#320: How to update the NanoVNA-H4 firmware using Windows 10 and .DFU file

Warning/Disclaimer: This is the specific process for my NanoVNA-H4, hardware version 4.2. I cannot vouch that this process will work for all units out there - proceed at your own risk. This video shows how to update the NanoVNA-H4 (H is similar) using .DFU firmware files and the Windows 10 DFuSE_Demo tool from ST. Table of Contents and links follow: 0:00 - Introduction 0:18 - Checking your firmware version 0:45 - Firmware file formats 1:06 - Obtain the DfuSe USB Demo updating tool 2:12 - Find your .DFU firmware file 3:20 - Starting the firmware update process 3:42 - Put NanoVNA-H4 into “DFU mode“ and connect to PC 4:16 - Select the DFU file and update the NanoVNA-H4 5:26 - Re-calibrating the touch screen (if necessary) 6:07 - Summary DFUse_Demo: page: Another good resource: