LDRobot STU-22L Ultrasonic Material Detection Sensor - UART/IO Interface

The provided specifications do not list an operating voltage. Typically, similar LDRobot ultrasonic modules operate at 3.3V or 5V DC. You must consult the official product datasheet or wiring diagram for the exact voltage requirements and pinout before connecting to your power supply to prevent damage.

The STU-22L provides a UART (Serial) interface. You will need to connect the sensor's TX and RX pins to your microcontroller's corresponding RX and TX pins. Communication parameters (baud rate, data bits, parity) are typically defined in the product's protocol documentation, which must be referenced for proper command structure and data parsing.

Yes, the STU-22L is designed for material differentiation. It uses ultrasonic reflectance characteristics to distinguish between materials like metal, plastic, and wood within its 2-6 cm range. The specific output for material type (e.g., a digital code or serial string) will be detailed in the sensor's communication protocol.

The 'IO' interface refers to a configurable digital Input/Output mode. In this mode, the sensor can output a simple digital signal (e.g., a high/low logic level) to indicate a condition like material detection or a threshold distance breach, simplifying integration with basic digital logic or PLCs without requiring serial communication.