RCWL0516 Microwave Motion Sensor Module for contactless motion detection and automation Overview The RCWL0516 is a sensitivity Doppler radar motion sensor module designed for reliable, contactless detection. It detects human movement through nonmetallic surfaces such as plastic, glass, and wood, offering more accurate detection with fewer false triggers than traditional PIR sensors. The module runs on low voltage and integrates easily with common microcontrollers. Key benefits why you need it Accurate motion detection that reduces false alarms compared to PIR sensors, improving reliability for security and automation. Contactless sensing through nonmetallic surfaces enables concealed or discreet installations without exposing the sensor. Low power operation makes it suitable for batterypowered systems and longterm installations. Broad compatibility simplifies integration into existing projects and prototypes. Features and specifications Model: RCWL0516 Sensing method: Doppler radar Detection range: approximately 3 to 7 meters Detection pattern: wide angle coverage for area monitoring Operating voltage: 3.3 V to 5 V, low power consumption Surface penetration: detects through plastic, glass, and wood; will not penetrate metal enclosures Integration: compatible with Arduino, Raspberry Pi, ESP32, and most other microcontrollers Form factor: compact module suitable for concealed or embedded mounting How it solves common problems Reduces false triggers caused by ambient temperature changes or environmental factors that affect PIR sensors. Enables hidden or protected installations where visual exposure of the sensor is not desired, such as behind panels or inside housings made of plastic, glass, or wood. Conserves battery life in portable or remote deployments thanks to low voltage operation. Typical applications Perimeter and indoor security sensors for motiontriggered alarms and monitoring Automatic lighting control in corridors, stairwells, or display cases where detection through a cover is required Presence and occupancy detection for energy management, access control, or interactive exhibits Integration into robotics and smart devices for movement detection without direct line of sight Integration tips Use a 3.3 V to 5 V supply and levelappropriate input pins on microcontrollers. Place the module behind nonmetallic panels for concealed installations; avoid metal barriers that block microwave signals. Tune sensitivity and placement to balance detection range and false trigger reduction for the target environment. The RCWL0516 provides a compact, lowpower Doppler radar solution for projects that require reliable, contactless motion sensing through nonmetallic surfaces and easy integration with common development platforms.