Indian Journal of Science and Technology

Abstract

Objectives: The proposed work is an attempt to design a security unit that can send the whereabouts of the user when an urgent situation arises. Methods/Statistical Analysis: This is done by using Global Positioning System (GPS) which determines the precise co-ordinates of the user. Microcontroller then extracts the required information and sends this location using Global System for Mobile communication (GSM) modem to a list of pre-assigned numbers when prompted by the user. Findings: The setup is portable. User can carry the device in their handbags. The triggering of the process is made wireless using RF transmitter and receiver. The GPS works continuously so that any change in the location of the user is updated constantly. Applications/Improvements: It could be used as a valuable tool in case of imperative circumstances. 
Keywords: GPS, GSM, Microcontroller, NMEA Protocol, RF Transmitter and Receiver