Czujnik ruchu i obecności człowieka HLK-LD2410C radar 24GHz Home Assistant

HLK-LD2410C Motion and Presence Sensor - Radar Module

HLK-LD2410C is an advanced presence sensor module based on 24 GHz radar technology. The device is designed for precise detection of motion and micro-motion indoors. The use of FMCW technology and digital signal processing enables reliable presence detection even with minimal movement - the module detects not only people in motion, but also micro-movements of stationary people (e.g. sitting or lying down). The module is an excellent choice for electronics projects, including for Arduino, ESP32, ESP8266, and Raspberry Pi.

Key Technical Features

• Detection technology: 24 GHz radar (FMCW)
• Detection range: up to 5 m (configurable with distance gates every 0.75 m; detection of both motion and micro-motion of a stationary person)
• Detection angle: ±60°
• Communication interfaces: UART and BLE
• Default UART speed: 256000 baud (8N1)
• IO output logic level: 3.3 V
• Supply voltage: 5-12 V DC
• Module dimensions: 22 x 16 mm

Example Applications

Its compact design and reliable operation make this sensor a great fit for many projects:

• Indoor smart lighting systems
• Building automation and Smart Home installations
• Contactless energy management systems (powering off empty rooms)
• Advanced Internet of Things (IoT) projects
• Discreet presence monitors in corridors and walkways

Benefits

• High sensitivity: capable of detecting very subtle movements, significantly outperforming standard PIR sensors
• Versatility: simple communication with host systems using built-in UART and BLE interfaces
• Adjustable detection range: the space in front of the sensor is divided into distance zones (every 0.75 m), and sensitivity and range can be set separately for each zone. This allows precise definition of the reaction area and elimination of false detections outside the area of interest.
• Stationary person detection: two independent detection channels recognize both people in motion and micro-movements of people sitting or lying down. This is a key advantage over classic PIR sensors, which lose track of a stationary person and prematurely switch off lighting, for example.
• Wide compatibility: seamless integration with the most popular microcontroller platforms
• Miniaturization: compact dimensions allow the module to be hidden inside target enclosures
• Reliable operation: continuous operation with low power consumption