mmWave radar detection of person presence up to 9m

This 24 GHz radar sensor from DFRobot detects whether people are in the detection area, even when they sit still or sleep. It works with FMCW and CW modulation and separate transmit and receive antennas. The range is up to 9 m with a beam angle of 100° × 40°. The result is output via UART or as a switching signal on a pin, the detection range and delay can be set via UART. According to DFRobot, snow, haze, temperature, dust, light and noise do not disturb the detection.

Recommended Accessories:

Dupont Jumper Cable Set 20cm 60 Pieces.

Features:

Detects stationary and moving people
Range up to 9 m, adjustable detection range
Output via UART and pin IO2 (HIGH when presence is detected)
Insensitive to temperature, light, dust and noise
Small size 24 × 28 mm

Application Examples:

Controlling lighting and climate according to presence
Detecting occupancy of rooms and cubicles
Detecting presence in bedrooms or offices

Documentation:

Technical Data:

Manufacturer: DFRobot
Manufacturer SKU: SEN0395
Frequency: 24 GHz
Modulation: FMCW, CW
Supply: 3.6 V to 5 V
Operating current: 90 mA
Range: 9 m
Beam angle: 100° × 40°
Equivalent transmit power: 13 to 15 dBm according to the wiki, the product page states 9 to 12 dBm
UART: 115200 baud
Connections: TX, RX, IO1, IO2, GND, VCC and 2× NC
Operating temperature: -40 °C to 85 °C
Dimensions: 24 × 28 × 3.8 mm
Weight: 6 g