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Just in case someone else is also struggling with it. We published a wrapper package for ROS indigo with pymodbus. There are some python example scripts how to use the modbus and also and interface with standard ROS messages, if you want to communicate from c++.
As modbus is often used with PLCs, we also made some examples and corresponding projects for a Siemens PLC, as well as a Cognex insight 7200(C), both as modbus servers.
Just install libmodbus ( http://libmodbus.org/ ) to your system (download, extract, ./configure, make, sudo make install). Now you can use its API in your ROS node as in any other program. Further, the following file can be helpful for finding it in your CMakeLists.txt:
Asked: 2012-05-09 23:53:12 -0500
Seen: 8,627 times
Last updated: Nov 20 '14
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