DFRobot Fermion VL6180X ToF Distance Ranging Sensor (Breakout) with Header

Overview

The module is based on the VL6180X time-of-flight proximity sensor IC, an optical distance and ambient light sensor.

• Measures:

  • Distance (proximity)

  • Ambient light (lux)

   

• Uses Time-of-Flight (ToF) laser technology

• Designed for short-range, high-precision measurements

It is a compact, integrated optical sensing solution.

Working Principle

1. Time-of-Flight Distance Measurement

• Emits infrared laser pulses

• Light reflects from object and returns to sensor

• Measures time delay of return signal

Distance is calculated using:

Distance=c't2\text{Distance} = \frac{c \times t}{2}Distance=2c> independent of object reflectivity (within limits).

2. Ambient Light Sensing

• Uses an internal photodiode

• Measures visible light intensity (lux)

Enables dual functionality:

• Distance + light sensing in one device

Measurement Characteristics

Distance (Proximity)

• Range: ~0 mm to 100 mm (10 cm)

• Resolution: 1 mm

• Accuracy: high within short range

Ambient Light

• Range: ~0.1 lux to 1000+ lux

• Output: digital lux value

Optimized for very short-distance precision sensing.

Electrical Characteristics

• Supply voltage: 2.6V to 3.6V

• Low power consumption

• Designed for embedded and pCommunication Interface

  • Interface: I2C (two-wire digital communication)

  • Default I2C address: 0x29

   

  Supports configuration and data reading via registers.

  Internal Features

  Integrated Laser Emitter (VCSEL)

  • Uses Vertical-Cavity Surface-Emitting Laser (VCSEL)

  • Provides:

    • Narrow beam

    • Stable optical output

     

   

  Built-in Timing Engine

  • Handles:

    • Pulse generation

    • Return signal timing

     

  • Ensures precise ToF measurement

   

  Internal Signal Processing

  • Filters noise and ambient interference

  • Outputs stable distance values

   

  Interrupt System

  • Can trigger interrupt when:

    • Object is t exceeds limit

     

  Operating Behavior

  Distance Measurement

  • Works best in:

    • Short range (010 cm)

     

  • Provides consistent output regardless of surface color (to some extent)

   

  Surface Dependency

  • Accuracy influenced by:

    • Reflectivity

    • Angle of surface

     

  Ambient Light Resistance

  • Designed to work under:

    • Indoor lighting

    • Moderate outdoor light

     

  Environmental Characteristics

  • Operating temperature: 20C to +70C

  • Stable under normal environmental conditions

   

  Breakout Board Characteristics (Fermion Series)

  • Comes with header pins for easy connection

  • li

  • I2C interface access

   

• Compact design for embedded systems

Limitations

• Short range only (max ~10 cm)

• Performance decreases:

  • Under very strong sunlight

  • With transparent or highly absorbent objects

   

• Cannot measure:

  • Long distances

  • Object shape or size

   

Functional Role

The module acts as a:

• Short-range distance sensor

• Proximity detector

• Ambient light sensor (secondary function)

Summary

The DFRobot Fermion VL6180X breakout is a compact, high-precision optical sensor that:

• Uses ToF laser technology for distance measurement

•  

• Provides ambient light sensing capability

• Outputs digital data via I2C

• Is optimized for short-range proximity and gesture detection systems

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