LD2410C 24GHz Human Presence Sensor | mmWave Radar | Detects Motion & Presence up to 5 m Range | UART, GPIO, BLE

The LD2410C is a highly sensitive 24 GHz FMCW millimeter-wave radar for reliable indoor presence and motion detection. Unlike traditional PIR sensors, it detects not only movement but also stationary, seated, or lying persons (micro-movements).

Highlights

• Presence detection without movement – also detects resting persons
• Up to 5 m range & ±60° detection angle
• 0.75 m distance resolution – enables zone-based detection
• Independent of light & temperature – reliable day and night
• UART & GPIO – easy integration into smart home & IoT systems
• Configuration via Bluetooth app or serial interface

Typical Applications

• Smart home lighting control & presence automation
• Home Assistant / ESPHome / OpenHAB integrations
• Energy saving: lighting, displays, HVAC, device standby
• Security and monitoring solutions
• DIY, maker & IoT projects (ESP32, Arduino, etc.)

Technical Specifications

• Radar frequency: 24.0–24.25 GHz
• Technology: FMCW
• Range: up to 5 m (adjustable)
• Detection angle: ±60°
• Distance resolution: 0.75 m
• Supply voltage: 5 V DC (recommended)
• Current consumption: approx. 79 mA (typ.)
• Interfaces: UART + GPIO (3.3 V logic level)
• UART standard: 256000 baud, 8N1
• Dimensions: approx. 16 × 22 mm

Connections (Pinout)

• VCC: 5–12 V (recommended 5 V)
• GND: Ground
• OUT: Status output (High = person detected, Low = no person)
• UART_TX: Serial TX
• UART_RX: Serial RX

Installation Notes

• Designed for indoor use; ideal for ceiling or wall mounting
• Do not use metal covers (radar shielding)
• Moving objects (e.g. curtains, fans, large plants) may affect detection