Goouuu Tech GT-U16 RTK L1+L5 GPS Module with Arduino - Interfacing and Parsing GNSS Data

The Goouuu Tech GT-U16 RTK L1+L5 GNSS Module serves as the core positioning sensor in this system, communicating directly with an Arduino microcontroller. The GNSS module receives multi-frequency satellite signals via its connected ceramic patch antenna or active multiband antenna to determine precise geographic coordinates, altitude, and timestamp information. It outputs this raw telemetry data as standardized NMEA sentences over a serial interface. The Arduino microcontroller reads these incoming asynchronous serial data streams using its hardware or software serial pins. Once captured, the Arduino code processes the raw string data, parsing out specific variables such as latitude, longitude, and UTC time into human-readable values. For desktop configuration and advanced performance tuning, the module can also interface directly with a PC using an optional Serial-to-USB adapter and the iNavTool software. Jumpers and wiring connect the power, ground, and data lines between the GT-U16 module and the Arduino board to complete the functional hardware loop.