Serial Port Monitor software - RS232, COM and serial port monitor, sniffer and analyzer tool
For Windows 2000 - Windows 11 (2022) (incl. Server, x86 and x64). Latest version: 4.5.0 build 324. March 24, 2025.
Brief description:
This program allows you to check the flow of data through a computer's COM ports. As you can see from the software name, this application can work as a serial port monitor. It supports full-duplex mode, flexible adjusting of parameters, logging data to file, automatic and manual modes, various data sources, serial device simulation, plugins, and the sniffer mode. It is recommended for advanced users and automation specialists.
What problems can be solved with Advanced Serial Port Monitor?
You can work without any effort with any equipment working over any RS232/RS485/RS422 serial interface. You can use the serial port monitor to monitor data exchange between serial devices connected to a serial port and any Windows application. It may be the measuring device, the industrial controller or amateur radio station, and the other personal computer connected through a z-modem cable. In any case, you will work with a friendly and convenient interface with maximum comfort.
Note! You won't have to install any additional hardware or software to analyze the protocol. All you need is just the Advanced Serial Port Monitor application installed on your computer!Getting started is easy. Advanced Serial Port Monitor is ready!
After installation, start Advanced Serial Port Monitor, then connect one device to a free serial port. Select the COM number and click the "Open" button. Now, you can send data to your device and receive data from them. You can change the program mode (terminal or sniffer) from the "Mode" menu. (Check our step-by-step serial port monitor tutorials)
Features:
Sniffer (Spy) mode. Using the sniffer mode, you can monitor data exchange between an external device connected to a serial port and Windows applications.
RS232 Terminal Mode. Our software is not just a sniffer. Using the RS232 terminal mode, you can send and receive any data from a serial port to debug and diagnose your external devices.
HEX and ASCII. Displays incoming and outgoing data in HEX, ASCII or binary formats.
Flexible configuration. Our serial port monitoring utility supports the different baud rates (up to 921600), user-defined baud rates, number of data bits, number of stop bits, different parity types, hardware or software flow control, and other. You can change all communication parameters at any time.
Sending data. With Advanced Serial Port Monitor you can send data manually (click over "Send" button) or automatically through defined by you interval (from 10ms to 10000ms).
Any data source. The serial port monitor can send data from text or binary files. Also, you may type a data string in the program window. You can insert characters with code from 0 to 31 (0 - 2F Hex) from a popup menu.
Log files. All received bytes can be saved to a file, complete with precise timestamps, with our program. When dealing with high-speed data flows, this feature is particularly valuable because it ensures that no detail is missed.
Plugins. With our plugins you can transfer files, emulate MODBUS or ASCII devices, debug and execute scripts.
Full duplex mode. With our program, you can use full-duplex mode to send and get information at the same time. This feature is especially helpful when you monitor and control devices in real-time during your UART monitoring sessions. This ability lets you stay in touch with your devices, which makes you more productive.
Build-in scripting engine. Our built-in scripting engine lets you use your Port Monitor to its full potential. This useful tool lets you use Port Monitor with preset options and actions that match your work process. We have a lot of plugins that let you make your automation work for you. Our scripting engine can help you make repetitive tasks easier or make complicated monitoring systems more efficient. Our priority is your success, and your success is our priority.