java lib for Modbus communication

.. we are opening the source code.

It was some kind of the weekend project, but it’s real, up and running now. The MODBUS/TCP client library (which has been included in IQarium) is available on GutHub. You are free to download it and use it as you wish.

Link to the git repository:

For your convenience I made a simple CLI wrapper to communicate with the PLC using command line. Just download compiled java archive (mbcli.jar) from and use your favourite java runtime to set/read modbus coils or registers from command line.

To run the app and display the usage help message just do:

java -jar mbcli.jar -h

have fun …
p.s. with FATEK plc works great


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