Wireless Sensor Networks

A Wireless Sensor Network (WSN) is a category Network. As the name suggests, the nodes are capable of sensing. Sensing is a physical phenomenon that occurs around them. Sensor nodes of WSN can sense humidity, pressure, temperature, light, sound, vibration, color, etc. Sensor nodes have one main component called a sensor, and these sensor nodes collectively make a network known as WSN. WSN is one of the very popular networks due to diverse types of applications, such as tracking objects, healthcare, agriculture, space applications, and so on. WSN is a key formation of the Internet of Things (IoT). IoT and WSN have been very important components for building smart cities in recent years in our country as well as across the globe. In this chapter, the need for WSN, the building block of WSN, the next design of WSN, the application of WSN, etc., are discussed.