Description
The TWTOF240UI is a compact Time-of-Flight (ToF) laser ranging module designed for mid-range distance measurement in smart home devices, robotics, and automation systems. It uses Single Photon Avalanche Diode (SPAD) technology and calculates distance based on the time of flight of emitted laser pulses, delivering real-time measurements from 10cm to 240cm against a 90% reflectivity whiteboard target . The module outputs data through either UART or I2C/IIC interface, providing flexibility for integration with Arduino, ESP32, and other microcontroller platforms.
Operating from a 3.0V to 3.6V supply, the module is optimized for 3.3V logic systems and draws an average current of approximately 10mA, making it suitable for battery-powered and embedded applications . With a 25° field of view and a measurement frequency of 36ms, the sensor is well-suited for obstacle avoidance in mobile robots, presence detection in kiosks and ATMs, and trigger-based applications such as automatic faucets and bin overflow detection . The module comes with a pre-attached cable and uses a compact 1.25mm-pitch 6-pin connector for plug-and-play integration .
Features
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10–240cm Detection Range: Mid-range ToF sensing suitable for obstacle avoidance, presence detection, and distance thresholding .
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SPAD Technology with 940nm Laser: Uses Single Photon Avalanche Diode detection for reliable time-of-flight measurement with Class 1 eye safety .
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Dual Interface Options: Supports both UART and I2C/IIC communication, selectable based on system architecture .
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3.0–3.6V Supply Voltage: Optimized for 3.3V logic systems, eliminating level-shifting requirements for ESP32 and similar boards .
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Low Power Consumption: Average current of 10mA and average power below 35mW for embedded and battery-powered applications .
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25° Field of View: Wide enough for general obstacle detection while maintaining directional selectivity .
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1cm Resolution: Provides discrete distance steps suitable for presence and proximity detection .
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Compact 1.25mm Connector with Cable: Includes pre-attached cable for immediate connection to breadboards and custom PCBs .
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | 10–240cm (@90% reflectivity whiteboard) |
| Accuracy | 5% (@240cm, 90% reflectivity whiteboard) |
| Resolution | 1cm |
| Supply Voltage | 3.0V–3.6V DC |
| Average Current | 10mA |
| Communication Interface | UART / I2C (IIC) |
| Field of View | 25° |
| Measurement Frequency | 36ms |
| Light Source | SPAD, 940nm laser |
| Eye Safety | Class 1 (IEC 60825-1:2014) |
| Operating Temperature | -20°C to +70°C |
| Dimensions | 16 × 10 × 7.6mm |
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