Patrol mode is when you send R2-D2 to survey his surroundings autonomously. Your Droid maps out collisions with objects in the room and sends information back to you, which includes readings on his speed, temperature, and a graph of his motions around your space.
Follow the link for more information about what you can do with R2-D2.
If you have any questions or concerns, please follow the link to open a new support ticket.
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