6m 24GHz mmWave Person Presence Sensor LD2410

This 24 GHz radar module from DFRobot with the LD2410 detects people in a room, even when they sit or lie still. The FMCW radar detects movements and fine movements such as breathing up to 6 m and outputs the distance to the target in steps of 0.75 m. Temperature, brightness and humidity do not affect the detection, and the radar also works behind a plastic cover without an opening. The OUT pin signals presence directly with 3.3 V; distance ranges, sensitivity and hold time can be set via UART.

Note: The connection cables can be converted to male pins with Dupont cables M-M, so that they also fit an Arduino UNO.

Recommended Accessories:

Dupont Cables M-M 10cm 20 Pieces

Features:

24 GHz FMCW radar LD2410 for moving and stationary people
Detection 0.75 to 6 m, resolution 0.75 m, measured blind zone 30 cm
Detection angle ±60°
UART and GPIO outputs (high when present), 3.3 V level
Distance ranges, sensitivity per range and hold time adjustable via UART
Supply 5 to 12 V
Narrow 7 × 35 mm board

Application Examples:

Lighting that does not switch off when people are still
Waking advertising and information screens on approach
Controlling UV lamps depending on presence
Room monitoring and smart home

Documentation:

Technical Data:

Manufacturer: DFRobot
Manufacturer SKU: SEN0557
Radar module: LD2410
Frequency: 24 to 24.25 GHz
Modulation: FMCW, sweep bandwidth 250 MHz
Supply: 5 to 12 V DC (nominal 5 V)
Operating current: 80 mA average
Detection range: 0.75 to 6 m
Resolution: 0.75 m
Detection angle: ±60°
Interface: UART and GPIO, 3.3 V level
Baud rate: 57600 by default according to DFRobot, the wiki names 256000 as the best setting
Wiring: blue OUT, green TX, yellow RX, black GND, red VCC
Connector: SH 1.27 mm, cable to Dupont female 2.54 mm
Ambient temperature: -40 to 85 °C
Dimensions: 7 × 35 mm