https://devzone.nordicsemi.com/f/nordic-q-a/92442/it-is-possible-to-upload-dfu-bootloader-zip-file-on-dfu-bootloader-running-app-dfutargNRF52 I try to upload bootloader using DFU bootloader but when i upload zip file code updated but after that nothing work not advertising so can you help me.en-USTelligent Community 13Fri, 30 Sep 2022 09:07:10 GMThttps://devzone.nordicsemi.com/thread/388710?ContentTypeID=1Fri, 30 Sep 2022 09:07:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:491951f9-9d1d-4553-9f0b-3c91e498b186saurabh<p>i closed this because now i understand what actually required and how it work thank you&nbsp;</p> <p><a href="https://devzone.nordicsemi.com/guides/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader#h61sjziauupw1j397q9s9ldr01q4j6d5">devzone.nordicsemi.com/.../getting-started-with-nordics-secure-dfu-bootloader</a></p><div style="clear:both;"></div>