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

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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.

Ideal for room occupancy detection, smart lighting, and energy-saving systems. Works with 3.3 V logic systems like ESP32 or STM32.

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

SKUUART VoltageZonesPresence RangeMotion RangeBLE Option
LD2410B3.3 V8up to 5 mup to 6 mYes
LD2410C5 V tolerant8up to 5 mup to 6 mYes
LD24203.3 V12up to 5 mup to 8 mNo
2.50 € 2.50 € Tax Included

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Manufacturer: Hi-Link