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Hello to the group,

I have tried this before but ran into such a brick wall that I had to walk away from it. That said some time has passed and I am trying this again. I have a semi newer H4 Version 0.5.0 and am having a problem getting windows to recognize the VNA.

With that said, I am ready to give it a try again. Based on my current position, what is the next step when you plug it in and get the message below?

Thanks,

Read Absolute Beginner's Guide to NanoVNA
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf

73
Martin 9A2JK

Hello Andy,

I just installed the drivers from the ST site on a Win10 computer using the "Absolute Beginner's Guide to NanoVNA" yesterday in hopes of connecting to a NanoVNA-H4. The guide is very helpful but I did run into one issue with installing the the DfuSe_Demo driver.
-- The first driver (Virtual COM Port) installation & validation went fine using the Win8 driver - as suggested by the guide.
-- The second driver (DfuSe_Demo) installation went fine using the Win10 driver. However, when I put the H4 into DFU mode the computer would not recognize it and told me that I had the wrong driver...

Long story short -- I finally decided to try the Win8 driver for DfuSe_Demo and everything worked fine.

The NanoVNA-H4 successfully upgraded to V 1.0.69 and so far works with nanoVNA-saver and nanoVNA-app.

Perhaps this will work on your Win10 machine.

Terry-KD8RGJ

Everything helps..
Thanks!

--
*Andy Sayler, Head Monkey | Keyed Up/Oil Can Garage.*
Down The Street | Lynden, WA 98264 | mobile (360) 319-7417

If I understand correctly, The Windows 8 Driver is available on the Windows 10 System to access the virtual com port. The DeFuse_Demo uses a Windows 10 Driver. Where do you get the Windows 8 driver for it and how do you get the DfuSe+Demo to use it?

John KE0ZUW

John,

I downloaded the drivers directly from the ST website. The zip files contain versions for various vintages of Windows. The guide referred to below was very helpful in downloading and installing the drivers and software with the only caveat that, at least on my machine, I needed the Win8 DfuSe Demo driver because the Win10 one would not work - even though it is a Win10 machine.

The driver install instructions start on page 28of the pdf file.

The forum's Wiki has the link and lots of other useful information.?


On Sat., 23 Oct. 2021 at 9:04 p.m., John Nicholas<KE0ZUW@...> wrote: If I understand correctly, The Windows 8 Driver is available on the Windows 10 System to access the virtual com port.? The DeFuse_Demo uses a Windows 10 Driver.? Where do you get the Windows 8 driver for it and how do you get the DfuSe+Demo to use it?

John KE0ZUW

OK! I got my H-4 updated. to V1.026 from DiSLord.

Not according to the Wiki. So here goes.

1. My H4 was stuck in DFU mode for several months after my first attempt.
2. I could not find the Device Manager on my PC.
3. I started looking a DFU_Util download information not related to Nano-VNA and got a reference to a Microsoft up date on Design Tools.

SO

I downloaded the MS update

AND

The Device Manager showed up and showed my Nano as unreadable.
Back and forth, reboot the PC, connect and disconnect the Nano, find a different cable. Bought a new cable.
Reading the Wiki and the Absolute Beginners Guide as noted.

Finally I tried starting with the Nano (stuck in DFU mode) unconnected and turned off. I connected the device. Brought up the Device Manager and turned the device on. There it is. Not recognized but it is finally there.

So I turned the device off. Closed the device Manager. Then I opened the DFU_Demo. Turned the Nano on and opened the Device Manager. And the Nano was recognized. Closed the Device Manager and there is was in the proper place in the DFU Demo.

Upload the FW on the Nano to a File.
Update the device from a file via the Google Drive listed in the Files section. RAR v1.0.26.rar. Expanded it contains 4 files. After reading the names a few times; there are 2 for the H model and 2 for the H4. So which one.

Names are the same except ending in LSE.dfu and LSI.dfu. Tried the LSE and everything went fine successful upgrade. But the nano would not come on as expected. So start over and tried the LSI.dfu file. Same thing with success noted in the dfu_demo app. And it operated as expected when I turned it on.

Conclusions:

1 The device can be in DFU mode. The directions say plug in and turn on. So Start with it off and turn it on when plugged in.

2. If you can’t see the device manager, fix that.

3. The wiki, and the guide need to note which files to use after the archive download is expanded. Or at least a note to try one then the other.

So a huge thank you to all that have provided constructive input on the ins and outs of this device. And the pointers to my last request, responses on the thread and especially to the several members that replied with info offlist.

73 de KE0ZUW John

The LSI and LSE refer to internal and external time of day clocks on the processor.?
If you have a 32.768KHz xtal, you can solder it between pins p14,p15 on the terminals along the bottom edge of the H4 PCB. Then, use the latest firmware and it will autosense if you're using a xtal and keep a fairly accurate time of day clock.?
Good to hear your toy is working.?


On Tue., 26 Oct. 2021 at 6:36 p.m., John Nicholas<KE0ZUW@...> wrote: OK!? I got my H-4 updated. to V1.026 from DiSLord.

Not according to the Wiki.? So here goes.?

1.? My H4 was stuck in DFU mode for several months after my first attempt.
2.? I could not find the Device Manager on my PC.?
3.? I started looking a DFU_Util download information not related to Nano-VNA and got a reference to a Microsoft up date on Design Tools.

SO

I downloaded the MS update

AND

The Device Manager showed up and showed my Nano as unreadable.
Back and forth, reboot the PC,? connect and disconnect the Nano, find a different cable. Bought a new cable.?
Reading the Wiki and the Absolute Beginners Guide as noted.

Finally I tried starting with the Nano (stuck in DFU mode) unconnected and turned off.? I connected the device. Brought up the Device Manager and turned the device on.? There it is. Not recognized but it is finally there.

So I turned the device off. Closed the device Manager.? Then I opened the DFU_Demo.? Turned the Nano on and opened the Device Manager.? And the Nano was recognized.? Closed the Device Manager and there is was in the proper place in the DFU Demo.

Upload the FW on the Nano to a File.
Update the device from a file via the Google Drive listed in the Files section.? RAR v1.0.26.rar.? Expanded it contains 4 files.? After reading the names a few times;? there are 2 for the H model and 2 for the H4.? So which one.

Names are the same except ending in LSE.dfu and LSI.dfu.? ? Tried the LSE and everything went fine successful upgrade.? But the nano would not come on as expected.? So start over and tried the LSI.dfu file.? Same thing with success noted in the dfu_demo app.? And it operated as expected when I turned it on.

Conclusions:

1? The device can be in DFU mode.? The directions say plug in and turn on.? So? Start with it off and turn it on when plugged in.

2.? If you can’t see the device manager,? fix that.

3.? The wiki, and the guide need to note which files to use after the archive download is expanded.? Or at least a note to try one then the other.

So a huge thank you to all that have provided constructive input on the ins and outs of this device.? And the pointers to my last request,? responses on the thread and especially to the several members that replied with info offlist.

73? de KE0ZUW? John

OMG OMG OMG...

thank you so much i unbricked my NanoVNA-H4 using the section "FIRMWARE UPGRADE USING NanoVNA-App for Windows
by OneOfEleven" in the absolute begirners guide.

thank you so much again this totally made my day!!