https://devzone.nordicsemi.com/f/nordic-q-a/92469/how-do-i-replace-the-nrfutil-tool-on-dfu-usbHi, When using USB to upgrade, it is necessary to use NRFUtil tool to transfer the upgrade package, may I ask what download protocol it includes? Our requirement is to make a tool like NRFUtil by ourselves, instead of using NRFUtil for upgrade, woulden-USTelligent Community 13Thu, 03 Nov 2022 13:47:33 GMThttps://devzone.nordicsemi.com/thread/393912?ContentTypeID=1Thu, 03 Nov 2022 13:47:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5eedf69c-d466-4291-9c3d-726c94f899c4Simonr<p>Glad to hear that, let&#39;s close this case and you can make a new one if you run into any further trouble!</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/393773?ContentTypeID=1Thu, 03 Nov 2022 06:04:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:71dcd9f9-8fb4-4192-a00c-ff6812955f8fstars<p>Hi，<span>Simon</span></p> <p><span>Thank you for your reply.&nbsp;I decided to use nrfutil for the upgrade.</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/388756?ContentTypeID=1Fri, 30 Sep 2022 11:51:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:91a52b05-f997-472e-a3ed-11f865f8c633Simonr<p>Hi</p> <p><a href="https://github.com/NordicSemiconductor/pc-nrfutil">nRFUtil</a>&nbsp;is a Python package. It has command-line utility that supports DFU and cryptographic functionalities.You can also see the <a href="https://infocenter.nordicsemi.com/topic/ug_nrfutil/UG/nrfutil/nrfutil_intro.html">nRF Util page in our Infocenter with the complete User Guide here</a>.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>