DFRobot Gravity: mmWave C4001 24GHz Human Presence Detection Sensor (12 Meters, I2C & UART)


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SKU: R110735
  1. Operating Voltage: 3.3V
  2. Maximum Detection Range: 12m
  3. Beam Angle: 100*80°
  4. Modulation Mode: FMCW
  5. Operating Frequency: 24GHz
  6. Operating Temperature: -40~85℃
  7. Baud Rate: 9600
  8. I2C Address: 0x2A


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Brand: DF Robot
Category: PIR / IR and Optical Sensor

The Gravity: C4001 millimeter-wave presence sensor, operating at a wavelength signal of 24GHz, boasts a horizontal detection range of 100°, a presence detection range of 8 meters, and a motion detection and ranging range of 12 meters. It utilizes the Gravity interface (PH2.0) and supports I2C and UART communication methods, compatible with Arduino, Raspberry Pi, ESP32 / ESP8266 development boards. Perfect for human presence detection, environmental monitoring, and real-time monitoring projects


  1. Human Detection
  2. Distance and Velocity Detection
  3. Environmental Monitoring
  4. Industrial Automation
  5. Real-time Monitoring and Tracking


  1. Communication Methods: It supports two communication methods, I2C and UART.
  2. Interface: It uses the Gravity interface (PH2.0).
  3. Human Detection: It can detect the presence of humans up to 8 meters and detect human motion up to 12 meters.
  4. Distance Detection: It can measure distances from 1.2m to 12m.
  5. Speed Detection: It can detect speeds from 0.1m/s to 10m/s.
  6. Strong anti-interference capability: It is not affected by factors such as snow, haze, temperature, humidity, dust, light, and noise.
  7. Compact size and easy integration.

Package Includes:

1 x Gravity: mmWave 24GHz Human Presence Detection Sensor (12 Meters, I2C & UART)

1 x Gravity-4P I2C/UART Sensor Connector

SKU: R110735 Category:
Operating Voltage (V)


Detection range


Modulation Mode


Operating Frequency Max


Operating Temperature (°C)


Baud Rate


I2C Address


Length (mm):


Width (mm):


Shipping Weight 0.015 kg
Shipping Dimensions 6 × 6 × 3 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China