https://devzone.nordicsemi.com/f/nordic-q-a/46072/bootloader-differences-between-nrf52HI, Im using nRF5_SDK_15.3.0_59ac345 - SDK and two different bootloaders. The first one is - sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex (which is boot+soft 6.1.1+app) in secure_dfu_test_images folder. en-USTelligent Community 13Thu, 11 Apr 2019 13:04:10 GMThttps://devzone.nordicsemi.com/thread/181619?ContentTypeID=1Thu, 11 Apr 2019 13:04:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d855dbc8-72c7-46f6-b22b-83e9ea0af3d8bjorn-spockeli<p>Happy to help.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/181568?ContentTypeID=1Thu, 11 Apr 2019 11:52:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:56017f75-31e6-41b9-8750-a5ad5b8fbc66dor<p>Great, i will try that.</p> <p>Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/181564?ContentTypeID=1Thu, 11 Apr 2019 11:46:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bb9f0c55-67e7-4b88-9dbc-f72b0d756cd9bjorn-spockeli<p>The&nbsp;precompiled hex image (<span>sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex) uses the bootloader from the&nbsp;secure_bootloader_ble_s140_pca10056 folder.&nbsp;</span></p> <p><span>In order to get the bootloader to jump to the application and not stay in bootloader mode, you need to generate the bootloader settings page that contains the CRC of the application. Please follow the&nbsp;<a href="https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-3-0/ble_sdk_app_dfu_bootloader?1862#ble_sdk_app_dfu_bootloader_test">Testing</a>&nbsp;instructions in the Bootloader example documentation.</span></p> <p>Best regards</p> <p>Bjørn&nbsp;&nbsp;</p><div style="clear:both;"></div>