LD2410 Human Presence Sensor

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Overview

The LD2410 is a millimeter-wave radar sensor for human presence detection, supporting both stationary and moving target detection. It uses UART communication and is ideal for smart home automation systems.

About LD2410 Human Presence Sensor

The LD2410 is a 24GHz millimeter-wave radar sensor designed for detecting human presence, capable of identifying both stationary and moving targets. Unlike traditional PIR sensors, the LD2410 can detect micro-movements such as breathing, making it ideal for smart lighting, HVAC control, and security systems. It provides precise zone-based detection with configurable distance gates and supports UART communication for integration with ESP32 or Home Assistant via ESPHome.

Where to Buy

Get Your LD2410

LD2410 Human Presence Sensor

Starting from

$10 per unit

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Technical Specs

LD2410 Specifications

Complete technical specification details for LD2410 Human Presence Sensor

📊 Technical Parameters

Interface UART (256000 baud)
Detection Range Up to 5 meters
Detection Field ±60°
Power Supply 5V DC
Output UART, Optional GPIO
Resolution 0.2m or 0.75m gate intervals
Operating Temperature -20°C to +85°C
Dimensions 35mm × 7mm
Pin Width 1.27mm
Pin Configuration

LD2410 Pinout

The **LD2410** is a 5-pin 24GHz mmWave radar human presence sensor:

Visual Pinout Diagram

Pinout Diagram Primary
LD2410 Human Presence Sensor pinout
5
Total Pins

Pin Types

Power
2
Communication
3

Quick Tips

🔌

**Interface**: UART (256000 baud),📡 **Technology**: 24GHz FMCW radar (Frequency Modulated Continuous Wave),👤 **Detection**: Both stationary and moving human targets

📏

**Range**: Up to 5 meters,📐 **Field of View**: ±60° detection angle,🎚️ **Gates**: Configurable distance gates (0.2m or 0.75m resolution)

**Power**: 5V DC, stable power required,📊 **Pin Spacing**: 1.27mm (compact design),🎯 **Applications**: Smart lighting, occupancy sensing, HVAC control, security systems

Pin Descriptions

Pin NameTypeDescriptionNotes
1 VCC
Power

Power input

5V DC

2 GND
Power

Ground connection

3 TX
Communication

UART transmit

Sends data from sensor (connect to ESP32 RX)

4 RX
Communication

UART receive

Receives commands (connect to ESP32 TX)

5 OUT
Communication

Digital presence output

HIGH when presence detected (optional)

Connection Guide

Wiring LD2410 to ESP32

To interface the **LD2410** with an **ESP32** for human presence detection via UART:

Visual Wiring Diagram

Wiring Diagram Recommended
LD2410 Human Presence Sensor wiring with ESP32
5
Connections

Connection Status

Required
4
Optional
1

Protocol

UART

Pin Connections

LD2410 PinConnectionESP32 PinDescription
1 VCC Required
5V

Power supply (5V)

2 GND Required
GND

Ground

3 TX Required
GPIO16 (RX2)

Sensor transmit to ESP32 receive

4 RX Required
GPIO17 (TX2)

Sensor receive from ESP32 transmit

5 OUT Optional
GPIO18

Digital presence output (optional)

💡

**UART2**: Use UART2 on ESP32 (GPIO16/17 are default UART2 pins)

📊

**Baud Rate**: 256000 bps - must match in firmware configuration

**Power**: Requires stable 5V supply (100mA typical)

🔄

**TX/RX**: Connect sensor TX to ESP32 RX, sensor RX to ESP32 TX

📡

**OUT Pin**: Optional digital output goes HIGH on presence detection

🎚️

**Configuration**: Use HLK Radar Tool or ESPHome for gate sensitivity tuning

📏

**Distance Gates**: Configurable zones for moving/stationary detection

⚠️

**Pin Spacing**: 1.27mm pitch - use adapter or careful soldering

Help & Support

LD2410 Troubleshooting

Common issues and solutions to help you get your sensor working

Common Issues

Debugging Tips

Code Examples

LD2410 Programming Examples

Ready-to-use code examples for different platforms and frameworks

Summary

Wrapping Up LD2410

The ESP32 LD2410 Human Presence Sensor is a powerful Human Presence sensor that offers excellent performance and reliability. With support for multiple development platforms including Arduino, ESP-IDF, ESPHome, PlatformIO, and MicroPython, it's a versatile choice for your IoT projects.

Best Practices

For optimal performance, ensure proper wiring and follow the recommended configuration for your chosen development platform.

Safety First

Always verify power supply requirements and pin connections before powering up your project to avoid potential damage.

Ready to Start Building?

Now that you have all the information you need, it's time to integrate the LD2410 into your ESP32 project and bring your ideas to life!

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