Build A Low Power SMS Based Vehicle Tracking System with A9G GSM+GPS Module and Arduino

The Low Power SMS Based Vehicle Tracking System operates by interfacing an Arduino Pro Mini microcontroller with an A9G GSM+GPS module to determine and transmit geographical coordinates. The A9G module integrates both cellular communication and GPS positioning, allowing it to lock onto GPS satellite signals and acquire real-time latitude and longitude data. The Arduino Pro Mini communicates with this module via serial communication, utilizing the SoftwareSerial library to parse the incoming NMEA sentences using the TinyGPSPlus library. When a location update is triggered, the Arduino formats the extracted coordinate data into a standard text message payload. It then sends AT commands to the A9G module's onboard GSM modem, instructing it to transmit this SMS to a pre-configured mobile phone number over cellular networks. Power management is handled through an 18650 lithium battery secured in a battery holder, which provides the necessary DC supply to the perfboard-mounted circuit housed within a custom sun-board enclosure. Programming and debugging during development are facilitated using an FTDI USB to serial converter connected to the Arduino Pro Mini.