Tutorial: Control devices over the Internet with Arduino
Controlling devices over the Internet is certainly possible, and there are an almost infinite number of methods to make it happen. One simple yet effective method is using Ethernet-enabled Arduino boards and various data protocols. Once example of this has been published by Instructables user "akellyirl". Their tutorial describes how to control Arduino digital outputs over the Internet via UDP (user datagram protocol). After reviewing this you should be up to speed on Arduino and Internet-control in no time. Furthermore, a short demonstration follows in this video:
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