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HHD Software Free Serial Port Monitor - RS232 Communication Software Data Sniffer and Analyzer. Analyze Your Com Port Communication Data Traffic. Freeware Modem Data Capture Utility, Connection Test Tool Packet Analyser

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Hex Editor, Serial Port Monitor, USB Protocol Analyzer and Data Logger Network Monitor

Serial Port Monitor, free download. Serial Port Monitor 5: Monitor RS232/422/485 COM ports in network.

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Advanced Serial Port Monitor, Advanced Serial Data Logger and wide range of RS232 port software

Windows software to monitor a serial port. A free RS232 sniffer. With ABB RP570, SPA-bus and NMEA 0183 decoding.

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ELTIMA Software is a global information technology company, specializing in virtual serial communications, multimedia software development and quality web-development solutions