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A wireless sensor network is a large scale wireless network of hundreds or even thousands, number of tiny sensor nodes that are capable of sensing, communication, and computation. These networks allow measuring physical parameters such as temperature, pressure, or relative humidity and also allow coordinated signal detection, monitoring, and tracking to enable sensor nodes to simultaneously capture geographically distinct measurements. A sensor node has four basic components: a battery power source for communication; a match box size processing unit for local computation; a small sized embedded operating system with small data memory; and MEMS sensors unit for sensing the environment.
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