The HLK-LD2402 is a cost-effective 24GHz human presence sensing module developed by Hi-Link. Designed for indoor scenarios, it combines a highly integrated AIoT millimeter-wave radar SoC with intelligent human-body micro-motion detection algorithms. This module enables precise recognition of human presence, motion, and micro-movements in real time.
With a detection range of up to 10 meters for motion and 5 meters for static presence, the HLK-LD2402 offers high sensitivity, wide coverage, and robust environmental adaptability. Supporting both GPIO and UART interfaces, it is plug-and-play and can be flexibly applied in various smart home, industrial, and security applications.
Key Features
Integrated 24GHz intelligent millimeter-wave radar SoC with advanced signal processing firmware
Presence detection within 5m, motion detection within 10m
Wide detection angle: up to ±60° coverage
Supports automatic threshold generation, reducing manual calibration and simplifying installation
Independent configuration of trigger and hold thresholds for flexible application
Strong anti-interference capability, shielding detection outside defined zones
Visual debugging and configuration tools for easy setup
Multiple installation options: ceiling mount, wall mount, or embedded
Operates in the 24GHz ISM band, compliant with FCC and CE spectrum regulations
Compact and cost-effective solution for AIoT applications
Specifications
Frequency: 24.0–24.25 GHz
Modulation Mode: FMCW
Detection Distance:
Detection Angle: ±60° adjustable
Power Supply: 3.3V (>200mA)
Average Current: ~50mA
Sweep Bandwidth: 250MHz (CE/FCC compliant)
Operating Temperature: -40℃ to +85℃
Dimensions: 20×20mm (stamp hole package with pin header)
Data Format: UART ASCII output / 3.3V high-low level output
Interfaces: GPIO and UART
Applications
Smart lighting control (automatic on/off with presence detection)
Smart home appliances (energy-saving automation for AC, TVs, etc.)
Security systems (intrusion detection, occupancy monitoring)
Public display activation (advertising screens, kiosks)
Life safety protection (hazardous area monitoring, UV lamp safety control)
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