LD2452 24GHz Radar Sensor for Human Presence & Position Detection | Multi-Target Tracking up to 3 People | 6m Range | FMCW mmWave Radar | UART | 3.3V / 5V

The LD2452 is a high-precision 24 GHz FMCW millimeter-wave radar designed for reliable detection, positioning, and tracking of people in indoor environments. It measures distance, angle, and movement and operates independently of lighting conditions—ideal for smart home systems, building automation, and IoT projects.

Highlights

• MULTI-TARGET TRACKING – detects and tracks up to 3 people simultaneously
• UP TO 6 M RANGE – reliable detection in typical indoor scenarios
• WIDE DETECTION ANGLE – ±60° horizontal and ±30° vertical (typical)
• FMCW RADAR TECHNOLOGY – precise distance and angle information, robust against light and temperature changes
• UART INTERFACE – TTL UART (RX/TX) for easy connection to MCUs, SBCs, and gateways
• 3.3 V / 5 V OPERATION – flexible power supply, ideal for embedded and IoT setups
• COMPACT FORM FACTOR – only approx. 23 × 42 mm, perfect for small enclosures

Typical Applications

• Smart home presence detection (e.g. lighting, HVAC, automations)
• Room occupancy detection / energy management
• Zone and area monitoring
• Interactive installations & human–machine interaction
• Maker and IoT projects using position data instead of simple motion detection

Technical Specifications (Excerpt)

• Frequency band: 24–24.25 GHz
• Max. range: up to 6 m
• Targets: up to 3 simultaneously
• Data rate: approx. 10 Hz
• Supply voltage: 3.3 V or 5 V
• Current consumption: typ. approx. 126 mA
• Dimensions: approx. 23 × 42 mm

Connector / Pinout (J1)

• 5V – power supply
• RX – UART RXD
• TX – UART TXD
• GND – ground

Installation Notes

• Recommended wall mounting at approx. 1.5–2.0 m height for optimal detection
• Enclosure material should be transparent to 24 GHz (no metal or shielding)
• Moving objects such as curtains, fans, or plants within the detection area may affect measurements