The development of these networks was motivated by military applications such as battlefield surveillance. Modern networks are bi-directional, both collecting data and enabling control of sensor activity. WSNs monitor physical or environmental conditions, such as temperature, sound, and pressure. These are similar to wireless ad hoc networks in the sense that they rely on wireless connectivity and spontaneous formation of networks so that sensor data can be transported wirelessly. WSNs can measure environmental conditions such as temperature, sound, pollution levels, humidity and wind. Wireless sensor networks ( WSNs) refer to networks of spatially dispersed and dedicated sensors that monitor and record the physical conditions of the environment and forward the collected data to a central location. Group of spatially dispersed and dedicated sensors
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