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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

October 8, 2025
The MODBUS plugin has been slightly modified to version 5.0.1 build 1007.
We've improved reading data from Sunspec-compatible MODBUS devices. Improved the "MODBUS slave" mode. Take a moment and then download it in the Download area.
October 8, 2025
DDE server comes with the following changes:
Now, the plugin can send real-time data about active items to a console application. It makes it simpler for you to keep an eye on the service's data flow status. More on.
October 1, 2025
Direct Excel Connection has been updated.
Now, you can select the Excel .xlsm files as a template for newly created or opened files. The new version of the software you can download in the Download area.
October 8, 2025
AGG Software has released an update for all our data loggers.
- Improved service mode: the console can now receive real-time data from certain plugins running in the service.
- Enhanced logging in the "create a new log file after a timeout" mode: after a restart, the program resumes the unique counter from the last value.
- The previous version didn't restore a configuration from a backup if a data source (e.g. a COM port) was absent in the system. You can download an update in the Download area.
August 22, 2025
AGG Software has released an update for Datatag Link, bringing it to version 1.1.7 build 822.
We have improved the MODBUS slave mode, OPC data reading, and reduced data flickering in the program's main window when displaying status with many tags. Download.
July 8, 2025
Ann: SNMP Data Logger 3.0.8 build 708 is available with several changes.
Improved ability to read SNMP data from devices that might react slowly. More on.

news archive

Our software overview: RS232 software