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

Note: this page is a mirror of
Click here to join and see most recent posts.


vittel 2021/12/31 01:30

Hello dear people,

I have a problem with my Nano VNA S-A-A V2.2
CPU is installed => GD32F303 CCT6
After a firmware update with DfuSE:
Nothing works with my Nano VNA S-A-A V2.2!
The screen of the Nano VNA is completely white after switching on.
I can no longer update via DfuSE, the DFu device (Nano VNA) is no longer found (USB device).
The short-circuit method VDD with BOOTO does not work !!!
However, I have access to the Nano VNA S-A-A via the ST Link V2, via this connection I can address and flash the VNA:

Address: 0x08000000
Size: 0x20000
Data width: 8 bits
Firmware: nanovna-v2-20201013-v2_2

After the firmware update (nanovna-v2-201013-v2_2) still a white picture, nothing else.
I use this firmware for flashing => nanovna-v2-20201013-v2_2.bin
See also

I shot the bootloader while flashing the firmware to address 0x08000000.

Is there a possibility that you email me the bootloader (thanks)
If the address for the bootloader is 0x08000000 => setting via ST Link / v2 => is that correct?

And the firmware then comes to address 0x08004000 is that correct?

Request for Info!

Thank you and greetings

Vladimir Lebedev 2021/12/31 04:21

Please reed manual for you V2 device (SAA-2) on
You use a false program. DFuSeDemo is for NanoVNA-H and NanoVNA-H4 only!!!
You need NanoVNA-QT from developer site
Have You 2.8 or 4 inch display?

Vladimir Lebedev 2021/12/31 04:23

You bootloader is ok. You can not destroy bootloader with DFuSeDemo or with NanoVNA-QT


vittel 2021/12/31 04:33

My bootloader is OK. How should I know that.
I flash the firmware as indicated with ST Link V2.
Nevertheless I have the errors as described, read my test => first mail!
What should I do?
The solution of the problem ?
Ask for info, thank you and greetings

Vladimir Lebedev 2021/12/31 05:57

Why use You ST-Link? FW update for V2 (SAA-2) devices is possible with programs NanoVNA-QT or NanoVNA-APP.
Please reed this. :

If You can not reed , please register in Forum of nanovna-beta-test


Vladimir Lebedev 2021/12/31 07:39

Haben Sie meine ditect email bekommen oder liegen die Briefe im Spamordner in Eurem Mailbox?

vittel 2022/01/01 02:34

@ Vladimir,
Happy New Year and the "nano-group" !

Thank you, too, for taking care, the instructions for "DiSlord" are great!
That's exactly what I was looking for.
I'll test it out today and send you feedback.

Greetings from Germany

vittel 2022/01/01 04:14

@ Vladimir @ DiSlord, @ everyone who helped

Here is my feedback:

I just flashed my NanoVNA, works perfectly according to the instructions.
Thanks again to everyone who helped, thanks to the forum!

Happy New Year and greetings

To reply to this topic, join

View this thread on