Human presence sensor radar module 24GHz FMCW HLK-LD2412 Hi-Link
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Human presence sensor radar 24GHz FMCW - HLK-LD2412
HLK-LD2412 is a highly sensitive human presence detection module manufactured by Hi-Link, utilizing 24GHz FMCW radar technology. It allows for precise detection of both movement and micro-movements at a distance of up to 9 meters with a measurement resolution of 0,75 m. Thanks to support for UART and GPIO interfaces and the ability to be powered by 5V or 3.3V, this module is an ideal, plug-and-play solution for Smart Home systems, intelligent lighting, and IoT security.
Key features:
- 24GHz FMCW radar technology for precise tracking of movement and static states.
- Maximum detection range up to 9 meters (with configurable distance).
- Wide detection angle reaching ±75 degrees.
- Compliance with FCC and CE spectrum regulations.
- Visual tools for debugging and seamless configuration.
- Support for output interfaces: GPIO (3.3V level) and UART (default baudrate 115200).
- High sensitivity thanks to an intelligent parameter adjustment algorithm.
- Compact size and support for ceiling and wall mounting.
Application examples
The HLK-LD2412 sensor will find wide application in automation and Internet of Things (AIoT) related applications. The most popular scenarios include:
- Lighting control: Automatic switching on of lights in public buildings, corridors, and homes when a person enters the zone.
- Interactive screens and advertising: Waking up advertising panels from standby mode only when a viewer is present in front of the screen, which reduces energy consumption.
- Health and safety: Disconnecting UV radiation systems or industrial equipment when a human appears within the radar's range.
- Smart home appliances: Automatic switching off of the TV, air conditioner, and other devices after a long absence of household members in the room.
- Alarm systems: Detection of intruders, presence, and movement in secured zones.
Outputs and configuration
The module outputs the detected target status directly via the IO pin (by default, a high state indicates human presence). Additionally, auxiliary data such as distance is transmitted via UART, allowing the user to freely adjust the device's response to application guidelines. For proper operation, the power supply must offer a current capacity higher than 200mA.
Module dimensions
Installation methods and detection area
The device can be mounted in an optimal way for a given space to cover the entire target operating area with the signal.
Ceiling installation diagram:
Technical specification
- Operating frequency: 24GHz ~ 24.25GHz (ISM)
- Modulation: FMCW
- Detection range: 0.75 m to 9 m (adjustable)
- Detection angle: ±75°
- Distance measurement resolution: 0.75 m
- Sweep bandwidth: 250MHz
- Supply voltage: DC 5V or DC 3.3V
- Required power supply capacity: > 200mA
- Average current consumption: 90mA
- Interfaces: 1x GPIO (logic level 3.3V), 1x UART
- Operating temperature: -40°C to 85°C
- Dimensions: 11 mm x 28 mm
Kit contents
- HLK-LD2412 human presence sensor module
Shipping costs
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