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Specification

HLK-LD2420 is a high-performance 24 GHz one-transmitter-one-receiver antenna radar module from HELINCO. Its human body sensing algorithm adopts millimeter wave radar distance measurement technology and the advanced proprietary signal processing technology of S3 series chips to realize accurate sensing of moving, micro-moving and standing human bodies.HLK-LD2420 is mainly used in indoor scenes to sense whether there is a moving or micro-moving human body in the area, and to refresh the detection results in real time. It has a maximum sensing distance of 8m to the moving human body, and can be easily configured with sensing distance range, sensing sensitivity and refresh time in different zones. It supports GPIO and UART interfaces, which is plug-and-play, and can be flexibly applied to different intelligent scenes and terminal products.

Features
1. Load the default human body sensor configuration, plug and play
2. Provide visualization tools to support the configuration of the detection distance interval, sub-interval sensitivity settings and results reported time
3. Support sensing range division, completely shielded from any interference outside the zone
4. Proximity 0.2m sensing, no detection of blind zones
5.The farthest distance of motion human body sensing is 8m.
6. Trigger and hold state independent configuration, strong anti-interference ability
7. Supports a variety of installation methods such as ceiling, wall, etc.
8.Equipped with single chip intelligent Boomerang sensor SoC and intelligent algorithm firmware.

Specification
Model: HLK-LD2420
Size: 20x20mm
Output model category: digital sensor
Working principle: magnetic sensor
Frequency: 24G-24.25GHz
Modulation mode: FMCW
Detection distance: 0.75~6m adjustable
Detection Angle:60
Power supply: 3.3V(Typ.)
Current: ~50mA .
Output Serial Level: 3.3V
Sweep bandwidth: 250MHz
Ambient Temperature: -40°C~+85°C
Data Format: Serial ASCIl Output/High/Low Level 3.3V & 0V
Package: with pin
Application Scenario: Intelligent light control/advertisement screen sensor

Precautions
1. If the radar needs to be installed in a housing, the housing must have good wave-transparent characteristics in the 24GHz band, and must not contain metal or materials that have a shielding effect on electromagnetic waves.
2. This product needs to be installed in a suitable environment, such as the following environment, the detection effect will be affected.
2.1 The presence of non-human objects in the sensing area of continuous movement, such as animals, continuous swing of the curtains and large plants facing the wind and so on.
2.2 The presence of a large area of strong reflective planes in the sensing area, strong reflective objects on the radar antenna will cause interference.
2.3 When wall-mounted, it is necessary to take into account external interference factors such as air conditioners and electric fans on the top of the room.
3. Installation precautions
3.1 Try to ensure that the radar antenna is facing the area to be detected, and the antenna around the open and unobstructed.
3.2 To ensure that the sensor installation position is firm and stable, the radar itself will affect the detection effect of shaking.
3.3 to ensure that the back of the radar will not have object movement or vibration. Because the radar wave has penetrating, antenna back flap may detect the radar back of the moving objects. Metal shield or metal back plate can be used to shield the radar back flap to reduce the impact of the back of the radar objects.
3.4 When there are more than one 24GHz band radar, please do not beam right, try to install far away from each other, in order to avoid possible mutual interference.
4. Power supply considerations, power supply input voltage of 3.0V ~ 3.6V, power supply ripple within 100 kHz without significant spectral peaks, this program is a reference design, the user needs to consider the
This program is a reference design, users need to consider the corresponding ESD and lightning surge and other electromagnetic compatibility design.

List
1 x Sensor module
1 x Connection cable (optional)
1 x Serial board (optional)

HLK-LD2420 24G mm Wave Radar Module Human Presence Sensing Module Motion Sensor