ABSTRACT
Real time motion detection is of utmost importance in security and surveillance systems. This paper proposes to build such a system using ZigBee in the field of wireless sensing. A wireless sensor network is an ad-hoc network of small sensor nodes which communicate with radio frequency links, and are deployed in numbers in an environment to sense physical conditions and variables like temperature, light, pressure, humidity, sound etc. Nodes are used for collecting, storing and sharing sensed data. ZigBee is a rather upcoming technology in the field of wireless communication which works on the IEEE 802.15.4 protocol. The low cost and extremely low power consumption of the ZigBee provide a simple system that lasts longer in surveillance. The basic wireless sensor network architecture is composed of ZigBee coordinator, ZigBee router and ZigBee end device. The information from the sensor nodes in the network is sent to the coordinator, the coordinator collects sensor data, stores the data in memory, processes the data, and routes the data to appropriate node via the router. The transmission of data takes place by multi hop routing at the nodes. The Arduino platform when interfaced with ZigBee gives a robust and compact physical structure to each node.
