Attach USB device to Hyper-V guest machine

@Leon Laude , seems you are avoiding the real question...

The answer is a big NO. Hyper-V CANNOT have pass-trough USB device other then storage. I.e. No ZigBee dongle, No Intel Neural Net USB dongles, no MFA/2FA dongles, not crypto tokens. I'm very surprised as VMWare ESXi had it up front in the beginning in early versions and it works great, and no "special disabling" of the device is required LOL.

very disappointed in Microsoft yet again.

This is M$ Shame #56510

While even open-source hypervisor supports real USB Passthrough,

M$, after decades, is still limited to just attach USB Drives if they are willing follow a nightmare process with 20 steps.

Isn't Microsoft even able to peek e.g. virtual box source code so get smart and understand how one could write SW to allow real USB Passthrough?

What is the solution?

The only solution I know to work reliably in this particular use case is either using a different hypervisor (VMware ESXi or Linux KVM) or USB-over-Ethernet software, like this one https://www.eltima.com/de/products/usb-over-ethernet/.

Another alternative is to purchase a dedicated PCIe USB controller (they are cheap) and pass it to your virtual machine entirely with the USB key plugged into it. That works most of the time.

You may also ask your software vendor for options other than a USB key. Usually, they offer some network- or online-based alternatives.

My setup is:

Hyper V Server (i.e. the bare metal hypervisor only, but this guide should also work on Windows Servers)

Ubuntu VM (named Leya) which runs on the HyperV Server with OpenHab and a ZWave USB dongle.

1. Create the VmComport:

       Set-VMComPort -VMName 'Leya' -Number 1 -Path \\.\pipe\aeontech 
   

   Note: you can whatever name you want for your pipe.
2. Install COMpipe
   1. Install Visual C++ Redistributable since Hyper V does not come with it preinstalled. You can download it from here: https://aka.ms/vs/17/release/vc_redist.x64.exe
   2. Download COMpipe from here: https://github.com/tdhoward/COMpipe/tree/master/x64/Release
   3. Find the USB COM port by running:

                              Get-PnpDevice -PresentOnly | Where-Object { $_.InstanceId -match '^USB' } | Select-Object Name,Description,InstanceId
      

      You should have a line like: USB Serial Device (COM3) USB Serial Device USB\VID_0658&PID_0200\5&1E7D8DB7&0&5
   4. Run COMpipe:

              .\COMpipe.exe -c \\.\COM3 -p \\.\pipe\aeontech
      

   5. On the VM, the COM port will be available as /dev/ttyS0
3. As a final step, start COMpipe as a windows service. I used this service manager: https://nssm.cc/builds. The alternative is to start COMpipe manually but keep in mind this has to be done on every VM restart.