With all the buzz around Wi-Fi, Bluetooth, and other wireless technologies, it's easy to overlook one of the simplest and most common forms of wireless communications out there: infrared. Anyone who's ever used a remote control has used it! Infrared makes use of the invisible spectrum of light just beyond red in the visible spectrum. You can use it in applications for short-range, point-to-point data transfer. Because it uses light, line-of-sight is a prerequisite for infrared. Despite this limitation, infrared is increasingly popular in devices such as digital cameras, PDAs, and notebook computers. In this article, Wei-Meng Lee shows you how to build an infrared chat application using the IrDAClient class supported in the .NET Compact Framework class libraries.
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