Be on the lookout

Many students think that if they are using an RCX Sensor Watcher, their program is set to check the message repeatedly. They are right to a certain extent—a sensor watcher does check for messages repeatedly. What they sometimes forget, however, is that there’s already a message stored in its memory and that it can’t receive a new one until the old one is cleared.

What you can do: Use the container analogy described in the Discussion Points section.


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