When there is no program on nRF52840 development board, burn it into bootloader and application, protocol stack and setting.hexhttps://devzone.nordicsemi.com/f/nordic-q-a/58548/when-there-is-no-program-on-nrf52840-development-board-burn-it-into-bootloader-and-application-protocol-stack-and-setting-hexNRF52840 development board does not have any programs when burning into bootloader and application and protocol stack and settings.hex, Why do you need an OTA to enter the application when you first start it? Otherwise, you can&#39;t work. You can alsoen-USTelligent Community 13Mon, 02 Mar 2020 12:03:08 GMTRE: When there is no program on nRF52840 development board, burn it into bootloader and application, protocol stack and setting.hexhttps://devzone.nordicsemi.com/thread/237417?ContentTypeID=1Mon, 02 Mar 2020 12:03:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7d6e860b-7edd-4833-8fc4-b764e1dfee67bjorn-spockeli<p>So the nRF52840 does not jump to the application if you flash the SoftDevice. Bootloader + Settings.hex and the Application? If that is the case, how are you generating the settings? Which order are you flashing the hex files? Are you merging the settings hex with the bootloader hex file?&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>