https://devzone.nordicsemi.com/f/nordic-q-a/23029/nrf51-s110-v8-buttonless-dfu-otaHi, I am facing issue on nRF51 s110 buttonless DFU. We are initiating DFU using nRF Connect and the device jumps from app to bootloader. On my Android Phone using nRF Connect I can see the DfuTarg. But nRF Connect stays at connecting state and eventuallyen-USTelligent Community 13Mon, 26 Jun 2017 11:53:51 GMThttps://devzone.nordicsemi.com/thread/90591?ContentTypeID=1Mon, 26 Jun 2017 11:53:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:46c3c13a-2745-42fd-a77f-e6cf3977c099Hung Bui<p>nRFConnect should be compatible with all bootloader versions. I would assume if you open nRFConnect again and do DFU after the device advertise as DFUTarg it would work ?</p> <p>Have you modified anything in the bootloader and the buttonless DFU example ?</p> <p>Could you capture a <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF-Sniffer/">sniffer trace</a> ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/90592?ContentTypeID=1Sat, 24 Jun 2017 13:07:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e7cb3410-f0d2-4b32-b564-efda7b9ca4cfWojtek<p>I think newest version of nRF Connect is not compatible with old bootloader available in SDK 8. You may try to:</p> <ul> <li>Find some older version of nRF Master Control Panel (previous name of nRF Connect) and try with them - some version should work, but cannot tell you which one.</li> <li>Modify bootloader so it is compatible with the new one available in newest SDK</li> <li>Write your own app for DFU (instead of nRF Connect)</li> </ul><div style="clear:both;"></div>