HLK-LD2410S is an ultra-low-power, battery-optimized 24GHz millimeter-wave (mmWave) sensor from the Hi-Link series, specifically engineered for human presence detection. This compact module integrates high-performance radar hardware with intelligent sensing firmware to deliver high-precision detection in a tiny form factor. The LD2410S hardware features: An AIoT-enabled mmWave sensor SoC A high-performance 24GHz 1T1R antenna Integrated low-power peripheral circuitry Driven by the ICL1112 chip, its advanced detection algorithm leverages FMCW distance measurement technology, proprietary radar signal processing, and smart energy-saving control mechanisms. This combination allows for the accurate identification of moving human bodies, micro-movements, and even stationary presence with exceptional reliability. Optimized for indoor IoT environments, the sensor operates in a deep low-power mode to monitor real-time occupancy status, subtle motion and breathing cues, and provide instant status updates for automation triggers. It is the ideal choice for battery-powered smart home devices, automated offices, and energy-efficient security systems. HLK-LD2410S offers a detection range of up to 8 meters. It provides fully adjustable thresholds, real-time distance reporting, and configurable hold times, ensuring seamless integration into any smart ecosystem via GPIO or UART interfaces. Product Features Smart mmWave Sensor SoC & Firmware: Equipped with a single-chip intelligent radar SoC and optimized algorithms for stable human presence sensing. Ultra-Compact Size: Only 20mm × 20mm—perfect for space-constrained IoT terminal products. Plug & Play Ready: Pre-loaded with default configurations; simply power up and start sensing. Global 24GHz ISM Band: Operates in the license-free 24GHz band, compliant with FCC and CE regulations. Low Voltage & High Efficiency: Supports a 3.0V – 3.6V range (3.3V typical), consuming an average current of only 0.1mA at a 1Hz reporting frequency. Versatile Detection: Capable of sensing dynamic motion, static presence, and micro-movements (like breathing). Powerful Visualization Tools: Includes software support for adjusting gate distances, sensitivity levels, and disappearance delays. Precision Sensing Range Control: Supports range partitioning and interference shielding to ensure accuracy within designated zones. Zero Blind Spots: Detects targets as close as 0.2m, ideal for tight indoor placements. Extended Range & Wide Angle: Features a max motion detection of 8m and +/- 60 degree coverage, optimized for wall-mounting. IAP Online Upgrade: Supports In-Application Programming (IAP) for easy remote firmware updates and feature enhancements. Application Smart Home: Automatically manage household appliances based on real-time occupancy and distance data. Intelligent Business: Power-saving for display screens, kiosks, and smart signage by activating only when a human is nearby. Smart Security: Integration with intelligent door locks, access control systems, and electronic peepholes. Smart Lighting: Identify human location for motion-sensing public lights or ambient fixtures. Parameters Operating Frequency: 24.00 – 24.25 GHz Modulation Type: FMCW (Frequency-Modulated Continuous Wave) Detection Range: Motion detection up to 8m / Presence sensing up to 4m Detection Angle: +/- 60 degrees (Wide coverage) Power Supply: Typical 3.3V Current Consumption: Approx. 0.12mA (Ultra-low power) Output Level: 3.3V logic via Serial Port Sweep Bandwidth: 250MHz Complies with CE / FCC certification standards Max EIRP: 10dBm Data Refresh Cycle: Typical 40s, user-configurable Output Format: Serial ASCII or 3.3V/0V signaling Package Type: Default with mounting pins Packing List HLK-LD2410S 1 x LD2410S Module HLK-Test-Kit 1 x Test Kit w/o Module FAQ - Frequently Asked Questions 1. What is the main difference between LD2410S and the standard LD2410?The LD2410S is specifically optimized for ultra-low power consumption (approx. 0.1mA), making it suitable for battery-powered devices, whereas the standard LD2410 is designed for constant power applications with higher refresh rates. 2. Can this sensor detect someone who is sleeping?Yes. Thanks to its mmWave technology and micro-movement sensing, it can detect the subtle chest movements caused by breathing, allowing it to maintain a "presence" status even when a person is stationary or sleeping. 3. Does the module require a specific library for Arduino or ESP32?While it uses standard UART communication, it is recommended to use the provided Serial Protocol or existing community libraries for the LD2410 series. It also provides a GPIO output (High/Low) for simple occupied triggers. 4. Can it see through walls or glass?Millimeter waves can penetrate thin non-metallic materials like glass, plastic, and drywall. However, they are blocked by metal, water, and thick reinforced concrete. Avoid metal enclosures. 5. How do I configure the detection distance and sensitivity?You can use the HLK-LD2410S Tool (PC software) via a USB-to-TTL module to adjust range gates, sensitivity thresholds, and delay times. 6. Is it affected by pets or robotic vacuum cleaners?Significant movement from pets may trigger the sensor. You can minimize false triggers by adjusting the sensitivity thresholds and detection distance gates to ignore specific zones. Download HLK-LD2410S_TOOL_1.3.0.1 (English)HLK-LD2410S User manual-V1.2HLK-LD2410S-3DHLK-LD2410S serial communication protocol-V1.00
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