset. So, I request you to provideen-USTelligent Community 13Tue, 24 Nov 2020 23:20:15 GMThttps://devzone.nordicsemi.com/thread/281680?ContentTypeID=1Tue, 24 Nov 2020 23:20:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37b0d2a2-2ebc-4151-827c-23ba289ade5eSimon<p>Include <a href="https://github.com/nrfconnect/sdk-zephyr/blob/master/include/dfu/mcuboot.h">dfu/mcuboot.h</a> to your main application (the one you are uploading), and call&nbsp;<a href="https://github.com/nrfconnect/sdk-zephyr/blob/v2.4.0-ncs2-rc1/include/dfu/mcuboot.h#L137-L149">boot_write_img_confirmed()</a>&nbsp;after all the initialization is complete, this will avoid rollback. Check out how it&#39;s done in the serial lte modem application:</p> <ul> <li><a href="https://github.com/nrfconnect/sdk-nrf/blob/v1.4.0/applications/serial_lte_modem/src/main.c#L20">Including dfu/mcuboot.h</a></li> <li><a href="https://github.com/nrfconnect/sdk-nrf/blob/v1.4.0/applications/serial_lte_modem/src/main.c#L189-L192">Calling boot_write_img_confirmed()</a></li> </ul> <p>Is this approach acceptable, or do you have to confirm it externally via USB?</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>