Here is another proof of concept I did to show Bluetooth communication between Android phone and NXT. I used the accelerometer and magnetic field sensors on the Android phone to calculate its compass heading, and used Bluetooth to send that information to the NXT. While this is not as stable as Brian Davis' Jenn Too, mostly due to magnetic interference from the NXT messing with the compass, it definitely shows the potential Android phones have acting as on-board sensors for autonomous robots.
Richard
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