Hi-Link HLK-LD2410B 24GHz mmWave Human Presence Sensor (UART + GPIO)

Description

Enhance your smart automation projects with the HLK-LD2410B — a 24GHz mmWave radar sensor capable of detecting even micro-movements like breathing, seated presence, or minimal motion.

Using FMCW radar and an advanced signal processing algorithm, it detects motion and stationary human presence across 8 configurable zones with a range up to 6 meters. It outputs both real-time UART data and a simple GPIO presence pin. A BLE-enabled version is available for wireless configuration using the official Android/iOS app or PC software.

Specifications

• Technology: FMCW 24GHz mmWave radar

• Detection Range: Presence up to 5 m, Motion up to 6–6.5 m

• Resolution: 8 detection zones (0.75 m intervals)

• Outputs: UART (3.3 V logic, 256000 baud), GPIO (presence detection)

• BLE Configuration: Available on BLE variants

• Supply Voltage: 5 V (regulated), 3.3 V logic

• Power Consumption: ~0.1 W

• Dimensions: 7 mm × 35 mm

• Angle Coverage: ±60°

• Tools: PC configuration utility, Android/iOS app (HLKRadarTools)

Use cases

• Turn lights on/off when someone enters or leaves a room

• Detect presence in a room even if the person is not moving

• Save power by putting devices to sleep when nobody’s around

• Wake up a screen or device when someone approaches

• Control fans, lights, or speakers with motion or presence

• Make your project react to someone sitting at a desk or lying in bed

• Trigger alerts or automations when someone enters a zone

• Detect people behind plastic or acrylic enclosures

• Replace PIR sensors for better accuracy and reliability indoors

• Build touchless controls for displays, doors, or gadgets

Comparison