ros_lib arduino IDE issue Rosserial

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Hi. Im trying to use ros with the arduino, using the following rosserial tutorials.

http://www.ros.org/wiki/rosserial_arduino/Tutorials/Arduino%20IDE%20Setup

After installing the Arduino IDE on Ubuntu 12.04 and copying the ros_lib folder into the sketchbook/libraries folder, I found that the IDE had not included these new files into the import library or the examples menu.

I tried copying the required header files for the hello world tutorial into the same folder as the hello world sketch but the compiler could not find them. I looked around and found that all the header files in the library need .cpp files or thats what i understand. So basically i am unable to include any of these ros_lib files.

Can any one help?