A wireless sensor network (WSN) is a set of spatially located sensors that are widespread and has a specific objective of monitoring and compiling the physical condition that is happening in the environment. They collect and organize data at a central location. Wireless sensor networks are most commonly used in environmental conditions like pressure, humidity, temperature, pollution level: sound and direction.
Wireless sensor networks (WSN) were initially designed to promote military operations, but due to their significant advantages, they have been expanded to health, transportation and many consumer services. There are numerous sensor nodes available at WSN. The components like microcontrollers, radio transceiver, antennas, interface electronics, batteries and conventional energy sources are some of the examples of Sensor nodes.
The size of the sensor node is as small as a grain of the dust, and it can range up to the size of the shoe box. Based on the size the price may also vary from a small number of pennies to huge dollars. This is not only based on the size but also the functionalities like if the feature with high speed, energy consumption, memory, bandwidth