HLK-LD2420 is a high performance 24 GHz millimeter-wave radar sensor module designed for indoor human presence and motion detection. It uses millimeter-wave distance measurement technology and the registered signal processing technology of the S3 series chip to detect movement, micro movements, and standing human presence. The module provides real time perception results in indoor environments. Key benefits - Real time detection of human movement, micro-motions, and presence with a range up to 8 meters. - Configurable detection distance and sensitivity to fit different spaces and scenarios. - Reliable indoor sensing with clear, timely perception results. - Easy integration with standard controller interfaces via GPIO and UART; plug-and-play for rapid deployment. Main features and performance - Detects human movement, micro movements, and standing presence within an indoor detection area. - Maximum detection distance for human body up to 8 meters. - Configurable perception range and sensitivity levels to adapt to varying environments. - Real time perception output for immediate decision making and actions. Interfaces and compatibility - Supported interfaces: GPIO and UART. - Plug-and-play and flexible to integrate with a wide range of smart devices and terminal products. Use scenarios - Smart lighting and energy management: automatically illuminate or dim lights based on occupancy and movement within the room, improving comfort and reducing energy use. - Indoor occupancy monitoring and security: detect presence or unusual motion in defined areas and trigger alerts or access control responses in real time. - Human-machine interaction and interactive displays: activate displays or respond to user presence as they stand or move within the sensing area, enabling touchless control and responsive experiences. Physical attributes and integration - Compact module design suitable for embedding into various smart devices and IoT products. - Robust 24 GHz radar sensing suitable for compact indoor applications, with stable performance across different movement patterns and human presence. Reliability and value - Combines advanced millimeter-wave sensing with proven S3 series processing for accurate detection results. - Provides a dependable, plug-and-play sensing solution that enhances safety, convenience, and energy efficiency in smart environments.