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Virtual RS232 Port Driver
RS232 Communication Software

Virtual RS232 Port Driver creates virtual serial ports connected via null modem emulator. These virtual COM ports work in pairs: data sent by one application will be instantaneously received at another end of the pair by another application.

The ports created by this virtual RS232 communication software appear to your operating system or application as standard serial ports. In fact a virtual serial ports not only do not clutter your desk, but also work faster than real ones. The virtual RS232 driver based on virtual null-modem can be included in your own software providing a way to create and configure virtual com ports directly from your application (OEM license).

Virtual Serial Port Driver advantages

  • Any number of virtual COM ports

    The number of virtual RS232 ports you can create with the help of RS232 communication software is almost unlimited; while your real serial ports remain free. Virtual ports can be given any name, existent serial ports’ names included. The system sees and recognizes virtual ports as they are displayed in ‘ports’ group in Device Manager. You can set up a port so only particular applications will have access to it.
  • Real ports settings emulation

    The system will not see any difference between virtual and real ports. Virtual com ports are as good as the real ones, they emulate all functionality, including Baud rate, data bits, parity bits, stop bits, etc. Virtual RS232 port driver emulates a serial line break and is fully compatible with API COM. VPSD uses advanced Windows kernel driver technology that allows WDM, WMI, Power Management, PnP, Windows messages, etc. support.
  • All signal lines support

    Virtual RS232 null modem cable allows emulating and supporting all standard hardware signal lines (DTR/DSR, RTS/CTS, RING, ERROR, DCD, etc.). Just like a real one, virtual null modem cable connects DTR of the local port to DSR and DCD of the remote port, RTS of the local port to CTS of the remote port. You are free to choose loopback pinout or customize it to suit your hardware configuration best.

Virtual Serial Port Driver Licenses

OEM License permits you to embed Virtual Serial Port Driver technology into your own software or hardware products. OEM license grants you the right for unlimited redistribution of Virtual Serial Port Driver as an integral part of your software. OEM license is a royalty-free one-time purchase.

OEM License

Virtual Serial Port Driver Inside Your App

Purchasing the OEM license you get:

  • OEM documentation on how to work with our driver directly
  • Example for creating a class which demonstrates the possibility to create the ports like in VSPD (visible and invisible ports)
  • vspdctl.DLL - wrapper for a driver for manipulations with virtual serial ports on a higher level
  • Supported IDEs

OEM For Developers
Sign up for the API evaluation program and integrate it into your product.

Source Code License

Ordering Source Code license for Virtual Serial Port Driver you receive all extensively commented programming source code of the driver (GUI sources are not included). In addition, we provide technical and information support by email, IMs and phone, and high-end consulting services. Our leading developers will help you implement Source codes and understand the advanced part of the product.

Site Licensing

Unlimited Site License grants you the right to install and utilize Virtual Serial Port Driver application with GUI on unlimited number of computers by all workers of your company worldwide. It is the ideal solution if your company has representation offices in the different parts of the world.

If you know the certain number of computers to be equipped with VSPD you may consider obtaining Limited Site License. The advantage of Site Licensing comparing to multiple Single licenses is one license key for all company computers.

Full features list

An unlimited number of virtual RS232 ports pair can be created.
Virtual RS232 created are exactly the same as the real ones – applications communicate with them as real ports.
Virtual serial ports can be managed straight from your own program using the DLL that comes with VSPD SDK (OEM License)
Data transfer between virtual ports uses the fastest speed compared to real RS232 null modem cable transfer speed. Although, it depends on the processor speed.
Real serial ports are not occupied – no real ports in machine no problem.
Virtual ports can be created only for the current user session. RDP users can create ports with the same name (e.g. COM1) in each user session.
Enable automatic ports’ list update, to keep tabs on the pairs created in other user sessions
Immediate ports creation makes working with them faster even before PnP manager detects the recently added ports
Baudrate emulation is strict by this RS232 communication software
Created virtual null-modem can be deleted even if they are used by other applications
What customers say
  • We are using VSPD for testing out Geographic Information System software connectivity with a virtual GPS (software simulation). The GPS emulator is simulating the output we normally receive from a GPS navigator.
    Bjørn Krangnes

Overall rating 4.9
based on 97 reviews

Let's get started

Virtual Serial Port Driver for Windows
Demo version limitations
• 14-day fully-functional trial
System Requirements
Windows (32-bit and 64-bit): XP/2003/2008/ Vista/7/8/10, Windows Server 2012, Windows Server 2016
Latest Update
Version 9.0.567 (6th Aug, 2017) Release notes