https://devzone.nordicsemi.com/f/nordic-q-a/23561/upgrade-ota-upgrade-otaHello all, Please tel me steps for upgrading the firmware Over The Air(OTA) on nrf52840DK ...i gone through documents but not getting?en-USTelligent Community 13Tue, 18 Jul 2017 13:43:25 GMThttps://devzone.nordicsemi.com/thread/92552?ContentTypeID=1Tue, 18 Jul 2017 13:43:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b862fee3-68a2-430e-aab8-e72450d58cdbbjorn-spockeli<p>You need to flash both the bootloader (found in examples\dfu\bootloader_secure_ble\pca10056) and the S140 SoftDevice (found in components\softdevice\s140\hex) to your board in order to perform a DFU with the sample images found in examples\dfu\ble_dfu_send_hex\test_images_update_nrf52840.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/92551?ContentTypeID=1Mon, 17 Jul 2017 10:04:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0db6436a-ad85-4c86-8372-2bb208691f75pavan<p>Hello, I am working on nrf52840 PDK initialy i erased the board and dumped uart application, now i transferred softdevice he file to my smartphone from this link E:\Nordic\Nrf52_840_PDK\nRF5_SDK_13.0.0_04a0bfd\components\softdevice\s140\hex , and using nrftoolbox app in DFU section i loaded the file but when i select upload it showing error like &quot;DFU service not found&quot;, please help me to overcome this issue.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/92550?ContentTypeID=1Mon, 17 Jul 2017 09:13:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2ec78ba-8fa0-4327-80c1-b3178c7e30bebjorn-spockeli<p>Hi Pavan,</p> <p>the steps to perform DFU with the sample DFU images in the SDK are given on <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v13.1.0/ble_sdk_app_dfu_bootloader.html?cp=4_0_0_4_3_1_4#ble_sdk_app_dfu_bootloader_test">this</a> Infocenter page.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>