Employing virtual devices to simulate the behavior of their physical counterparts has long been a widely accepted method of developing, testing and debugging software.
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Serial port emulation is used by developers of complex serial communication systems. Programmers can use a variety of software tools that provide operating systems (primarily Windows OS) with virtual serial ports. These software solutions allow testing and monitoring of serial port communications between RS232 and RS484 interfaces.
Even applications designed to work with hardware COM ports that are resident on client computers can be tested without connecting to physical serial ports, Dedicated software tools enable the creation of pairs of virtual COM ports that communicate by way of a virtual null-modem cable. You can also develop a serial port emulator yourself to simplify the testing and monitoring of data traffic between your program and a physical COM port.
Serial port emulation: main principles
As an example, consider that a programmer developing and debugging an application for serial communication will usually need at least two physical serial ports. Currently, most computers provide at most one serial port, forcing a developer to either use two machines or obtain a PCI card containing a COM port. By using the serial port emulator the programmer can now create multiple virtual COM ports on one computer, allowing any serial communication program to be developed on any computer that can run the emulator.
Virtual COM Port Driver by Eltima Software is a powerful serial port emulator that offers advanced functionality built on a simple, user-friendly interface. All recent versions of the Windows operating system are supported by VSPD. The tool is even more stable when run on Windows 10 as it is digitally signed with WHQL. These are just a few of the many reasons that make Virtual Serial Port Driver one of the best and effective serial port emulate tools available.
Serial port simulation with different programming languages
To simplify working with files and devices, standard options such as CreatePair, DeletPair, SetStrictBaudrate and others are fully supported by VSPD. Below are some examples of how you can take advantage of Virtual Serial Port Driver with some popular programming languages.
C/C++
Load the DLL file dynamically and then choose and call your desired functions to effectively use virtual port emulator. Here’s how it looks in Visual C++ :
Visual Basic
With Visual Basic, you need to paste these lines into your source file to access the functionality of VSPD:
With the VSPDCTL.DLL in your application’s directory, the functions can be called directly.
Delphi
Here are the function declarations for Delphi:
ArmAccess can be loaded statically or dynamically. For dynamic loading, use this sample code:
COM ports have been introduced a long time ago and have been an integral part of computers. These days however they become almost obsolete as more and more machines use USB ports or no ports at all. This doesn't eliminate the need for serial connections though, especially if we are talking about industrial equipment, lab devices, etc. Developers creating software to work with industrial devices need to test and debug applications before releasing them. That's where virtual serial port emulation comes into spotlight. If you are looking for a software to create a virtual COM port on Windows 10 or a virtual COM port on Windows 7 read about the virtual serial port emulator software that we consider to be the top solutions currently offered:
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Virtual Serial Ports Emulator
1. Virtual Serial Port Driver developed by Eltima Software allows users to create virtual serial ports that can be connected in pairs via virtual null modem (com0com) cable. Applications communicating with created virtual ports treat those ports the same way they would communicate with real ports. This software solution works on 32- and 64-bit Windows OS and supports operating systems up to the latest Windows 10. Virtual Serial Port Driver is officially signed by Microsoft.
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The advantages of Virtual Serial Port by Eltima:
In case you are willing to split a real or virtual COM port data between several applications, check out our tutorial about serial port sharing with VSPD PRO version.
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2. Null-modem emulator (com0com) is an open source kernel-mode virtual serial port emulator for Windows, distributed under GPL license. One can create an unlimited number of virtual serial port pairs and connect one serial application to another with any created pair. This app can provide serial interface for device emulators and serial port redirectors.
See comparison chart of Virtual Serial Port Driver and Null-Modem Emulator
3. Free Virtual Serial Ports by HDD Software is a Windows user-mode software that offers creation of virtual COM ports and emulation of physical serial ports. This app operates in user-mode exclusively and acts as a hardware COM port with full functionality, baud-rate emulation, configuration of data bits, parity, stop bits, XON/XOFF flow control, etc.
This serial port emulation software works on Windows desktop and server versions up to Windows 8/8.1 32- and 64-bit.
4. Virtual Serial Ports Emulator developed by Eterlogic is the next VSPE solution on our list. It is developed for software developers to create/debug/test applications that use serial ports. Virtualization of ports offers great possibilities: same device can be opened by different apps, physical serial port data can be shared among several applications, a serial port can be shared to local network (via TCP), one can create virtual serial port pairs, etc. This program supports Windows 2000, XP, Vista (32/64), Windows 7. Licenses for 32-bit platforms are offered for free, while 64-bit solution is paid.
Download xforce keygen autocad 2013 64-bit. 5. Virtual Serial Port Kit is developed by FabulaTech and offers virtual serial ports creation with the possibility to connect them via virtual null-modem cables. All information written to one virtual port is immediately available on the other one of the pair. Virtual serial ports function the exact same way as hardware serial ports. This app also runs as system service meaning all virtual ports are available prior to user logon.
Prices and more details are available on developers' websites. Some solutions are free, but will require you to expose your source code when developing an app with them, also not offering support for the latest Windows OS. Some solutions require a payment but in return you receive an up-to-date software with regular updates and dedicated support service. Hopefully this brief overview will help you get the best virtual COM port solution for your project.
COM Port Data Emulator
This software tool allows the user to emulate the data stream generated by a serial interface or device. You can use the application to create data packets and send them to network-connected serial ports. The data packets can be randomly generated or read from a file to enable complete control of their contents.
The program offers flexible configuration options and can serve as a server or client on a TCP/IP network. Full duplex mode and flow control are supported on COM and RS232 ports. Log files of sent data can be saved for future analysis and data is visually displayed as it is sent and received. Developers and network professionals can benefit from the features of this serial communication application.
Virtual Serial Port Driver
Requires: Available on Windows , 5.5MB size
Version 9.0.575 (23rd May, 2019) Release notes Category: CommunicationApplication
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