Beware of cheap underperforming clones

As of 2022 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.

See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.

NanoVNA V2 Forum

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NanoVNA v2 - Touchscreen menu not working correctly after loading firmware 20201013

gordonmx 2021/04/04 02:31

I recently purchased nanoVNA v2 (S-A-A-S), HW version v2_2 from Zeenko. The information sheet included listed a github site for the latest firmware release ( ). Sorry to say I didn’t write down the version of the original F/W, but there was a new release on the website (20201013) which directed me to I download the new version, then load to the nanoVNA v2 using vna-qt.exe on my Windows 7 PC. I have 2 issues: 1) when I ouch the screen the menu pops up, but immediately disappears when I try to select a function and 2) the unit is a 50KHz to 3GHz, but only displays to 900MHz. I can only find uncompiled versions of older versions of the FW. Thanks for any assistance.

Vladimir Lebedev 2021/04/04 03:18

Hello Gordon!
After importing FW, the touch screen must always be calibrated. The device starts uncalibrated 100 MHz - 900 MHz.
Because the stylus is not working properly, please use the buttons.
Middle button - ENTER
right button - down
left button - up
ENTER -> opens the menu
Calibrate the touch screen
Now the menu works
Now you can continue calibrating the device
73. Vladimir, dl7pga

gordonmx 2021/04/04 21:48

Hello Vladimir,

Thank you for your quick reply and instructions. I'm new to the nanoVNA and didn't know the three buttons can be used to navigate the screen menus or that you needed to re-calibrate the screen after you load firmware.

My next issue is using the touch screen I can display the Main menu, then the CALIBRATE main menu, then click the Reset tab, then back to the Calibrate tab and continuing thru all the calibration steps to DONE and Save. At this time I end up in the CALIBRATE main menu and press the <-BACK tab to return to the Main menu, but instead the menu bar disappears. Touching the screen brings back the bar, but it is still in the CALIBRATE main menu. This repeats itself unless I use the 3 buttons to select the <-BACK tab. So there is a work around, but a little inconvenient. Is this a bug in version 20201013? During calibration it seem to only happen if I’ve press the DONE button first, but I’ve seen it happen with other menu bars.

My Cal->Version screen displays:

NanoVNA V2_2

Software copyright @edy555et al

Hardware designed by OwOComm

Licensed under GPL.

Version: git-20201013-32077fd

Build Time: Oct 13 2020 – 04:35:10

Compiler: gcc

Port Info: GD32F303

Board: NanoVNA V2_2

Has FPU: yes

Thank you again for your assistance.

Stay Well,

Gordon Margulieux

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