https://devzone.nordicsemi.com/f/nordic-q-a/77188/after-dfu-application-successfully-updates-application-is-not-booting-after-power-resetHello, We are working on the nrf52840 custom board in that We trying to update firmware via DFU. Problem definition : First we update firmware via DFU application boot successfully Many times we can update firmware But after power reset, firmwareen-USTelligent Community 13Wed, 07 Jul 2021 22:18:59 GMThttps://devzone.nordicsemi.com/thread/319037?ContentTypeID=1Wed, 07 Jul 2021 22:18:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e73c23a1-971e-43c7-a2a6-b096bba3d9a9Marjeris Romero<p>Hi,</p> <p>Are you testing on a nordic dev kit or a custom board?</p> <p>Have you checked that you are not using <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Fgroup__nrf__bootloader__config.html&amp;anchor=gaa89bea64482f2c4d83919922e5e84bc3">NRF_BL_DFU_ENTER_METHOD_PINRESET </a>to enter DFU mode on pin reset automatically?</p> <p>You can also check inside dfu_enter_check() function to see in which conditions the bootloader will go into DFU mode or not.</p> <p>Best regards,</p> <p>Marjeris</p><div style="clear:both;"></div>