SparkFun Distance Sensor Breakout - RFD77402 (Qwiic)
SparkFun Distance Sensor Breakout – RFD77402 (Qwiic)
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SparkFun Distance Sensor Breakout – RFD77402 (Qwiic)

Part Number: SF-SEN-14539/03



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The SparkFun Distance Sensor Breakout utilizes the RFD77402 3D ToF (Time of Flight) sensor module from Simblee to give you the most accurate measurements at short range. The RFD77402 uses an infrared VCSEL (Vertical Cavity Surface Emitting Laser) module to measure the amount of time it takes to bounce off a target. This allows low-cost millimeter readings up to two meters! To make it even easier to use this breakout, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system. However, we still have broken out 0.1″ spaced pins in case you prefer to use a breadboard.

Thanks to the RFD77402s 850nm VCSEL and electronic driver and optical receiver sensor, this breakout is ideal for distance measurements ranging from 100mm to 2000mm, 1D gesture recognition, obstacle detection and avoidance in robotics applications, and more! The RFD77402 utilizes an I2C interface that supports a direct 8-bit addressing scheme to access the module users register set and an additional 16-bit indirect addressing scheme that is mainly used for debugging purpose or special operations.


  • Operating Voltage 3.3V
  • Current 7 mA average at 10Hz
  • Measurement Range: ~50mm to 2,000mm
  • Precision: +/-10%
  • Light Source: 850nm VCSEL
  • I2C Address: 0x4C
  • Field of View: 55°
  • Field of Illumination: 23°
  • Max Read Rate: 10Hz (Weve seen up to 20Hz in practice)
  • 2x Qwiic Connection Ports



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