https://devzone.nordicsemi.com/f/nordic-q-a/18861/dfu---gatt-connection-error-0x81-0x85Hi, I am adding DFU service to my app. When I try DFU, 2 GATT errors have occurred. I am using nrf52, sdk11.0 Thanks.en-USTelligent Community 13Mon, 09 Jan 2017 10:11:04 GMThttps://devzone.nordicsemi.com/thread/72853?ContentTypeID=1Mon, 09 Jan 2017 10:11:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ec8e574-bd35-4927-a95a-96b121eaaaefbjorn-spockeli<p>Could you attach your application main file to the question? Could you also upload the firmware image that you used for the update and the command that you used to generate it?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/72851?ContentTypeID=1Mon, 09 Jan 2017 10:00:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0757c578-bd8e-4d88-b184-9f3dc60de68akibo<p>Yes, I added 3 files(dfu_app_handler, ble_dfu, bootloader_util), 3 functions(advertising_stop, app_context_load, reset_prepare) and variables. I want to know when 0x81, 0x85 GATT errors occurred.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/72852?ContentTypeID=1Mon, 09 Jan 2017 08:50:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a17675e-d48e-4820-89fb-c356a4f82f56bjorn-spockeli<p>Hi Kibo, have you added DFU support as described in <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/bledfu_appextending.html?cp=4_0_3_4_3_1_2_1">this</a> guide?</p><div style="clear:both;"></div>