Smart GPS Tracker Using Arduino - Circuit and Code

This smart GPS tracker project integrates several hardware modules controlled by an Arduino Nano to capture and transmit real-time location data. At the core of the system, the GPS module continuously receives signals from navigation satellites to calculate precise geographic coordinates, including latitude and longitude. The Arduino Nano reads this spatial data via serial communication, utilizing the TinyGPS++ software library to parse the raw satellite data into usable variables. Concurrently, an OLED display is wired to the Arduino to provide a local, visual read-out of the system's status and coordinates. To transmit this location remotely, the system employs a SIM800L 2G module equipped with a physical SIM card. Using the FONA library, the Arduino instructs the SIM800L module to interface with cellular networks and dispatch the parsed GPS coordinates via SMS text messages. Power management is handled by appropriate supplies, including a small 3V battery, while standard wiring securely interconnects the power, ground, and data pins across the Arduino Nano, GPS unit, cellular module, and display.