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HW VSP

Free - HW group
HW VSP adds a virtual serial port (COM5) to the system and redirects all
communication over TCP/IP to remote IP address. HW VSP is free in
unlimited version, it supports Windows 2000 and XP. HW VSP works with any
TCP/IP device, it can work as a TCP server as well as a TCP Client.
HW VSP supports remote RS232 port control (speed, parity, stop bits,
etc..) over the RFC2217 (NVT).
port, rs232, serial, device, data, testing, system, stress test, com port, view, packet, analysis
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COM Port Data Emulator

Free - AGG Software
As a software or hardware engineer, you may often face situations when you need information about the ability of communication ports on a typical end-user system to handle large flows of data. If looking for a reliable and affordable COM port testing and analysis tool, look no further than COM Port Data Emulator! It was created for emulating a COM or Ethernet device, generating a data stream and sending it to a specific serial (COM) port.
monitoring, analyzer, activity, viewer, connection, modem, traffic, transfer, reader, test, capture, sniffer
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NCD Device Development Lib

Free - National Control Devices
NCD Devices Development Lib supply powerful ActiveX for all NCD devices.
NCD relay controllers allow computer controlled switching from the RS232 serial port of a microcontroller or computer.
NCD video switchers allow computer controlled multiplexing of audio or vide signals from the RS232 serial port of your computer.
ports, monitor, analyze, communication, emulator, driver, servo, anolog, home automation, control, relay driver, relay
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NCD ActiveX Control

Free - National Control Devices
The NCD ActiveX Control makes it easy to control NCD devices from any programming language that supports ActiveX. It supports most NCD Devices except graphic display products. With it, you may create a complex control application in minutes. The NCD ActiveX control works great with ANY version of Visual Basic, and even allows you to send and receive raw serial data via the serial port.
video, digital, motor, switcher, motion, relay controller, industrial automation, light dimmer, rs485, controller, load, stress
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TVicPort

Free - EnTech Taiwan
TVicPort is set of general purpose device drivers that allow you to access and control hardware directly from without using the Windows DDK. TVicPort's main capabilities are:
- direct port I/O access;
- obtains pointers to the physical memory;
- advanced LPT support including access to any pin on any LPT port;
- access to IDE HDDs hardware manufacturer information.
- Windows XP 64-bit support.
barcode, serial wedge software, redirect serial to tcp, rs 232 to keyboard converter, ethernet to keyboard, wedge, soft keyboard wedge, serial to keyboard converter, tcpip to keyboard, keyboard wedge software, splitter, virtual
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SAL232

Free - HW group s. r. o.
Sal232 is effective, user friendly utility when you need to analyze and log your serial communication. Received data are stored together with time marks that can be used to read time context. Specific details (time delay, Hex characters, etc.) are highlighted with various colors. Recorded data can be stored in .RTF file. It's only one .EXE file and no installation is required. It's distributed as freeware.
windows, redirect, client, pair, server, connect, serial port emulation, serial over ip, serial over ethernet, virtual serial port, rs 485, rs 232
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