RSSI BASED INDOOR POSITION MONITORING USING WSN IN A HOME AUTOMATION APPLICATION

Wireless Sensor Network (WSN) technology has become the key technology to all innovative and novel wireless applications because of its low cost and deployment simplicity. This paper presents a low cost ZigBee based WSN implementation for indoor position monitoring in a home automation application. The real-time knowledge of the location of personnel, assets, and portable instruments can increase home automation control efficiency. Position monitoring otherwise called as location estimation is the process of obtaining location information of a node with respect to a set of known reference positions. Different radio propagation models and localization techniques are discussed. Low cost Digi XBee PRO modules are deployed for location estimation using trilateration method inside a home and mean displacement error value is reported for the same. The application programs have been developed in python language using simple AT commands. The hardware and software framework and related programming are discussed in this paper.