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Virtual Serial Port Emulator 'LINK' Crack

VSPE is intended to help software engineers and developers to create/debug/test applications that use serial ports. It is able to create various virtual devices to transmit/receive data. Unlike regular serial ports, virtual devices have special capabilities: for example, the same device can be opened more than once by different applications, that can be useful in many cases. With VSPE you are able to share physical serial port data for several applications, expose serial port to local network (via TCP protocol), create virtual serial port device pairs and so on.

Virtual Serial Port Emulator Crack


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A software-based virtual serial port presents one or more virtual serial port identifiers on a PC which other applications can see and interact with as if they were real hardware ports, but the data sent and received to these virtual devices is handled by software that manipulates the transmitted and received data to grant greater functionality.

Operating systems usually do not provide virtual serial port capability. Third-party applications can add this ability, such as the open-source com0com, freeware HW VSP3, or the commercial Virtual Serial Port Driver.

Some virtual serial ports emulate all hardware serial port functionality, including all signal pin states, and permit a large number of virtual ports in any desired configuration. Others provide a limited set of capabilities and do not fully emulate the hardware.[1]

This technique can be used either to extend the capabilities of software that cannot be updated to use newer communication technologies, such as by transmitting serial data over modern networks, or to achieve data flows that are not normally possible due to software limitations, such as splitting serial port output.

A serial port typically can only be monitored or transmitted to by one device at a time under the constraints of most operating systems, but a virtual serial port program can create two virtual ports, allowing two separate applications to monitor the same data. For instance, a GPS device which outputs location data to a PCs serial port may be of interest to multiple applications at once.

Another option is to communicate with another serial device via internet or LAN as if they were locally connected, using serial over LAN. This allows software intended to interface with a device over a local physical serial port to instead communicate at long distance.[2]

The drivers for a software-implemented modem create a virtual serial port for communication with the host operating system, since the modem is implemented entirely in the device driver and therefore there is no point where the serial data would be sent to the physical card.

VSPE is intended to help software engineers and developers to create/debug/test applications that use serial ports. It is able to create various virtual devices to transmit/receive data. Unlike regular serial ports, virtual devices have special capabilities: the same device can be opened more than once. Using VSPE you can share physical serial port data between several programs, create virtual pipes and so on. Version 0.865 includes unspecified updates.

HW VSP is a software driver that adds a virtual serial port (e.g. COM5) to the operating system and redirects the data from this port via a TCP/IP network to another hardware interface, which is specified by its IP address and port number. HW VSP3 support even NT Services and 64 bit Windows 8 .

HW Virtual Serial Driver is intended primarily for devices produced by HW group, although it can be used for free as a universal driver that creates a virtual remote serial port, which redirects data to a predefined TCP/IP address and port.

In special applications (e.g. involving GPRS devices), the PC with the HW VSP driver can be set to operate in TCP Server mode, enabling the remote device to initialize the connection by sending any data to the remote port. Upon receiving RS-232 data, the converter establishes a connection with the PC and passes the data to the virtual COM port. Therefore, the scenario very closely resembles behavior of a real serial port.

When using HW VSP together with recommended devices produced by HW group, it is possible to change connection speed, parity, and other communication parameters (as well as to control any digital outputs and inputs) remotely on the fly via the RFC-2217 protocol, thus achieving a true remote serial port behavior.

Ability to run as a service has been the main reason for developing the new version. Running HW VSP as a standalone application requires starting it under a logged-in user and therefore prevents autonomous operation on Windows servers. (At this time, HW VSP fully supports Windows 2000 Server and Windows 2003 Server. Support for Windows 2008 Server is being tested.) In this mode, HW VSP consists of a client-side part (setup GUI) and a server-side part (the service itself). Parameters of a VSP running on a remote server can be easily changed from a local PC. However, in order to improve stability, only one user may access the service and change virtual port parameters at a time. Furthermore, since service administration requires administrator privileges, securing a VSP against misuse is as simple as not installing the client-side part.

In the previous version, HW VSP was fully transparent to the client software and did not restrict the communication flow in any way. Hence, the client SW had to send the data to the serial port using a defined communication speed, or use flow control (handshake). Otherwise, data were sent to the Ethernet / Internet with the maximum speed possible, often in the 10 Mbps range. When the buffers in VSP filled up, data started to be thrown away. Now, it is possible to enable the Strict Baudrate Emulation option in the Settings tab to ensure that VSP communicates with the client SW using the speed that is currently selected for the port.

This function allows connecting VSP to the port previously created and opened by the client application. This function is useful for servers, where it eliminates the need to close the corresponding virtual port before restarting server or the VSP service.

In the image we see a serial cross cable, sometimes also known as null-modem cable. It crosses the transmit and receive lines and is used to interconnect two serial ports, either on the same computer or between two different computers. Of course, this cable can only be used directly if there are serial com ports available.

So how do we connect serial devices to a PC or how do we connect two PC applications that require serial port communication if there are no serial ports available on our system? Fortunately there are several options we can choose from.

If both, or one of the computers we want to connect lack any serial com port, we can use USB-to-Serial adapters. During the installation of the drivers for such an adapter the setup software will install one or more serial ports on your computer. You can check this with Windows Device Manager. But still you need the cross cable for the connection even if you use a USB-to-Serial adapter on both computers, but now you connect the cable between both adapters.

Another option is using Bluetooth. For less than $20 you can purchase two Bluetooth USB sticks and configure serial ports on them. After pairing you have a wireless serial connection between two computers. Make sure that serial ports are supported when you buy the Bluetooth adapters!

For two applications to be able to talk to each other over a serial connection on one and the same computer, this is by far the most convenient solution. A commercial product for example comes from Eltima, , and another one from KernelPro -virtual-com-port.html. There are lots of others of course. A great open source virtual comport product I like very much is com0com. You can create any number of serial port pairs on your system. Each pair you may compare to a cross cable if you like. For example, app A transmits data via COM10, app B receives this data via COM11. I use com0com a lot in the configuration as shown in the screenshot while testing NemaStudio against different software like SeaClear, Y-Tronic, Fugawi, CoastalExplorer and others. Just recently I discovered another virtual serial port emulator from Eterlogic, VSPE. I have not been able to test it out yet, but the specs look very promising, and from the specs it should be able to do a lot more but just virtual serial port emulation.


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