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-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Larry Rothman
Sent: ????? 16 ?????? 2021 20:47
To: [email protected]
Subject: Re: [nanovna-users] help with driver issue for a newbie

Have you looked over in either of the nanovna-V2 forums?
I just found this thread there:
/g/NanoVNA-V2/topic/win_10_issue/77411380?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,80,77411380
On Monday, August 16, 2021, 12:40:41 p.m. EDT, Ray <boxman@...> wrote:

Hi All,

I am having a frustrating driver issue. It is all the more frustrating because at some point I succeeded in controlling my nanoVNA from various software packages from my laptop, and was all set to study the various options, choose the one most suitable for me, and get to work! But currently, the computer and the nanoVNA do not appear to talk with each other.

I have no idea of which nanoVNA v. 2 variant I have, but please see the attached photo. Under version, it states that the hardware was designed by OwoComm. I purchase it from Ali Express for $62.? I am trying to connect with a relatively recent Lenovo laptop running Windows 10 pro. It just did an update to version 20H2 (today) but I had the same problem before and after the update. I have the following symptoms:

1.? ? ? When I plug in the USB cable, the nanoVNA screen remains active.

2.? ? ? When I plug in or disconnect the USB cable, I get a characteristic dong from the laptop, but I do not observe any difference in the device manager display.

3.? ? ? What appears in the device manager display under ports is "STMicroelectronics Virtual COM port (COM4)" together with the yellow triangular warning icon, whether the nanoVNA is connected regularly, or in DFU mode, or disconnected (see attached screen shot).

4.? ? ? If I right click on this and look at properties, I get

a.? ? ? (general), "The device cannot start (Code 10). The specified request is not a valid operation for the target device

b.? ? ? (driver): driver version 1.4.0.0, driver date 2-Aug-13

c.? ? ? (Events): information: Device ROOT\PORTS\0000 requires further installation

I followed the procedure in Absolute Beginner's Guide to NanoVNA by Martin Svaco, 9A2JK, and in particular tried all of the methods suggested in the TROUBLESHOOTING THE DRIVER INSTALLATION section. Before today's update, I also used CCleaner to clean-up the registry. But all to no avail. I tried updating, uninstalling, reinstalling, the driver etc., but nothing alleviated the above described symptoms.

I would value any and all advice!

73,
Ray 4X1RB



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