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 https://groups.io/g/NanoVNAV2.
Click here to join and see most recent posts.

NanoVNA Saver does not find com port


PH7R - Ronald 2022/04/13 13:29

I am trying to run NanoVNA Saver but somehow it does not find the com port. If I use VNA_qt it puts the device in USB Mode. device is V2 Plus4 FW 20220301 but also with 20211227 no difference. Any suggestion?

73, PH7R Ronald

Vladimir Lebedev 2022/04/13 22:39

Hello Ronald!
Have You driver for NanoVNA V2Plus4 installed?
https://nanorfe.com/downloads/NanoVNA-QT/CypressDriverInstaller_1.exe

NanoVNA QT works not without this driver.

73 de Vladimir, dl7pga

PH7R - Ronald 2022/04/14 00:05

Thks Vladimir,

The problem is not VNA QT. This program works and find the com port. Somehow Nano VNA Saver is not able to find / see the com port.

73, PH7R Ronald

Jim Lux 2022/04/14 06:56

On 4/14/22 12:05 AM, PH7R - Ronald wrote:
> Thks Vladimir,
>
> The problem is not VNA QT. This program works and find the com port.
> Somehow Nano VNA Saver is not able to find / see the com port.
>
> 73, PH7R Ronald
> _._,_._,_


since NanoVNA-Saver uses pyserial and python, you can independently
check whether all the right libraries/drivers are installed by running
the pyserial "list ports" tool.


at command line:

python -m serial.tools.list_ports




https://pyserial.readthedocs.io/en/latest/

PH7R - Ronald 2022/04/14 07:28

On Thu, Apr 14, 2022 at 03:56 PM, Jim Lux wrote:

>
> running the pyserial "list ports" tool.

Jim, sorry but not familair with Python.

73, PH7R Ronald

Jim Lux 2022/04/14 10:54

On 4/14/22 7:28 AM, PH7R - Ronald wrote:
> On Thu, Apr 14, 2022 at 03:56 PM, Jim Lux wrote:
>
> running the pyserial "list ports" tool.
>
> Jim, sorry but not familair with Python.


Ah - well, if you're running NanoVNA-Saver, you're running python, and
it uses the python pyserial library.

After installing NanoVNA-Saver, you should be able to just run python at
the command line, using the list_ports function as given.

PH7R - Ronald 2022/04/14 13:04

Thks Jim,

I have downloaded v.0.4.0 from github. It is a exe file (NanoVNASaver.x64). If I start the exe file NanoVNA Saver opens but I do not see any option of the cmd line.
Maybe it is mine lack of knowledge :-).

Brgds Ronald

Jim Lux 2022/04/14 13:40

On 4/14/22 1:04 PM, PH7R - Ronald wrote:
> Thks Jim,
>
> I have downloaded v.0.4.0 from github. It is a exe file
> (NanoVNASaver.x64). If I start the exe file NanoVNA Saver opens but I
> do not see any option of the cmd line.
> Maybe it is mine lack of knowledge :-).


Windows command line.  Open the "windows" thing and enter cmd.

PH7R - Ronald 2022/04/14 13:45

It gives "Python not found".

Jim Lux 2022/04/14 13:55

On 4/14/22 1:45 PM, PH7R - Ronald wrote:
> It gives "Python not found".
> _._,_._,_


INteresting - it must be some sort of compiled Python then.

I don't have any windows machines that don't have python on them, so I
can't experiment with duplicating your install.

PH7R - Ronald 2022/04/14 14:06

Thks for your input. I will investigate further.

Russ Fretenburg 2022/04/14 17:04

Hi guys,

I just got my new NanoVNA V2Plus4 today and see the same issue. NanoVNA-QT works fine but the NanoVNA Saver app cannot connect to the NanoVNA serial port. I am running Windows 10 and I followed Jim's suggestion to install Python and pyserial. I am able to see the serial port listed by Python using the serial.tools.list_ports command, but the NanoVNA Saver app still will not connect to it.

Any other suggestions? Does anyone else have this working on Windows 10?

Thanks,
Russ

tonpijpers 2022/04/17 23:34

Hi.
I had the same problem and solved it with the following procedure:
Download the zip file, attached and unzip it. Open the exe file Rapx. Find the cypress drivers (See picture below)
Checkmarks the boxes and press delete.
Poweroff the NanoVNA and detached the usb cable from the computer.
Poweron the nanoVNA and attached the usb cable

PH7R - Ronald 2022/04/18 01:32

Thks, worked! Super

73, PH7R Ronald

To reply to this topic, join https://groups.io/g/NanoVNAV2

View this thread on groups.io