The Group Management System Based on Wireless Sensor Network and Application on Android Platform

This paper presents a group management system with WSN(Wireless Sensor Network) and smart phone devices. The proposed system was comprised of personal device based on WSN. smart phone device which is used by group manager and web server. The sensor node called as personal device which is used by group members sends a data packet every 2 seconds to the manager device. The manager can check their group member's distance from him within a 30-meter radius and battery residual quantity with the manager device. Manager device sends its latitude and longitude data from GPS(Global Positioning System) and information of personal devices to web server. Therefore, other person such as group member's parents can assure their children's safety and security through the web page. The RSSI value from sensor node was converted into distance data by computed log-normal path loss model.