LD2410C-24G mmWave Human Presence Radar Sensor Module HLK-LD2410C is a high-sensitivity 24GHz human presence status sensing module developed by Hi-Link Electronics. Its working principle is to use FMCW frequency-modulated continuous wave, to detect human targets in the set space, combined with radar signal processing, accurate human body induction algorithm, to achieve high sensitive human presence status sensing, which can identify the human body in motion and stationary state, and can calculate auxiliary information such as the distance to the target. 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. Farthest sensing distance up to 5 meters, distance resolution 0.75m. 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. Support GPIO and UART output, plug and play, and can be flexibly applied to different smart scenarios and terminal products. Product Features and Benefits Module Features Plug and play, easy assembly The longest sensing distance is up to 6 meters Large detection angle, coverage up to ±60 degrees Accurate identification within the interval, support the division of the sensing range, and shield the interference outside the interval Multi-level intelligent parameter adjustment can be realized through Bluetooth or serial port to meet the needs of scene changes Visual debugging and configuration tools Small and simplified, the minimum size is only 16*22mm Supports various installation methods such as ceiling hanging and wall hanging 24GHz ISM band, compliant with FCC and CE spectrum regulations 5～12V wide voltage power supply The ultimate cost-effective choice Data sheet link: Module Benefits LD2410 human body sensing module adopts 24GHz millimeter wave radar sensor technology. Compared with other solutions, it has obvious advantages in human body sensing applications: 1. In addition to being sensitive to moving human bodies, it can also sensitively sense static, micro-moving, sitting and lying human bodies that cannot be identified by traditional solutions; 2. It has good environmental adaptability, and the sensing effect is not affected by the surrounding environment such as temperature, brightness, humidity and light fluctuations; 3. It has good shell penetration and can be hidden in the shell to work without opening holes on the surface of the product, which improves the aesthetics of the product; 4. It can flexibly configure the farthest sensing distance and the sensitivity on each distance door to achieve flexible and fine personalized configuration. Application scenarios The LD2410 human body sensing module can detect and identify the human body in motion, fretting, standing, sitting and lying down. It supports multi-level parameter adjustment and can be widely used in various scenarios of AIoT. The common types are as follows Human body sensor light control It senses whether there is someone in the space, and automatically controls lights, such as lighting equipment in public places, various sensor lights, bulb lights, etc. Human body induction wake-up of advertising screen and other equipment Automatically turn on when people come, and automatically sleep when no one comes to 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 there are people around and causing personal injury Automatic detection and alarm of dangerous places to prevent people from entering specific high-risk spaces, such as high-risk places entered by personnel from coal mine blasting Smart home appliances When there is no one in the room for a long time, the TV, air conditioner and other electrical appliances are automatically turned off, saving energy and safety Intelligent security Detection and identification of people intruding, staying, etc. within the specified range Module Dimension or size for LD2410C Module size: 16mmx22mm, 5 pin holes are reserved in the hardware (the factory default does not match the pins) The pin hole diameter is 0.9mm, and the pin spacing is 2.54mm. Pin definition for LD2410C LD2410 or LD2410B size and pin definition LD2410S size and detection range LD2420 size and pin definition Installation conditions 1. Confirm the minimum installation clearance If the radar needs to be installed with a casing, the casing must have good wave-transmitting properties at 24GHz, and cannot contain metal materials or materials that have a shielding effect on electromagnetic waves. 2. Installation Environment Requirements This product needs to be installed in a suitable environment. If it is used in the following environments, the detection effect will be affected:
• There are non-human objects that are continuously moving in the sensing area, such as animals, continuously swinging curtains, large green plants facing the air outlet, etc.
• There is a large area of strong reflectors in the sensing area, and the strong reflectors will cause interference to the radar antenna.
• When installing on a wall, external interference factors such as air conditioners and electric fans at the top of the room need to be considered 3. Precautions during installation
• Try to ensure that the radar antenna is facing the area to be detected, and the surrounding area of the antenna is open and unobstructed
• To ensure that the installation position of the sensor is firm and stable, the shaking of the radar itself will affect the detection effect
• Make sure that there is no movement or vibration on the back of the radar. Due to the penetrating nature of radar waves, the back lobe of the antenna signal may detect moving objects behind the radar. Metal shielding cover or metal backplane can be used to shield the radar back lobe and reduce the influence of objects on the back of the radar
• The theoretical distance accuracy of radar can be accurate to 0.15 meters, which is the result obtained through special algorithm processing based on the physical resolution of 0.75 meters. Due to the differences in the size, state, and RCS of the target, the target distance accuracy will fluctuate; at the same time The maximum distance will also fluctuate slightly Bluetooth instructions
• Install software Currently the APP supports Android and IOS platforms, you can download it from this link: (Android) You can also go to major app stores to search for "HLKRadarTools" and install it.
• Instructions Open the app, and the app searches for nearby radar devices. The broadcast name of the device is "HLK-LD2410B_xxxx" (xxxx is the last four digits of the mac address). After the module is successfully connected, you can view the radar information, or debug and save the parameters. The use distance of the APP should not exceed the Bluetooth signal range (within 4 meters) The process of modifying the radar parameters of the Bluetooth APP is the same as that of the PC host computer tool.
• Turn on bluetooth again The Bluetooth function of LD2410C is enabled by default, and Bluetooth can be turned off or turned on through the serial port protocol (see LD2410B serial port communication protocol.pdf). If the bluetooth has been turned off, or the serial port cannot be used, the bluetooth can be turned on again after the module is powered off and then powered on for more than 5 times within 2~3s.
