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Topic: Ultrasonic Remote Control (Read 660 times) previous topic - next topic


I just bought two HC-SR04 ultrasonic sensors on eBay, and was wondering if it was possible to use them to send / receive data. If this is possible, it would be a great alternative to IR, as it wouldn't be limited to line of sight, and each module has both tx and rx. Can this be done? I was thinking something like a tv remote transmitting to an arduino base station which would transmit ultrasound towards the ceiling, with a robot with an identical module also pointing at the ceiling, allowing the robot to be controlled without line of sight (wall, couch, etc nothing long range or even outdoor) and be transmitting data to the base station.



Yes you can do that.  You might need to add some additional circuitry to get the best results, but there should be no problem with the concept.  Since the carrier frequency is the same range, you could probably make use of the IR library to send and receive information.  You might not achieve stellar baud rates, but you should be able to get data thru easily.
Experience, it's what you get when you were expecting something else.

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