https://devzone.nordicsemi.com/f/nordic-q-a/12178/dfu-rtx-is-it-possibleI have the ble_app_hrs example working well with DFU. When I take main.c from the example code and put it into an RTX project, the DFU stops working. Symptom: nrfToolbox starts &quot;switching to DFU Mode&quot;, the led changes once on the pca10028 board,en-USTelligent Community 13Mon, 29 Feb 2016 00:54:54 GMThttps://devzone.nordicsemi.com/thread/46081?ContentTypeID=1Mon, 29 Feb 2016 00:54:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bfdb0cc1-3c60-4c62-862b-13ca77c432d5dav lion<p>Good Idea, Thanks!. Starting with the app_hrs_rtx sample project and adding dfu to it does work. Now I just have to figure out what didn&#39;t work going the other way.....</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/46082?ContentTypeID=1Fri, 26 Feb 2016 23:30:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:93702ab9-2ba1-4a80-8a56-c6c311ff1c4dEthanHunt<p>Yes, it should work exactly fine, as I have tested a code myself which have RTX os along with DFU. Try reverse thing that will be more easy. I mean take app_hrs_rtx sample project and then add DFU on top of that.</p><div style="clear:both;"></div>