DFRobot 5.8GHz Microwave Radar Motion Sensor Module

This 5.8GHz radar sensor detects motion based on Doppler shift of reflected radio waves, allowing it to sense extremely subtle movements like breathing through materials. PIR sensors only detect changes in infrared radiation from large body heat movements. The radar is also unaffected by ambient temperature and light conditions.

You can use the digital I/O pin for a simple motion/no-motion signal, or connect the TX pin to a microcontroller UART RX pin for serial data output. The module operates at 5V logic and 115200 baud. Ensure your power supply provides a stable 4.5-5.5V DC.

Microwave signals can penetrate non-metallic materials like drywall, plastic, and glass to a degree, but detection range and sensitivity will be reduced. It is primarily designed for line-of-sight or through-material applications like inside enclosures. Metallic surfaces will block the signal entirely.

The maximum detection range is up to 11 meters under ideal conditions. The sensor has a wide beam angle of 120° x 120°, creating a broad conical detection zone suitable for room occupancy sensing.

Yes, sensitivity and other parameters like hold time can be configured by sending specific command sets via the UART interface. The datasheet or product wiki provides the command protocol for advanced tuning of the detection threshold.