WTMotion WTGAHRS3-TTL 3-Axis AHRS GPS Module with External Antenna - TTL Serial Output, ±16g, 5-36V

The WTGAHRS3-TTL version outputs logic-level TTL serial signals (0V/3.3V or 5V), making it directly compatible with microcontrollers like Arduino, Raspberry Pi, and STM32. An RS-485 variant would use a differential serial bus standard for longer-distance, noise-immune communication in industrial networks, requiring an RS-485 transceiver for connection to a microcontroller's UART.

Connect the module's TX pin to your microcontroller's RX pin, and its RX pin to your microcontroller's TX pin. Provide a common ground and power within 5-36V DC. Configure your serial port to match one of the supported baud rates (e.g., 9600, 115200). The module streams data packets containing time, angles, acceleration, and position which can be parsed according to the provided protocol documentation.

Yes. The module utilizes a Kalman filter to fuse inertial data from the accelerometer and gyroscope. When GPS signals are lost or unavailable, it seamlessly switches to a pure inertial navigation mode, continuing to provide attitude (roll, pitch, yaw) and dead-reckoned position estimates, though positional accuracy will drift over time without GNSS correction.

The IP67 rating indicates the enclosure is completely dust-tight (IP6X) and can withstand temporary immersion in water up to 1 meter deep for 30 minutes (IPX7). This makes the sensor suitable for outdoor applications, robotics operating in damp conditions, and other environments where exposure to dust and water is a concern.

The inertial measurement data (accelerometer, gyroscope, Euler angles) is output at a high rate of 200 Hz via the serial interface. The GNSS position data updates at a standard rate of 1-10 Hz, depending on satellite reception and configuration. The fused navigation solution updates at the serial output rate.