Simple Serial Port Monitor download

It is a program that allows you to monitor your serial ports
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Alternative software

HHD Software Device Monitoring Studio
HHD Software Device Monitoring
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Monitor the devices attached to your system and control its data flow.

Advanced Serial Port Monitor
Advanced Serial Port Monitor
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This app allows you to check the flow of data through a computer's COM ports.

Free Virtual Serial Ports
Free Virtual Serial Ports
Free
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It allows you to create virtual serial ports and emulate their behavior

SUDT SerialTrace
SUDT SerialTrace
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SerialTrace is a professional Serial Port Monitor that monitors, displays

Serial Port Sniffer ActiveX Control DEMO
Serial Port Sniffer ActiveX
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The program is a powerful and feature-rich ActiveX component.