Radar motion and presence sensor module 24GHz HLK-LD2410B
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Radar module 24GHz LD2410B with Bluetooth (Hilink)
LD2410B is a high-sensitivity 24GHz (FMCW) millimeter-wave radar module from Hilink, designed for precise human presence detection. Thanks to advanced algorithms, it can identify both moving and stationary objects (e.g., micro-movements during breathing), offering a maximum range of up to 6 meters. The device supports UART communication and a high-speed GPIO digital output, and also allows for convenient configuration of zones and sensitivity via a PC application or wirelessly via Bluetooth.
Key features:
- Operating principle based on Frequency Modulated Continuous Wave (FMCW) 24 GHz.
- Detection of movement, micro-movements, and static presence (e.g., sitting, lying down).
- Detection range up to 6 meters with the possibility of zoning (resolution 0,75 m).
- Wide detection angle with coverage up to ±60 degrees.
- Support for parameter configuration via Bluetooth and UART serial port.
- Ability to penetrate thin materials (can be hidden inside an enclosure).
- Resistance to changes in temperature, humidity, and lighting fluctuations.
- Compact module dimensions: 7 x 35 mm.
Example applications
- Smart lighting: Automatic light control in public places, offices, or at home based on the continuous presence of people.
- Protection and security: Protection against UV lamp operation in the presence of people, alarm systems in hazardous industrial zones.
- Smart Home: Intelligent management of air conditioning, TV, or heating to save energy when no one is in the room.
- Advertising screens and HMI panels: Automatic wake-up of interfaces upon detecting an approaching user.
Hardware description and pinout
The module has only 5 pins with a pitch of 1,27 mm. Powering the system requires a voltage of 5 V with a current capacity of at least 200 mA. The logic pins (IO) operate at the 3,3 V standard, which allows for easy connection with most popular microcontrollers.
- OUT: Detection status output (high state = presence detected, low state = no human).
- UART_Tx: Serial port transmit pin (TX).
- UART_Rx: Serial port receive pin (RX).
- GND: Power ground.
- VCC: Input power supply 5 V.
Configuration and calibration
The manufacturer provides dedicated PC software (Visual Configuration Tool) and a convenient mobile application that connects via the built-in Bluetooth module. They allow for real-time data visualization, easy tuning of radar sensitivity for individual distance gates, and precise setting of the hold time after movement ceases. To communicate with a PC, use a USB-UART converter (default baudrate is 256000 bps).
Technical specification
- Supply voltage: 5 V DC (power supply >200 mA required)
- Average current consumption: 79 mA
- Interface logic level (IO): 3,3 V
- Operating frequency: 24 GHz ~ 24,25 GHz (ISM band)
- Modulation type: FMCW
- Hardware interfaces: 1x GPIO (OUT), 1x UART
- Detection range: from 0,75 m to 6 m (configurable)
- Detection angle: ±60°
- Measurement resolution: 0,75 m
- Sweep bandwidth: 250 MHz
- Operating temperature: -40°C ~ 85°C
- Dimensions: 7 x 35 mm
Kit contents
- Radar module 24GHz HLK-2410B - 1 pcs.
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