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C4002 mmWave Human Presence Detection Module

SKU: SEN0691

The C4002 is a 24GHz FMCW mmWave radar module for smart homes. It detects moving/stationary humans (10×10m range), filters interference (curtains, AC), adjusts detection range, and has configurable outputs. Compatible with Arduino, ESP32, Raspberry Pi, and Home Assistant, it speeds up R&D for smart home systems (lighting, security, etc.).

Overview of Fermion: C4002 24GHz mmWave Static & Motion Human Presence Sensor
  • Docs
  • Tech Specs
  • Projects
  • Blog
    • 1. HomeAssistant Tutorial

    This tutorial allows you to integrate the C4002 millimeter-wave sensor into HomeAssistant, and view and configure sensor data in real time.
    2. Example Code for Arduino-Get All Sensor Results

    This project demonstrates how to use the DFRobot_C4002 library to retrieve all detection results from the C4002 sensor, including light intensity, target state (no target, static presence, motion), presence and motion target information (distance, energy, speed, direction), etc. Users will learn how to initialize the sensor, configure its parameters, and read various detection data.
    3. Example Code for Arduino-Auto Environment Calibration

    This project demonstrates how to use the DFRobot_C4002 library to perform environmental calibration for the C4002 sensor. Users will learn how to initialize the sensor, configure the report period, start calibration.

    Specification

    Parameter Specification
    Operating Voltage 3.6 ~ 5.5V
    Detection Capability Motion, Micro-Motion/Stationary Human Body
    Max Detection Distance Motion 11m, Micro-Motion/Stationary 10m
    Detection Angle 120° x 120°
    Output Interface OUT (Configurable IO), UART
    Operating Frequency 24GHz ~ 24.25GHz
    Light Detection 0 ~ 50 lux
    Operating Temperature -20 ~ 85 ˚C
    Product Dimensions 22mm x 26mm

    Pinout

    Pin Description
    VIN DC 3.6V-5.5V Input
    GND Ground
    RX Sensor Serial Port Receive
    TX Sensor Serial Port Transmit
    OUT Level Output

    Detection range


    C4002 Module Ceiling Mount Detection Range Diagram (Mounting Height: 2.7m)

    C4002 Module Horizontal Side Mount Detection Range Diagram (Mounting Height: 1.2m)

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