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RS485 Protocol Analyzer
RS485 communication software

Serial Port Monitor refers to a powerful but professional system utility used for RS232/RS422/RS485 port monitoring. COM monitor performs the task of displaying, logging and analyzing every serial port activity in a given system. It's a perfect way to figure out problems that may come up during the development,
testing or optimization of an application or driver.

Also, this product fully supports advanced filtering search, data exporting options and professional built-in terminal, an easy-to- use interface, and more. It's a software solution that is complete on its own and requires no additional hardware before it can be used.

Serial Port Monitor is available for purchase as a Standard, Professional or Company Edition.

With Serial Port Monitor you can

Serial Port Monitor gives you the freedom to perform serial port activity analysis.

You can connect a Serial Monitor to a COM port that is already open by another application so you can begin sniffing right away. All data that passes through the monitored port will be available in several views in our monitoring tool. The transcript hint from Line view is featured in table view packets. Everything gets captured instantly so that you can identify problems quickly enough. The synchronized highlighting of similar IRPs in varied views is especially ideal for comparison.

Moreover, you have the option of copying all recorded data to clipboard or redirecting all monitoring data to the file specified. COM Port Monitor allows you to intercept and record serial IOCTLs (serial input/output control codes), monitoring all parameters thoroughly. Any monitoring session can be saved and loaded again whenever you need to use it.

Monitor multiple ports within a single session

This software comes with a special functionality that allows it to monitor multiple COM-ports simultaneously. Now it's possible to gather data on the interaction of apps with two or more ports and some devices that are running concurrently within a single session. Send and receive data during monitoring will be represented in a single log using a first-in-first-out approach; that way it's more convenient to analyze.

Read captured data in different ways

Data can easily be viewed simultaneously in all four monitoring views: dump, time, line or terminal mode. Dump view is capable of displaying port settings, binary, as well as ASCII data. With COM Monitor, you can select monitoring filters, thereby saving time and allowing you to keep abreast with only the events in which you are interested. It's also possible to use Capture option during the ongoing monitoring process.

Emulate data sending to serial device

Data can be sent in various formats (hexadecimal, string, decimal, binary, mixed, octal) to monitored serial port as if terminal mode feature of Serial Monitor was used to send it on behalf of the monitored application. Thus you can follow how the monitored serial device reacts to some special commands.

Fully supports Modbus ASCII protocols and Modbus RTU

COM Port Monitor is equipped with new efficient filters which will facilitate the reading and analysis of Modbus data. Our serial monitoring software can help you establish connection with RS485/RS422/RS232 devices easily, as well as thoroughly analyze their data.

Playback and session comparison

Serial Port Monitor makes it possible for you to get a unique session playback – data received from the app can be sent again to the serial port. This way you can easily review port's reactions as it receives the same data for better results. Also, it's possible to compare sessions with automatic display of differences that exist between them.

List of full features of Serial Port Monitor

Equipped with Start/stop that monitors the serial port opened by another app (only available in Company/Professional Edition)
Supports Windows (both x 64 and x 32)
Serial Port Monitor, as well as its internal drivers, are digitally signed
It's possible to monitor multiple serial ports simultaneously
Several ports can be added for monitoring in a single session
Compatible with all types of COM-ports: USB to SERIAL cradles, standard onboard ports, Bluetooth serial ports, software-based virtual COM ports, etc
Logging and monitoring of Data transmission
Advanced send dialog: send different types and forms of data easily, adopt the use of aliases for automation, send files and commands, make changes to serial port parameters in real time (only available in Company/Professional Edition)
Instant data capturing
A range of monitoring visualizers: terminal view, table view, dump view, line view

Compare STANDARD and PRO/Company versions

# Feature Standard Pro
1 Capacity to monitor serial ports that are already in use
2 Sending and receiving data to or from any COM port
3 You can alter COM port parameters from Advanced Send Dialog
4 Possibilities of analyzing any serial port software or hardware
5 Capacity to monitor multiple serial ports
6 Supports any COM-ports
7 Ability to intercept data that is read from or written to PC COM port
8 An inbuilt search
9 Incoming and outgoing data streams logging
10 Four types of customizable monitoring visualizers for viewing and logging data

Let's get started

Serial Port Monitor
Demo version limitations
• fully functional 14-day trial
System Requirements
Windows (32-bit and 64-bit): XP/2003/2008/Vista/7/8/10, Windows Server 2012/2016/2019/2022
Latest Update
Version 8.0.410 (9 Jun, 2021) Release notes