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Originally Posted by BradAMiller
One way of sending extra information to the dashboard port is to load up all the unused PWM ports with values. If nothing is connected to the RC ports it doesn't seem to matter, but the values get sent.
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If the PWM output port isn't connected, it won't have any effect on the robot. However, you probably should give a little thought as to how you do this. If you're sending purely arbitrary values in unused PWM bytes and the user bytes, you could end up with additional 0xFF, 0xFF byte pairs that could make your start of frame detection algorithm more complex or unreliable.