Wireless Sensor Network

Network technologies are developing fastly with this improvements sensor has promoted.  

At first all sensor has one connection with host machine, but this method is occurs high cost, configuration management is difficult.

With wireless sensor network, sensors connected with each other and create a network this method is reduce costs and complexity.


They are autonomous devices and monitoring physical or environmental conditions such as:

  Temperature
Sound
Vibration 
Pressure
Motion

Sensor network is typically equipped with radio transceiver or other wireless communications device, a small microcontroller, an energy source, usually a battery.

The cost of sensor nodes is similarly variable, hundreds of dollars to a few cents, depending on the size, weight, energy consumption, sensitivity, speed and bandwidth.


The development of wireless sensor networks was originally for military applications such as battlefield surveillance.

However, wireless sensor networks are now used in many civilian application areas, including environment and habitat monitoring, healthcare applications, home automation, and traffic control.