https://devzone.nordicsemi.com/f/nordic-q-a/50714/unable-to-ble-dfu-with-sd-3-0-0-and-sdk-12-1-0I am trying to run the example for secure bootloader debug present in SDK 12.1.0 and SD S132 v3.0.0 on NRF52832 with ARM GCC The aforementioned example &quot;nRF5_SDK_12.1.0_0d23e2a/examples/dfu/bootloader_secure/pca10040&quot; When I try to DFU from nRF Connecten-USTelligent Community 13Wed, 07 Aug 2019 12:09:18 GMThttps://devzone.nordicsemi.com/thread/202823?ContentTypeID=1Wed, 07 Aug 2019 12:09:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:11267bbc-98d1-45f6-8770-2698e40992c9bjorn-spockeli<p>Hi Naveenj,&nbsp;</p> <p>can you post the log from the Android nRF Connect app? Even better would be a sniffer trace captured with <a href="https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Sniffer/Download#infotabs">nRF Sniffe</a>.</p> <p>Best regards</p> <p>Bjørn&nbsp;</p><div style="clear:both;"></div>