Serial Port Monitor is a professional and powerful system utility for monitoring RS232/RS422/RS485 ports. The COM monitor displays, records, and analyzes all serial port activities in the system. This is an ideal method for tracking potential issues that may occur during application or driver development, serial device testing, and optimization processes.

The product also provides advanced filtering and search functions, professional built-in terminals and data output options, and key advantages of user-friendly and flexible user interface. This is a complete software solution, and you don't need any additional hardware to use it.

The Serial Port Monitor can be purchased as a standard professional or company version.

Using the Serial Port Monitor, you can

Official User Manual:https://www.eltima.com/wiki/user-guides/spm-user-guides.html

Analyze serial port activity

The serial monitor can even connect to a COM port that has already been opened by any application to start sniffing it. All data passing through the monitoring port will be displayed in various views in our monitoring tool. The table view packet function transcribes script prompts from the row view. Everything is captured in real-time, so you can immediately trace the problem. The synchronous highlighting of similar IRPs in different views is particularly convenient for comparison.

In addition, you can redirect all monitoring data to a specified file, or you can copy all recorded data to the clipboard. The COM port monitor enables you to intercept and record all serial input/output control codes (IOCTLs), and track all their details and parameters. You can save any monitoring session and load it the next time you need it.

Monitoring several ports in a session

This software has a unique feature of monitoring multiple COM ports simultaneously. Now, you can collect data about how an application interacts with two or more ports and a small number of devices simultaneously in a session. The data received and sent during the monitoring process will be displayed (recorded) in a log based on the principle of first in, first out; This makes the analysis more convenient.

Reading captured data in different ways

You can view data in all four monitoring views simultaneously: table, row, dump, or terminal mode. The dump view can display binary, ASCII data, and port settings. COM monitors allow you to choose monitoring filters, saving you time and allowing you to track only the events of interest. You can also apply capture options during the ongoing monitoring process.

Send simulation data to serial devices

You can use various formats (string, binary, octal, decimal, hexadecimal, mixed) to send data to the monitored serial port, just like using the terminal mode function of the serial monitor to send data on behalf of the monitored application. This allows you to track the response of the monitored serial device to some special commands and data.

Fully supports Modbus RTU and Modbus ASCII protocols

The COM port monitor will facilitate the use of new efficient filters to read and analyze Modbus data. With our serial monitoring software, you can easily establish connections with RS485/RS422/RS232 devices and analyze their data.

Play and Session Comparison

The serial port monitor provides a unique possibility for session playback - you can resend data received from the application to the serial port. In this way, you can view the port's behavior when receiving the same data to obtain more accurate monitoring results. You can also compare sessions by automatically displaying the differences between them.

Full Functional List of Serial Port Monitor

• Start/stop monitoring serial ports that have been opened by other applications (Professional/Company Edition only)
• Fully compatible with Windows 10 (including x32 and x64)
• The serial port monitor and all its internal drivers are digitally signed
• Can simultaneously monitor any number of serial ports
• Multiple monitoring ports can be added in one session
• Supports all COM port types: standard onboard port, expansion board port, software based virtual COM port, Bluetooth serial port, USB to SERIAL cradle, etc
• Data transmission monitoring and recording
• Advanced Send dialog box: Easily send various types of data, apply aliases to accelerate input and automation, send files and loop functions and commands, and change serial port parameters in real-time (Professional/Company versions only)
• Real time data capture
• Various monitoring visualization tools: table view, line view, dump view, terminal view
• Incoming and outgoing data flow logging
• Redirected files can be divided into a pile of files or limited to a user-defined size
• You can export raw data to a file in the terminal view
• Multiple color commands displayed in table format
• Any software/hardware that works with a serial port can be monitored
• Capture and record all serial input/output control codes (IOCTL), track all details and parameters
• Customizable monitoring session logging (multiple timestamp formats, different recording tables, customizable logging string length, etc.)
• Convenient and flexible monitoring session management: save and load all monitoring data, export and redirect to file function
• Monitoring session export (HTML, ASCII text, UNICODE text, Ex с ElCSV) and automatic redirection to files (serial end
• The monitor will automatically attach all monitoring data to the file in real-time
• Supports copying all recorded data to the clipboard
• Supports automatic addition of data before and after packet transmission
• Supports full duplex mode
• Visualization of control line status
• Unique stream filtering tool with preset settings
• Supports all baud rates
• Flexible configuration: stop bit, flow control, parity control, data bit, highlighting, etc.
• User friendly and flexible interface: The software is designed to provide convenient serial port access without the need for programming skills
• Annotations section in table view
• Quickly filter customizations in the toolbar
• When monitoring is inactive, a new data redirection file can be created
• The statistics in the status bar highlight IRP from the first to the last in the Table view. The IRP in the Table view now has transcriptional prompts from the Line view
• Filter data by port
• The data that the application attempts to write to the port not only displays the actual data written, but also displays
• Automatic scrolling of terminal views can be disabled
• You can continue writing existing data in the file with new command-line options without overwriting the existing data