Making an assumption,
NOTE: What I assume is probably wrong.
in EasyC, when you download the code, there is no way to go from enable to disable like there is RobotC. So I'm pretty sure that without the transmitter being on, your robot is in disabled mode and with it on, your code runs.
I haven't actually gotten to run code in RobotC, but looking at the video, I don't think one needs the controller.
That's an assumption.

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