Overview
LD2410 is a high-sensitivity 24GHz human presence status sensing module developed by Hilink Electronics. Its working principle is to use FMCW frequency-modulated continuous wave to detect human targets in the set space. This product is mainly used in indoor scenes to sense whether there is a moving or micro- moving human body in the area, and output the detection results in real time.
It provides a visual configuration tool, which can easily configure the sensing distance range and sensing in different intervals sensitivity and unmanned delay time, etc., to adapt to different specific application needs.
Combined with radar signal processing and accurate human body sensing algorithms, it realizes high-sensitivity human presence status sensing, and can identify human body in motion and stationary states, and auxiliary information such as the distance of the target can be calculated.
It supports GPIO and UART output, plug and play, and can be flexibly applied to different smart scenarios and terminal products.
Product Features
- Plug and play, easy assembly
- The farthest sensing distance can reach 5 meters, and the distance resolution is 0.75m
- Large detection angle, coverage up to ±60 degrees
- Accurately identify withinthe interval, supportthedivision ofthe sensing range, andshield the interferenceoutside the interval
- Multi-level intelligent parameter adjustmentto meetthe needs of scene changes
- Visual debugging and configuration tools
- Small and simplified, the minimum size is only 7mmx35mm
- Support ceiling, wall and otherinstallation methods
- 24GHz ISM band, compliant with FCC and CE spectrum regulations
- The ultimate cost-effective choice
Application scenarios
The LD2410 human body sensing module can detect and identify the human body inmotion, fretting, standing, sitting and lying down. It supports multi-level parameter adjustmentand can be widely used in various AIoT scenarios. The common types are as follows
Human body sensor light control
It senses whether there is someone in the space, and automatically controls lights, suchas lighting equipment in public places, various sensor lights, bulb lights, etc.
Human body induction wake-up of advertising screens and other devices.
Automatically turn on when people come, and automatically sleep when noonecomesto save power, information delivery is more accurate and efficient.
Life safety protection
UV lamp work protection to prevent the UV lamp from being turned on when therearepeople around and causing personal injury Automatic detection and alarmingof dangerousplaces to prevent people from entering specific high-risk spaces, such as high-riskplaceswhere coal mine blasting personnel enter.
Smart Appliances
When there is no one in the room for a long time, the TV, air conditioner andother electrical appliances are automatically turned off, saving energy and safety.
Smart Security
Detection and identification of people intruding, staying, etc. within the specifiedrange
Bluetooth Usage Instructions
1 Software Installation
Currently, the app supports both Android and iOS platforms. You can download it from this link: https://www.pgyer.com/Lq8p (Android) or search for "HLKRadarTools" in major app stores and install it.
2 Usage Instructions
Open the app and it will search for nearby radar devices. The broadcast name of the device is "HLK-LD2410B_xxxx" (xxxx represents the last four digits of the MAC address). Once connected to the module successfully, you can view radar information, debug, or save parameters.
Please note that the app's usage distance should not exceed the Bluetooth signal range (within 4 meters).
①Search Bluetooth ②View parameters ③Modify radar parameters
The process of modifying radar parameters via the Bluetooth app is consistent with the PC host tool.
3 To re-enable Bluetooth:
The Bluetooth functionality of the LD2410B is turned on by default and can be turned off via the serial port protocol (refer to LD2410B Serial Communication Protocol.pdf). Alternatively, to turn on Bluetooth, if it has been turned off or if the serial port is not available, you can re-enable it by continuously powering off and then re-energizing the module more than five times within 2~3 seconds.
Specifications
| Dimensions | 35mm(length) x 7mm(Width) |
| Interface | 1 GPIO，IO level 3.3V，1 UART |
| Power Requirements | DC 5V，Power supply capability>200mA |
| Average operating current | 80 mA |
| Detection distance | 0.75m～6m，adjustable |
| Working frequency | 24GHz~ 24.25GHz Compliant with FCC, CE, non-commission certification |
| Modulation | FMCW |
| Detection angle | ±60 ° |
| Distance resolution | 0.75m |
| Sweep Bandwidth | 250MHz Compliant with FCC, CE, non-commission certification |
| Ambient temperature | -40 ~ 85℃ |
Connector Definitions
| Pin | Symbol | Name | Function |
|---|---|---|---|
| 1 | OUT | target status output | Human presence detected: output high level No human presence: output low |
| 2 | UART_Tx | Serial Tx | Serial port Tx pin |
| 3 | UART_Rx | Serial Rx | Serial Rx pin |
| 4 | GND | power ground | power ground |
| 5 | VCC | power input | Power input 5V |
Resources
Microwave Radar Sensor Module LD2410 Manual
LD2410B serial communication protocol