The Hi-Link LD2420 24GHz Radar Sensor Module is a compact and high-performance FMCW radar device designed for precise human presence detection in smart automation and IoT systems. Unlike traditional PIR sensors, the LD2420 can detect both moving and stationary human targets with exceptional accuracy, even through non-metallic obstacles. Featuring a sensing range of up to 8 meters (wall-mounted) and 5 meters (ceiling-mounted), it offers flexible installation for diverse indoor environments. Operating on 3.3VDC at ~50mA, this module delivers low-power yet real-time data output via UART communication and a digital HIGH/LOW output pin for quick signal triggering. With its ±60° wide sensing angle, compact 20×20mm size, and data refresh rate of 10Hz, the Hi-Link LD2420 provides reliable, responsive, and privacy-friendly human detection for automation, security, and intelligent environmental control. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
FMCW Radar Technology: Enables accurate detection of moving and stationary targets.
Wide Detection Range: Up to 8m wall-mounted and 5m ceiling-mounted.
High Accuracy: ±0.35m distance accuracy with 0.7m resolution.
Wide Field Coverage: ±60° sensing angle ensures broad detection.
Real-Time Output: 10Hz data refresh rate for immediate presence reporting.
Dual Output Options: UART communication and digital HIGH/LOW output.
Low Power Operation: Consumes only ~50mA at 3.3V.
Compact Design: Small 20×20mm form factor for easy integration.
Durable and Reliable: Operates between -40°C to +85°C for versatile environments.
FCC & CE Certified: Meets international compliance standards.
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Applications:
Smart Homes: Automate lighting, climate, and security based on presence.
Office and Retail: Optimize occupancy detection for energy management.
Healthcare and Elderly Care: Monitor human presence for safety and assistance.
Security Systems: Enhance motion sensing and anti-intrusion systems.
Industrial Automation: Detect personnel in restricted or hazardous zones.
IoT Solutions: Integrate with smart platforms for intelligent occupancy analytics.
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| General Specifications |
| Product Model | Hi-Link LD2420 |
| Frequency Band | 24 – 24.25GHz (FCC/CE Compliant) |
| Radar Type | FMCW (Frequency Modulated Continuous Wave) |
| Detection Range (Wall) | Up to 8m (6m for micro-motion) |
| Detection Range (Ceiling) | Up to 5m (4m for micro-motion) |
| Distance Accuracy | ±0.35m |
| Resolution | 0.7m |
| Sensing Angle | ±60° |
| Operating Voltage | 3.0 – 3.6V DC |
| Output Voltage | 3.3V Logic Level |
| Current Consumption | ~50mA |
| Communication Interface | UART (Default Baud Rate: 256000) |
| Data Refresh Rate | 10Hz |
| Output Type | UART + Digital HIGH/LOW |
| Pin Pitch | 2.54mm |
| Dimensions (mm) | ~20 × 20 |
| Temperature Range | -40°C to +85°C |
| Mounting Options | Wall or Ceiling |
| Applications | Human Presence Detection, IoT, Smart Devices |
| Shipment Weight | 0.0038 kg |
| Shipment Dimensions (cm) | 4 × 2 × 2 |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
Pin Description:
- OT1: UART TX pin (Transmit data)
- RX: UART RX pin (Receive data)
- OT2: Digital output pin (HIGH = Human detected, LOW = No detection)
- GND: Ground
- 3V3: Supply voltage (3.0 – 3.6VDC)
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How to Use:
Power Supply:
- Connect the 3V3 pin to a 3.0 – 3.6VDC power source and the GND pin to ground.
Communication Setup:
- Use the UART interface (TX and RX pins) to communicate with a microcontroller or computer.
- Configure the communication protocol using the default baud rate of 256000.
Digital Output Monitoring:
- Monitor the OT2 pin for HIGH/LOW signals to detect human presence without UART communication.
Installation:
- For wall-mounted applications, set the sensor at an appropriate angle for maximum detection range (up to 8 meters).
- For ceiling-mounted setups, install the sensor at a height of up to 5 meters.
Integration and Testing:
- Integrate the sensor into your system and use the provided tools and resources to calibrate and monitor performance.
Package Includes:
1 x Hi-Link LD2420 24GHz Radar Sensor Module
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