Requisite hardware setup is very simple: just verify and upload the below sketch to Arduino Uno and that’s all! The sketch enables Arduino to receive instructions (which will actually be in ASCII) ...

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The Arduino UNO (Figure 1) is the latest version of the basic Arduino board, and you need one of these to follow this article (see Resources for the UNO's detailed specifications).

You can easily add Internet-based control for your Arduino if it is close enough to your server to be connected via USB. This tutorial will give the basics you need to get it working. The gist of t… ...