A Wireless Sensor Network (WSN) is a network of hundreds or thousands of autonomous, low power and compact devices called sensor nodes (Fig.1) with wireless communication capability. Each sensor node is composed of a power unit, a processing unit, a memory storage unit, a communication unit and sensors. All the sensor nodes are configured in order to adapt the architecture of the network according to the application targeted. Furthermore, the primary function of the WSN is to monitor and then report a change in a physical condition like temperature or pressure behaviour for systems or goods. Consecutively, it is very important to have reliable and relevant information to base analysis on and trigger off actuators. This implies a smart reliable network and then its maintenance.
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