LD2410D 24GHz mmWave Presence Sensor with UART and GPIO, up to 10m

The HLK-LD2410D from Hi-Link detects movement, micro-movements, and nearly stationary people indoors. This compact FMCW radar module is ideal for smart home automation, intelligent lighting, room occupancy detection, and display activation.

Highlights

• 24 GHz FMCW radar for human presence detection
• Wall-mounted: Motion detection up to approx. 10 m, micro-movements up to approx. 6 m, and seated persons up to approx. 5 m
• Ceiling-mounted: Motion detection up to approx. 5 m; lying persons up to approx. 3 m, depending on their position
• Detection angle of approx. ±60°
• UART interface for configuration and data output, plus GPIO OUT for simple presence signals
• Adjustable detection range, thresholds, and delay time via the PC configuration tool
• Suitable for microcontroller projects using ESP32, Arduino, and Raspberry Pi Pico

Technical Specifications

• Model: HLK-LD2410D
• Frequency range: 24–24.25 GHz
• Supply voltage: 3.0–3.6 V or 4.5–5.5 V
• Typical operating current: Approx. 50 mA
• Interfaces: UART, GPIO OUT; UART baud rate: 115200
• Dimensions: Approx. 7 × 35 mm
• Operating temperature: -40 to +85 °C

The actual detection range depends on mounting height, orientation, enclosure material, environment, and configuration. Adjust the detection range, thresholds, and delay time to suit your application.