RS232 Port Monitor

Monitor, log and analyze
RS232/422/485 port

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Case Studies

Client: David Coward

"I liked COM Port Monitor straightaway. Its interface was clean, clear and easy to understand. It did exactly what it said it would do and the flexibility of saving the files for later analysis was very powerful."

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Build Info
File size:
Latest build:
Release date:
7th February, 2015
Build compiled:
17th July, 2015
Compatible with:
User ManualChangelog (RSS)
serial port capture - rs232 port monitor

RS232 Port Monitoring software

Serial Port Monitor is an advanced tool for RS232/422/485 COM port monitoring. Intended for professional users, it can monitor, display, log and analyze all serial port activity in the system. While being user friendly, the utility provides advanced filtering, searching and representation capabilities.

Serial Port Monitor can be purchased as a Standard or Professional Edition

rs232 port monitoring

With Serial Port Monitor you can:

Analyze Serial Port activity

Serial Port Monitor can connect to any COM port (even to the one already opened by some application) and immediately start monitoring the port. As this tool captures data in real time, it may be very useful in troubleshooting. Serial Port Monitor lets you intercept and record all serial input/output control codes (IOCTLs) and track their settings and parameters.

The captured data can be redirected to a specific file or copied to the clipboard. Any monitoring session can be saved and loaded whenever needed.

monitor several ports

Monitor multiple ports and devices

Serial Port Monitor is equipped with a unique feature that enables you to monitor multiple ports at the same time. This provides you with information on how apps work with multiple ports and devices in parallel during one session. Information received will be recorded in a single log on a first-in basis, so it's easy to read and analyze.

capture serial port

View captured data in various ways

Serial Port Monitor lets you view data in any of the four view modes: table, line, dump, or terminal. You can set monitoring filters in order to keep track of specific events only.

rs485 monitoring software

Emulate data transmission to a serial device
(available in Professional version only)

Using the terminal mode feature of Serial Port Monitor, you can send data to the serial port being monitored in any format you need (string, binary, octal, decimal, hexadecimal, or mixed), e.g. to make that data look as if it originates from a specific application. This approach may be handy for following the response of the device connected to the COM port to certain commands and data.

Full features list:

  • Start/stop monitoring the serial port that is already opened by another application (available in Professional Edition only)
  • Serial Port Monitor is completely compatible with Windows 10 (both x32 and x 64)
  • Serial Port Monitor and all of its internal drivers are digitally signed
  • Any number of serial ports can be monitored simultaneously
  • Possibility to add several ports for monitoring in one session
  • Supports all COM-port types: standard on-board ports, extension board ports, software-based virtual COM ports, bluetooth serial ports, USB to SERIAL cradles, etc
  • Data transmission monitoring and logging
  • Advanced send dialog: easily send various types of data, apply aliases for faster typing and automation, send files and loop functions and commands, change serial port parameters on-the-fly (available in Professional Edition only)
  • Real-time data capturing
  • Various monitoring visualizers: table view, line view, dump view, terminal view
  • Incoming and outgoing data streams logging
  • Redirected file can be either split into a bunch of files or can be limited to user-defined size
  • Possibility to export raw data to a file in Terminal view
  • Multi-colored commands display in table view
  • Any software/hardware that works with a serial port can be monitored
  • Intercept and record all serial input/output control codes (IOCTLs), tracking their full details and parameters
  • Customizable monitoring session logging (several timestamp formats, different scale of notation, customizable logging string length etc.)
  • Convenient and flexible monitoring session's management: saving and loading all monitored data, exporting and redirecting to file functions
  • Monitoring session exporting (HTML, ASCII text, UNICODE text, Exсel CSV) and automatic redirection to file (Serial Port Monitor will automatically append all monitored data to a file in real-time)
  • Supports copying all recorded data to clipboard
  • Supports adding data automatically before and after packet to be transmitted
  • Full duplex mode supported
  • Control lines status visualized
  • Unique stream filtering tools with presets
  • All baudrates supported
  • Flexible configuration: stopbits, flow control, parity control, data bits, highlighting, etc.
  • User-friendly flexible interface: the software is designed to provide easy access to serial ports, no programming skills are required

Demo version limitations:

  • fully functional 14-day trial

Compatible with:

  • 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

Interface languages:

# Feature Standard Professional
1 Monitoring serial ports which are already in use
2 Sending/receiving data to/from any COM port (Advanced Send Dialog)
3 The possibility to change COM port parameters from Advanced Send Dialog
4 Any serial port software/hardware can be analyzed
5 Monitor any number of serial ports at once
6 Supports all COM-port types
7 Intercepts all data read from/written to COM port
8 Built-in search
9 4 types of customizable monitoring visualizers for viewing and logging data
10 Tracing all serial input/output control codes
11 Copying all recorded data to clipboard
12 Saving, loading and exporting all monitored data
13 Full duplex mode
14 Unique stream filtering tools with presets
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