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Data logging and monitoring software for COM, TCP, USB, ports

Our advantages:

  • Our data logging software can capture data from various serial port types (RS232, RS485, USB, VCP).
  • Data logging and monitoring software for many protocols and data formats like TCP, UDP, NMEA, MODBUS, OPC and DDE.
  • Data loggers collect data in real-time 24x7.

Latest news

July 3, 2026
OPC Server Simulator 2.0.4 build 703 has been released. This update fixes some small "bugs".
Added security certificates for the OPC UA server. We've added a new command to generate a certificate for your computer instead of a default one. Download.
July 3, 2026
Datatag Link comes with the following changes:
Improved security certificates in the OPC UA server. The new version of the software you can download in the Download area.
July 3, 2026
Advanced Serial Port Monitor gets a couple of updates.
1. We've significantly improved the MODBUS slave simulation plugin (new interface, storing registry maps to CSV files, new simulation modes).
2. We've fixed some minor bugs in the ASCII/Binary device simulation plugins. More on.
June 15, 2026
Ann: New build 5.1.6 build 615 of All our data loggers is available.
We've improved all plugins (loading time, dialog opening time). Added Japanese, Korean, and Chinese (traditional) translations. Download.
May 18, 2026
CNC Syntax Editor 3.3.0 build 518 has been released.
We have accelerated program and backplotter launch. Take a moment and then download it in the Download area.
May 15, 2026
The Advanced Serial Port Monitor software has been slightly modified to version 4.7.2 build 515.
Continuation of optimizations. The new version starts noticeably faster. It handles data better at high speeds. Please, go to the download area and get an update.

news archive

Our software overview: RS232 software