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3.0 Stars (1)
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mbutils is a library and set of utilities written in FreePascal/Lazarus with intention to provide developers with free and robust tools to communicate with Modbus devices.

mbutils Web Site


  • Object oriented design.
  • Both, master and slave implementation.
  • Easy to extend with new query types.
  • Easy to extend with new transport types.
  • Absolutely free. No strings attached.


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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 1 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 1 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    I converted the code to Delphi. It had some bugs in it but nothing major. At some point I kept getting blue screens (SYSTEM_SERVICE_EXCEPION with bugcheck 0x0000003B). It turned out that my trusty USB-->serial converter was misbehaving (Belkin F5U103v). Swapped it for a new one and all was fine! What I like about this library is that in combines Modbus TCP / RTU and ASCII in one library.

    Posted 07/05/2017
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Additional Project Details



Intended Audience

Advanced End Users, Developers

Programming Language

Free Pascal



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