https://devzone.nordicsemi.com/f/nordic-q-a/74170/custom-buttonless-bootloader-fails-after-a-power-cycleHello, I was working on buttonless dfu feature. I add buttonless dfu service as shown as ble_app_buttonless_dfu example and i manage to perform a ota dfu on nrf52 devkit with my firmware. But when it comes to my custom board with a bootloaderen-USTelligent Community 13Tue, 20 Apr 2021 07:49:12 GMThttps://devzone.nordicsemi.com/thread/305725?ContentTypeID=1Tue, 20 Apr 2021 07:49:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a1b006f3-2c6c-4208-87dd-65a02118abacsrac<p>Thank you for this quick answer Edvin. It was a perfect shot. It works.</p> <p></p> <p>Thank you for your support.</p> <p></p> <p>Best regars,</p> <p>Sirac</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/305611?ContentTypeID=1Mon, 19 Apr 2021 14:34:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:13dbcf5a-77e7-4c17-9b5b-22699d75588cEdvin<p>Hello,</p> <p>If you are struggling with it entering DFU mode, I suggest you check out the _debug bootloader project (pca10040_s132_ble_debug). Check the log to see the reason why it stays in DFU mode.</p> <p></p> <p>My guess is that the button enter method is enabled in your bootloader, and on your custom board, this may be shorted to ground. Please check the definition in your bootloaders sdk_config.h file:</p> <p>NRF_BL_DFU_ENTER_METHOD_BUTTON and set it to 0, and see if that changes the behavior.</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>