HLK-LD2410B 24GHz Radar Sensor - 6m Human Presence Detection
HLK-LD2410B 24GHz mmWave Radar Sensor — 6m Human Presence Detection Module
The HLK-LD2410B Test Kit is a 24GHz millimeter-wave radar sensor module engineered for precise human presence detection in stationary and moving states. Using advanced FMCW signal processing, it detects breathing micro-movements to confirm occupancy up to 6 meters away, making it ideal for smart building automation, energy-saving lighting controls, and intrusion alerts. Its compact design and UART interface enable quick integration into existing IoT systems.
Key Specifications
| Specification | Value |
|---|---|
| Frequency | 24 – 24.25 GHz |
| Detection Range | 0.75 – 6 meters (adjustable) |
| Detection Capability | Moving and stationary human presence |
| Supply Voltage | 5V DC (±0.25V) |
| Communication Interface | UART (3.3V TTL, 115200 baud default) |
| Dimensions | 25 × 28 mm module |
What You Can Build With This
- Occupancy-based smart lighting that turns off when a room is empty
- Intrusion alarm that triggers only when a human is present, ignoring pets
- Energy-saving HVAC control for conference rooms or hotels
- Elderly care fall and inactivity monitoring system
Compatibility
The module outputs 3.3V UART signals, making it directly compatible with 3.3V logic boards like ESP32, Raspberry Pi, and Arduino Zero. For 5V microcontrollers such as Arduino Uno, a simple logic level shifter is recommended on the RX line. It integrates seamlessly with any platform that supports serial communication and can parse the binary detection protocol.
Wiring Notes
Connect VCC to a stable 5V supply and GND to common ground. The TX pin on the sensor goes to the microcontroller’s RX, and RX to TX for configuration. Current draw peaks around 150mA during active ranging, so avoid powering from a coin cell. Keep the antenna area clear of metal objects for accurate readings.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, but a 3.3V/5V logic level converter is required on the UART lines because the LD2410B uses 3.3V logic, while Arduino Uno pins are 5V.
Can it detect a person who is sitting still or sleeping?
Yes, the LD2410B senses micro-movements like breathing, so it can detect stationary humans even if they are not making large motions.
Does the sensor work through walls or glass?
Radar signals can penetrate thin non-metallic materials like drywall or glass, but detection range and accuracy may be reduced. Solid concrete or metal barriers block the signal.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items