Serial Port Monitor

Serial Port Monitor Integration

Free Serial Port Monitor overview

The software is designed to assist you in analyzing communications established between a computer and connected serial equipment.

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  COM port data logging

  FREE Serial Port Monitor has a simple interface, so to begin serial logging, you just need to select a serial port, choose where to file serial communication data, define RS232 port's parameters and click "Start".
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  Working in a virtual environment

  FREE Serial Port Monitor can be installed and used under virtual machines, like VMware or Hyper-V. Such functionality can be successfully used for testing. Our serial port logger is great for learning purposes, too.
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  Collecting serial data in real time

  When you attach COM-based devices, like scales, meters, barcode scanners, etc. to an RS232 port of your computer, FREE Serial Port Monitor lets you connect to this port and collect data it receives from the serial equipment. With FREE Serial Port Monitor, it's simple to see and learn how serial ports work!

Serial Port Monitor overview

Serial Port Monitor is a highly-functional and friendly utility that works with RS232/RS422/RS485 ports and allows you to save a lot of your time while developing and testing serial applications and hardware. It offers the full set of advanced port monitoring features, including a built-in terminal, unique data filtering options, convenient data viewing modes, session playback capability, and more.

• Analyzing COM port data

  If a COM port you want to monitor is already opened by a third-party application, Serial Port Analyzer will still be able to connect to it and record its activity. It will capture the port’s data and display it to you. Serial Analyzer software will let you select whether to show serial data in the Table, Line, Dump or Terminal mode. Also, you can enable all available visualizers at a time.

• Data viewing modes

  With the Table view, you get the data in the form of a table consisting of the recorded IRPs. When you select the Line view, you will see more details about each request passing in and out of a monitored COM port. The Dump view will display all incoming and outgoing data in hexadecimal and string formats as a data dump. In the Terminal mode, the monitoring data will be shown as ASCII characters.

• Saving data to a file

  All captured data, including serial input/output control codes (IOCTLs) with full details, can be recorded to a selected file. Also, you can save your monitoring session and load it next time you need it. Serial Port Monitor software allows reading serial port data in real time, which means you’ll be able to solve any problem immediately after it occurs.

• Monitoring of multiple ports

  Serial Port Sniffer lets you test an unlimited number of COM ports within one RS232 monitoring session. Just select “Start session” in the main menu of the app and get the ability to track the communications of any serial program with several devices at a time. All data will be recorded using the first-in, first-out method, which makes it more convenient for analysis.

• Sending commands via a terminal

  With RS232 monitor software, you can not only log serial traffic but also emulate sending data to a particular serial port as though it were sent from the monitored app. This enables you to easily check how a device connected to this port reacts to specific data.

• Parsing of Modbus RTU/Modbus ASCII

  The Modbus Sniffer makes it possible to perform monitoring and analysis of Modbus communications. It allows intercepting Modbus RTU and Modbus ASCII frames exchanged between Modbus-enabled devices or apps.

Feature list comparison

Check out the main differences in feature packs of free open source and advanced versions

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Frequently asked questions about Serial Port Monitor

How to monitor serial port traffic?

Is it possible to monitor multiple COM ports simultaneously?

How to test a serial port with SPM?

• COM Port Monitoring