GPS based tracking system
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The document discusses interfacing a GPS modem with an Arduino Uno board to display location information on a 2x16 LCD. The GPS modem receives satellite signals, decodes them, and sends data like latitude and longitude in string format using the NMEA standard over serial. The Arduino program filters the NMEA data received and displays the location on the LCD.
GPS based tracking system
- 1. GPS Modem interfacing with Arduino UNO
- 2. Project Overview Arduino UNO Board 2x16 LCD GPS Modem
- 3. GPS Modem GPS Receiver receives the information in string format, transmitted by Satellites and uses this information to calculate different parameters between it and satellites. With information from satellites, a GPS receiver can fix its location on the ground from the known position of the satellites. The GPS modem has an antenna which receives the satellite signals and transfers them to the modem. The modem in turn converts the data into useful information and sends the output in serial RS232 logic level format. The information about latitude, longitude etc is sent continuously and accompanied by an identifier string.
- 4. NMEA Data Format GPS receiver communication is defined within this specification. Most computer programs that provide real time position information understand and expect data to Each sentence begins with a '$' and ends with a carriage return/line feed sequence and can be no longer than 80 characters of visible text. The data is contained within this single line with data items separated by commas. The data itself is just ASCII text and may extend over multiple sentences in certain specialized instances but is normally fully contained in one variable length sentence.
- 5. GPS Modem Output Sentences
- 8. Working of the System For displaying the location over LCD, the GPS modem and the 2x16 LCD is attached with Arduino UNO board. The GPS modem receives signals from satellites, decodes the signals and send the data in ASCII string format in NMEA standard over the serial port of the microcontroller. The microcontroller is programmed to filter the data received through its serial port according to NMEA standard and displaying the desired data over the LCD attached to it.