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Published on Feb 6, 2012
The Code Monkeys at DIY Sandbox have come up with a nifty wireless interaction demonstration using two Hydrogen WiFi Arduino shields, a Parallax Ping sonar sensor, and an LED 'lamp.' One Hydrogen is attached to the sonar sensor, and the other is attached to the lamp. The two Hydrogens are connected to the same WiFi network. When the sonar sensor is activated, it turns on the lamp. When the sensor is activated again, the lamp turns off.