Waveshare TOF Mini Laser Range Sensor, UART/I2C, Up to 7.8m Range

The sensor requires a DC supply voltage between 4.3V and 5.2V. It is designed for standard 5V systems but includes headroom for stable operation with slight voltage fluctuations. For use with 3.3V logic devices, ensure proper level shifting on the communication lines (UART TX/RX or I2C SDA/SCL).

The module supports both interfaces simultaneously. The default output is via UART at 921.6Kbps. You can switch to I2C mode by sending a specific configuration command over UART or by applying a specific voltage to a configuration pin (refer to the datasheet). I2C is useful for multi-sensor networks on a shared bus, while UART provides simple point-to-point communication.

The sensor has an ultra-narrow field of view between 2° and 3°. This small cone of detection minimizes the capture of stray light and reflections from objects outside the direct measurement path. This significantly improves tolerance to high ambient light (up to 100k lux) and enhances accuracy by reducing noise, making it suitable for outdoor and brightly lit industrial environments.

Yes, it is well-suited for drone altitude holding and ceiling detection. Its range up to 7.8m and ±4cm accuracy provide stable ground distance feedback. The high light tolerance ensures reliability outdoors, and the lightweight, compact design minimizes payload impact. Ensure secure mounting with the laser pointed downward and consider vibration damping for optimal performance.

The package includes a GH1.25 4-pin cable and a breakout 'squid' cable. The standard 4-pin connector pinout is: Pin 1 (VCC: 4.3-5.2V), Pin 2 (GND), Pin 3 (SDA/ RX), and Pin 4 (SCL/ TX). The function of Pins 3 and 4 depends on the selected communication mode (I2C: SDA & SCL; UART: RX & TX). Always cross-reference with the product documentation for your specific wiring configuration.