RCWL-0516 is a human body motion detector that uses doppler radar technology. Use this sensor in an area and detect the presence of a human sized moving object. When triggered the output goes HIGH for 5 seconds and then resets.

Glass does block the sensor but other materials such as wood or plastic have minimal effect.

• Voltage: 5V
• Distance: 3-4 meters
• Trigger time: 5 seconds

Connection

Arduino-->Sensor

5V-->VIN
GND-->GND
Any digital pin-->OUT

Arduino Wall-Penetrating Motion Sensor Using The RCWL-0516 Microwave Radar Module

How to Get Started with a Microwave Radar Motion Sensor