I want class diagram, object diagram, component diagram for vehicle tracking system

In Vehicle tracking project, you can track the location of your Vehicle. This project gives Minute-by-minute updates about vehicle location by sending sms through GSM modem. This SMS contains longitude and latitude of the location of vehicle. Microcontroller is the central processing unit CPU of our project. Microcontroller gets the coordinates from GPS modem and then it sends this information to the user in Text SMS. GSM modem is used to send this information via SMS. SMS will be sent to the owner of the vehicle.

GPS based Vehicle tracking system is required in many situations, like in case of car theft detection. Car tracking using GPS project will be useful when our car is stolen. Also if somebody wants to track school bus of their children, at that time it will be helpful to find out the location of kids. One more situation is when some company wants to track the location of the cab or transport bus of employee then in this case this vehicle tracking system will be very useful.

In GPS tracking system the location of vehicle is sent to remote place and it is done by GSM modem. Global Positioning System (GPS) modem requires minimum 3 satellites to calculate the exact location. This modem communicates only in single way with 8051 microcontroller. This means that it can only transmit data to microcontroller. GPS Modem does not receive any data from microcontroller. At the same time GPS modem does not send data to Satellite, it only receives signal from satellites.