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
SKU | UART Voltage | Zones | Presence Range | Motion Range | BLE Option |
---|---|---|---|---|---|
LD2410B | 3.3 V | 8 | up to 5 m | up to 6 m | Yes |
LD2410C | 5 V tolerant | 8 | up to 5 m | up to 6 m | Yes |
LD2420 | 3.3 V | 12 | up to 5 m | up to 8 m | No |
Manufacturer: Hi-Link |
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