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 ( https://github.com/nanovna/NanoVNA-V2-firmware/releases ). 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 https://nanorfe.com/nanovna-versions.html. 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.

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
go to CONFIG -> ENTER
then TOUCH CAL
Calibrate the touch screen
then CONFIG -> SAVE
Now the menu works
Now you can continue calibrating the device
73. Vladimir, dl7pga

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.

https://github.com/ttrftech/NanoVNA

https://github.com/nanovna/NanoVNA-V2-firmware

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