https://devzone.nordicsemi.com/f/nordic-q-a/28463/secure-ble-dfu-example-doesn-t-runI am working through link this tutorial and I&#39;ve been able to successfully complete the steps up to D3. I&#39;m using the bootloader_secure_ble example from SDK13 on an nRF52840 with SoftDevice s140. I made sure to follow the steps correctly--erase theen-USTelligent Community 13Thu, 05 Oct 2017 14:49:04 GMThttps://devzone.nordicsemi.com/thread/112503?ContentTypeID=1Thu, 05 Oct 2017 14:49:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:de5eabed-2dc8-4f4a-892d-55080e529ad0zolotiyeruki<ol> <li>yes. I programmed the softdevice using nRFgo studio, then programmed the bootloader with nrfjprog</li> <li>I used nrfjprog to program the bootloader. I thought I was resetting it afterward by pressing the reset button on the PDK, but that didn&#39;t work. Using the nrfjprog -r command worked, though!</li> </ol><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/112501?ContentTypeID=1Thu, 05 Oct 2017 07:11:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:82be71cf-7a62-4e06-b8e5-50b4960e1538MartinBL<p>Yes it should. Maybe you can try to debug like suggested <a href="https://devzone.nordicsemi.com/question/169623/bootloader_secure_ble-with-nrf_log-rtt/">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/112500?ContentTypeID=1Thu, 05 Oct 2017 06:15:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8cc61525-eafb-44ca-afc9-1f1ff5b96970morgan<p>If no application is programmed, shouldn&#39;t it go into bootloader mode?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/112502?ContentTypeID=1Mon, 02 Oct 2017 09:03:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ce84083-0e2e-49ca-ad55-7d9a61f03276MartinBL<ol> <li>Are you only programming bootloader and softdevice? No application?</li> <li>Are you using nrfjprog to program the device? Have you remembered to reset the device after programming (nrfjprog -r)?</li> </ol><div style="clear:both;"></div>