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Radar Sensor Module 3.3V – Low Power HLK-LD2410S

HLK‑LD2410S 24 GHz Radar Presence Sensor Module – 3.3 V, Low Power

Overview

The HLK-LD2410S is a compact millimeter-wave radar sensor designed for ultra-low power human presence detection. It uses 24 GHz FMCW radar and onboard algorithms to sense motion and micro-movements (e.g., breathing) at distances up to 8 m, all while drawing minimal current (~0.1–0.45 mA depending on update rate)

Key Features

  • Plug-and-play device with I²C ultralow current modes

  • Detects static and moving people—reacts to micro-movements like breathing 

  • Sensing range: up to 8 m; angle coverage ±60° when wall-mounted 

  • Built‑in FMCW radar + digital algorithm in a ~20 × 20 mm PCB

  • Interfaces: GPIO pulse output or UART serial

  • Low-power operation suitable for battery-powered or IoT applications

Technical Specifications

ParameterValue
Operating Frequency24–24.25 GHz ISM
Supply Voltage3.0–3.6 V (typical 3.3 V)
Average Current~0.1 mA @ 1 Hz refresh; ~0.45 mA @ max rate
Power ConsumptionUltra-low
Detection Range0.2 m (min) – 8 m (max)
Angular Coverage±60° (wall-mounted)
Output ModesGPIO (motion/no-motion) or serial UART
Dimensions~20 × 20 mm PCB

Wiring (3.3 V or 5 V MCU)

  • VCC → 3.3 V regulated supply

  • GND → Ground

  • GPIO → Input for motion detection pulse

  • UART Tx/Rx → Optional data mode (requires serial connection)

Use visual configuration tool (available from manufacturer) to adjust sensing zones, thresholds, and hold time.

Applications

  • Smart lighting and HVAC presence sensing

  • Security and occupancy detection

  • Energy-saving human detection switches

  • Wearable or portable battery-powered sensors

  • Advanced automation with precise micro-movement sensing

Resources

430.00 LE 430.00 LE

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