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Serial Port Sniffer AX
Monitor data between COM port and app

Serial Port Sniffer ActiveX Control can monitor data flows and even edit them! It creates an additional virtual COM port in the system with the same name as the monitored serial port. All data sent to and from a serial port goes to the virtual port created by this component and is displayed in a convenient way. You can substitute data chunks with the data of your own, thus influencing the process of serial port sniffing. This real-to-virtual/virtual-to-real data transmission chain can slow down the process of data interchange a little. But in this way Serial Port Sniffer ActiveX Control gives you the ability to take part in data monitoring, not just watching the data pass to and from port.

Common objectives and our solutions

Monitor data flows between serial port and application

Serial Port Sniffer ActiveX gives you the unique opportunity to monitor data flows between application and serial port. You can detect control lines changes, handflow, baudrate and ring state changes, and track timeout updates. Serial Port Sniffer Components methods allow you to check whether the port is being sniffed, open the serial port to be sniffed and close the port after sniffing.

Replace data being sent between port and application with your own commands

You`ll be able to influence even the monitoring process! Using Serial Port Sniffer ActiveX Control you can easily substitute data with any data characters and commands of your own to get deeper into the monitoring process (it becomes possible because all transmitted data are intercepted in the virtual port created by our component).

Take full control of all signal lines

All signal lines (DTR, RTS, CTS, RTS) are supported. Besides, the component's events include all of these lines state changes.

Full features list

Monitor and edit serial data streams directly from your application
Unique ActiveX Control - no need to use additional software for monitoring
Wide selection of supported events, methods and properties
Control lines support (DTR, RTS, CTS, RTS)
Usage examples for Microsoft VC++ and Microsoft Visual Basic included
No reboot required during installation and implementation
Serial Port Sniffer ActiveX drivers successfully passed Windows Hardware Quality Labs (WHQL) tests and are digitally certified by Microsoft
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Compare Serial Monitor AX and Serial Sniffer AX

# Feature Serial Monitor AX Serial Sniffer AX
1 Change control chars +(OnIrp)
2 On/Off break +(OnIrp)
3 Read data substitution
4 Write data substitution
5 Exact events timestamps
6 Read 6 Kb of data(sec) 6 10
7 Stop sniffing when port is opened
8 Start sniffing when port is opened
9 Detect Ring
10 Write to port

Let's get started

Serial Port Sniffer ActiveX Control
Demo version limitations
• Reminder when invoking Start() method.
System Requirements
Windows 2000, Windows XP (32-bit and 64-bit), Windows 2003 (32-bit and 64-bit) , Windows 2008 (32-bit and 64-bit) , Windows Vista (32-bit and 64-bit), Windows 7 (32-bit and 64-bit), Windows 8 (32-bit and 64-bit), Windows 10 (32-bit and 64-bit), Windows Server 2012
Latest Update
Version 5.2.90 (4 Jul, 2011) Release notes