1. Vspe Virtual Serial Port Emulator

The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another. A virtual serial port is an emulation of the standard serial port. This port is created by software which enable extra serial ports in an operating system without additional hardware installation (such as expansion cards, etc.). It is possible to create a large number of virtual serial ports in a PC. Create virtual serial port, connect with virtual null-modem through the network or locally, share real comm ports over the LAN or Internet.

• Serial port splitting

  Virtual Serial Port Driver PRO allows splitting physical serial ports (e.g. COM 1) into several virtual communication ports (COM2, COM3, COM4, etc.) which appear in the system as exact copies of a hardware serial interface. Also, the software offers the sharing of hardware serial ports among multiple applications. Several serial apps will be able to access the same COM port and a device plugged into it.

• Joining COM ports

  The software solution will help you link several real COM ports to one virtual serial port. Connected to this virtual COM port, a serial application will receive data from all joined real COM ports simultaneously. Simply put, with this advanced feature, you’ll be able to redirect data from several devices to one application.

• Creating bundle connections

  This unique option offered by the software PRO version lets you create and manage complex bundles of serial ports. That means serial data can be transmitted in and out by an unlimited number of physical and virtual COM interfaces. Received by a COM port of the ‘IN’ side, serial data will be redirected to every COM port at the ‘OUT’ side of a bundle and vice versa.

  
  

  Above that, setting Main Port for each side of a bundle (In/Out), facilitates the process of managing hardware control lines.

• Switching ports automatically

  In case your application is designed to work with a limited number of ports, you can use Switcher, a special feature of Virtual Serial Port Driver PRO. With this option, you can join several physical ports into one virtual (optionally, you can give the same name to all of the ports), and create a switcher to this virtual COM port in the required app. Seriale turcesti subtitrate in romana inainte de sfarsit.

  
  

  Whenever your program will require a serial port connection, the switcher will detect a non-occupied COM port in the list of joined ports and offer it to the app. This way, your program will automatically talk to any free serial port as though it were always the same port.

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• Merging COM ports

  The new advanced feature of Virtual Serial Port Driver PRO lets you add any number of physical and virtual COM ports to a single serial port bundle not divided into ‘IN’ and ‘OUT’ sides. Everything sent to one port will be replicated to all the other real and virtual RS232 ports of the bundle. Thanks to this feature, every device/application gets the ability to exchange data with multiple devices/applications simultaneously.

Compare STANDARD and PRO versions

#	Feature	Standard	Pro
1	Creating an unlimited number of virtual serial port pairs
2	Full emulation of real COM port settings and hardware control lines
3	Splitting one COM port (physical or virtual) into several virtual ones
4	Merging an unlimited number of physical or virtual serial ports into one virtual COM port
5	Creating complex port bundles
6	Ability to delete ports already opened by other applications
7	High speed of data transfer from/to a virtual serial port
8	Ability to forward serial traffic from one real port to another real or virtual RS232 port
9	Strict baudrate emulation
10	Availability of different virtual null-modem schemes: standard/ loopback/ custom
11	Ability to assign a virtual serial port with a custom name, including names already used by real ports
12	Virtual RS232 port software and all of its internal drivers are digitally signed
13	Support for Windows kernel driver technology (WDM, WMI, Power Management, PnP, etc.)
14	Virtual RS232 ports support for hyper-threading and VMware
15	Possibility to set read and write rights for every RS232 port
16	Saving data on usage of ports by applications in ‘Activity log’
17	Ability to customize the parameters of connections to a real serial port (baudrate, parity, flow-control, databits, and stopbits)
18	No need to reboot a computer after software installation, creation and reconfiguration of virtual serial ports
19	Automatic re-creation of ports on system reboot (prior to user logon)
20	Ability to change names of virtual COM ports created by VSPD and displayed in the Device Manager
21	Full support of HandFlow control (Hardware and Xon/Xoff)
22	Sharing one real COM port among multiple applications at a time
23	Ability to merge several serial ports into a single bundle

Vspe Virtual Serial Port Emulator

Now it is especially hard to develop an application which works with a serial device, considering that not every modern PC has a serial port to connect that hardware. The least convoluted way is to create a virtual serial connection, and Virtual Serial Port Driver does exactly that. To debug serial communication programs one would need to have at least two physical ports. Therefore, to debug an application, you would require two computers or an additional PCI expansion card with a serial port. As it wasn’t an option for me, I used Virtual Serial Port Driver to create a couple of virtual COM ports, which allowed me to perform full testing of the data exchange program. Emulating virtual RS232 connection with Virtual Serial Port Driver allowed me to exchange data between 2 applications without using the rather complicated software technology of interprocess communication and resource sharing. PrevNext

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  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.

Definition of: virtual serial port
The simulation of a serial port in software in order to allow USB, Ethernet or some other input/output port to take its place. Virtual serial ports are necessary to enable an application that was written for the serial port to run on a computer that does not have that interface. See serial port.
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