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don't forget to connect the refnum
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One of the inputs to the Joystick and Motor blocks, the one on the top left, is called a refnum. Refnum is shorthand for Reference Number. It tells the block which joystick or motor to operate on.
The refnum is created by the Open block and can be stored and retrieved by name.
Take a look at Begin to see some being opened and saved, and Teleop to see them being retrieved and used for RobotDrive and Joystick.
Greg McKaskle