https://devzone.nordicsemi.com/f/nordic-q-a/54548/dfu-service-ble-uart-exampleHi, I am trying to integrate the DFU service into the ble_app_uart example. I am using NRF51822 with SDK 11. I was able to successfully run the ble_app_hrs with dfu. So, I have pretty much copied all the DFU related content from the hrs example to uarten-USTelligent Community 13Wed, 20 Nov 2019 11:59:47 GMThttps://devzone.nordicsemi.com/thread/221048?ContentTypeID=1Wed, 20 Nov 2019 11:59:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bba46937-fad6-499e-b99c-f3e12dbcd9f6Vidar Berg<p>Hi,</p> <p>The application should not have any impact on the DFU process inside the bootloader.&nbsp;Maybe the reasons for the unsuccessful DFU were different, and that is why you&#39;re seeing the different behavior? The bootloader will for instance time out and reset after 60 seconds if the controller is disconnected:&nbsp;&nbsp;<a title="Idle mode procedure" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/bledfu_transport_bleprofile.html?cp=6_5_11_4_3_1_4_0_1_2#ota_idle_mode_procedure">Idle mode procedure</a>.The controller may also send the &quot;system reset&quot;&nbsp; command to abort DFU.&nbsp;</p><div style="clear:both;"></div>