Upgrade NanoVNA use DFU
https://www.nanovna.com.br/index.php/__trashed-2/
DOWNLOAD DFU FILES
DFU Util Win 32 v0.8
DFU Util Win x64 v0.9
Zadig v2.4 PARA INSTALAR O DRIVER DO NANOVNA
NanoVNA Saver v0.2.2-1
NanoVNA-AA v0.4.5-4
NanoVNA v0.4.5-4
https://github.com/hugen79/NanoVNA-H
https://github.com/ttrftech/NanoVNA
https://groups.io/g/nanovna-users/attachment/381/0/NanoVNA%20DFU%20Firmware%20Upgrade%20Guide.pdf
Upgrade NanoVNA use DFU 1.：DFU is a SW is for programming the STM32 via the USB (UM0412) The package contains all binaries and source code for DfuSe USB device firmware upgrade (DFU) software, including the demonstration, debugging GUIs and protocol layers. https://www.st.com/en/development-tools/stsw-stm32080.html?s_searchtype=keyword It includes the DFU driver compatible with the latest Microsoft®OS. DfuSe utility can be used to interact with the STM32 system memory bootloader or any In-Application Programming (IAP) firmware, running from the user Flash, thus allowing internal memories programming through USB. See this video. https://www.youtube.com/watch?v=Kx7yWVi8kbU&list=PLnMKNibPkDnF97QnU OFGirl1q0G_4VdDc&index=28 2：Now we use the .DFU file with the DfuSe Demonstration, to program the device. We provide 3 firmware on the network hard drive, you can choose the appropriate brush in accordance with the relevant tutorials, 3 firmware differences are as follows: nanoVNA_300_ch： 50K-300MHz，5*7 Bitmap font，4 tracks nanoVNA_900_ch：50K-900MHz，5*7 Bitmap font，4 tracks(Default) nanoVNA_900_aa：50K-900MHz，7*13 Bitmap font，2 tracks (Antenna Analyzer) Follows the steps below. You must put in DFU mode your NanoVNA and is necessary connect the BOOT pin to VDD pin, see below Orange circle. 3. Now connect your NanoVNA to the PC and switch it on. 4. Install the driver correctly： 5. Run the DfuSe Demonstration and download .DFU file on your eval-board. (If you upgrade 4 tracks firmware from 2 tracks firmware, you must first reprogramming “nanoVNA_900_AA_xxxxxxxx.dfu” to clear user data.) 6. Upgrade successful! 7，Now remove the boot jumper and reset NanoVNA. Recalibrate the NanoVNA. https://gen111.taobao.com/ 2019-5-31
