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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.
port, rs232, serial, device, data, driver, servo, anolog, home automation, control, relay driver, relay
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COM Port Stress Test

Free - AGG Software
If you are puzzled by having to stress-test COM/RS232 ports and see no easy way to do that, make sure you don't miss COM Port Stress Test, as it does exactly what you need! COM Port Stress Test is a compact and affordable tool for testing COM, RS232 and RS485 (with converter) ports that generates an extremely fast data stream with alternating baud rate, flow control, RTS and DTR states. Try this software now and you won't be disappointed!
video, digital, motor, switcher, motion, relay controller, industrial automation, light dimmer, controller, testing, emulator, system
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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).
stress test, com port, view, packet, analysis, monitoring, analyzer, activity, viewer, connection, modem, traffic
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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.
transfer, reader, test, capture, sniffer, ports, monitor, analyze, communication, splitter, virtual, windows
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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.
redirect, client, pair, server, connect, live chat, customer online support, online sales software, live chat support, barcode, live support, serial wedge software
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NCD Command Tool for dos

Free - National Control Devices
The NCD.EXE allows you to control NCD products directly from a command line interface in DOS. NCD.EXE does NOT require 3rd party tools or components, as it speaks directly to DOS. With NCD.EXE, you may test and control an NCD device directly without programming. It can also be used in a batch file to do complex jobs or called in your own program. NCD.EXE is a free distribution for use ONLY with NCD products.
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