1. Product introduction HLK-LD2410C is a high-sensitivity 24GHz human presence status sensing module developed by Hilink Electronics. Its working principle is to use FMCW frequency-modulated continuous to detect human targets in the set space, combined with radar signal processing, accurate human body induction algorithm, to achieve high sensitive human presence status sensing, which can identify the human body in motion and stationary state, and can calculate auxiliary information such as the distance to the target. This product is mainly used in indoor scenes to sense whether there is a moving or micro-moving human body in the area, and output the detection results in real time. Farthest sensing distance up to 6 meters, distance resolution 0.75m. Provides a visual configuration tool, which can easily configure the sensing distance range and sensing in different intervals sensitivity and unmanned delay time, etc., to adapt to different specific application needs. Support GPIO and UART output, plug and play, and can be flexibly applied to different smart scenarios and terminal products. 2. Product Features and Benefits 2.1 Features Plug and play, easy assembly The longest sensing distance is up to 5 meters Large detection angle, coverage up to ±60 degrees Accurate identification within the interval, support the division of the sensing range, and shield the interference outside the interval Multi-level intelligent parameter adjustment to meet the needs of scee changes Visual debugging and configuration tools Small and simplified, the minimum size is only 16mmx22mm Supports various installation methods such as ceiling hanging and wall hanging 24GHz ISM band, compliant with FCC and CE spectrum regulations 5～12V wide voltage power supply The ultimate cost-effective choice 2.2 Benefits LD2410C human body sensing module adopts 24GHz millimeter radar sensor technology. Compared with other solutions, it has obvious advantages in human body sensing applications: 1. In addition to being sensitive to moving human bodies, it can also sensitively sense static, micro-moving, sitting and lying human bodies that cannot be identified by traditional solutions; 2. It has good environmental adaptability, and the sensing effect is not affected by the surrounding environment such as temperature, brightness, humidity and light fluctuations; 3. It has good shell penetration and can be hidden in the shell to work without opening holes on the surface of the product, which improves the aesthetics of the product; 4. It can flexibly configure the farthest sensing distance and the sensitivity on each distance door to achieve flexible and fine personalized configuration. 3. Application scenarios The LD2410C human body sensing module can detect and identify the human body in motion, fretting, standing, sitting and lying down. It supports multi-level parameter adjustment and can be widely used in various scenarios of AIoT. The common types are as follows Human body sensor light control It senses whether there is someone in the space, and automatically controls lights, such as lighting equipment in public places, various sensor lights, bulb lights, etc. Human body induction wake-up of advertising screen and other equipment Automatically turn on when people come, and automatically sleep when no one comes to save power, information delivery is more accurate and efficient Life safety protection UV lamp work protection, to prevent the UV lamp from being turned on when there are people around and causing personal injury Automatic detection and alarm of dangerous places to prevent people from entering specific high-risk spaces, such as high-risk places entered by personnel from coal mine blasting Smart home appliances When there is no one in the room for a long time, the TV, air conditioner and other electrical appliances are automatically turned off, saving energy and safety Intelligent security Detection and identification of people intruding, staying, etc. within the specified range 4. Hardware Description 4.1 Features Module size: 7mmx35mm, 5 pin holes are reserved in the hardware (the factory default does not match the pins) The pin hole diameter is 0.6mm, and the pin spacing is 2.54mm. 4.2 Pin definition package 1*LD2410C board