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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 21, 2026
The MODBUS RTU,TCP,ASCII software has been slightly modified to version 5.0.1 build 703.
Added more than 20 new MODBUS devices to our database. Please, go to the download area and get an update.
July 21, 2026
New version 4.1.6 build 721 of the Advanced OPC Data Logger program has been released.
Fixed a bug where the same value was exported if variables in the group were exported separately. You can find the update in the Download area.
July 21, 2026
Ann: New build 5.0.1 build 717 of ASCII Data Parser is available.
Added a possibility to ignore parser items that do not exist in a data packet. You can download an update in the Download area.
July 3, 2026
Ann: The new build of all our data loggers is available.
Fixed a regression bug with slow program loading. We've improved the OPC UA server security. Various small bugfixes in plugins. Please, go to the download area and get an update.
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.

news archive

Our software overview: RS232 software