https://devzone.nordicsemi.com/f/nordic-q-a/45399/problem-with-dfu-implementionHello, We am using nrf52840.The SDK is 15.2.0.I successfully combined usb example code with buttonless dfu. I could update more than once and it worked fine. Depending on our application we have included some more files and functions to our code.en-USTelligent Community 13Wed, 27 Mar 2019 13:45:52 GMThttps://devzone.nordicsemi.com/thread/178694?ContentTypeID=1Wed, 27 Mar 2019 13:45:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:068a8afe-36c1-469b-b8b4-a65ae3594441AndreasF<p>Hi Shilpa.</p> <p>Can you please explain more in details on the update process?</p> <p>What type of bootloader do you have?</p> <p>What does you packet contains?</p> <p>How do you generate the packet?</p> <p></p> <p>[quote user=""][/quote]</p> <p>And also when debugging is done the code get stucked at this point.</p> <p>err_code = ble_dfu_buttonless_async_svci_init();<br />APP_ERROR_CHECK(err_code);</p> <p></p> <p>&nbsp;What error code do you get?</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>