https://devzone.nordicsemi.com/f/nordic-q-a/9586/dfu-connection-failedI included the DFU service in my project. With the MCP on my computer it is working fine. But when I try to perform the DFU over the MCP(v.3.4.1) app on my android device, then it will not work. Here the error log: My Setup: -SDK8.1 en-USTelligent Community 13Tue, 06 Oct 2015 11:43:11 GMThttps://devzone.nordicsemi.com/thread/35407?ContentTypeID=1Tue, 06 Oct 2015 11:43:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e382a119-27b2-4c93-aeaa-722e57e13e8fInspectron<p>I tested it without application and this is working. But when I try it to update again(when application is already on chip), then it wont work. Yes, IS_SRVC_CHANGED_CHARACT_PRESENT is set to 1. I will now test with ble_app_hrs_withdfu example.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/35406?ContentTypeID=1Tue, 06 Oct 2015 11:34:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4615c4b2-66f8-4b13-a896-7bbb46199afbHung Bui<p>Hi Inspectron,</p> <p>If you only test with the bootloader (with no application) would you be able to update your application ? Have you set IS_SRVC_CHANGED_CHARACT_PRESENT to 1 in main.c of your application ?</p> <p>Have you tried to test with our ble_app_hrs_withdfu example ?</p><div style="clear:both;"></div>