I am working on an opencv sentry gun project, and I am now working on making the camera follow a green ball, and keep this ball in the center of the picture using servos to change the view. The eclipse ball tracking program works fine. My plan is to have the camera, attached to a servo, be connected via usb to the computer, and have eclipse analyze the video feed. The eclipse program will send up, down, left, or right to the arduino, telling it which way to move the servos. My arduino program would only be code that reads the serial value it is sent, and then move the servos. THE PROBLEM IS THAT I DONT KNOW WHAT LIBRARY OR CLASS TO USE THAT WILL ALLOW ME TO COMMUNICATE FROM ECLIPSE TO ARUINO(using the serial port). Please provide any insight on libraries to use, if it is possible, or other means of communicating from eclipse to arduino.