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This reference design is optimized for single-target scenarios. In environments where multiple targets are present, the system is engineered to prioritize and lock onto the target with the highest echo energy, ensuring reliable tracking in complex spaces.
The LD2411-S hardware features a 24GHz millimeter-wave radar chip, a high-performance 1T1R (one transmitter, one receiver) microstrip antenna, and a cost-effective MCU. The radar beam utilizes a flat beam design, providing a detection range of 20 in the E-plane and 45 in the H-plane. This directional flexibility allows users to optimize the sensor’s orientation based on specific installation requirements.
Equipped with FMCW waveform technology and advanced signal processing proprietary to the S3 series chip, the RM01 firmware delivers precise human ranging and highly sensitive detection of both motion and micro-movements (such as breathing or typing).
The LD2411-S provides real-time distance reporting and human presence detection, making it an essential component for various AIoT applications:
Step 1: Connection
Open the upper computer software and click “Refresh.” Select the correct serial port and baud rate, then click “Connect Device.” Once successful, the firmware version will be displayed.
Step 2: Parameter Setting
Click “Parameter Configuration” to open the settings interface. Users can define detection intervals and sensitivity levels. Click “Set Parameter” to upload these values to the radar module.
Step 3: Real-time Monitoring
Click “Start” to view live data. The interface displays target distance and status, alongside a 15-second distance curve for historical tracking.
Step 4: Data Logging
Click “Stop” to end the session. All test data is automatically saved in the Log folder within the software directory for later analysis.
HLK-LD2411S
HLK-Test-Kit
1. What is the difference between motion and micro-motion detection?
Motion detection identifies large movements like walking or waving, while micro-motion detection can sense very small movements, such as breathing or slight head movements, ensuring the sensor knows a person is present even if they are sitting still.
2. Can the LD2411-S distinguish between two people?
The module is designed for single-target scenarios. If multiple people are in the sensing area, the radar will prioritize and report the distance of the target with the strongest echo signal.
3. How does the flat beam design affect installation?
The flat beam (20 E-plane / 45 H-plane) means the sensor is more sensitive horizontally or vertically depending on how you rotate it. This is ideal for narrow corridors or wide-area doorway induction.
4. Is this sensor suitable for outdoor use?
Yes, the 24 GHz radar technology is highly resistant to environmental factors like temperature, light, and dust, making it effective for both indoor and outdoor induction tasks.
5. What is the minimum detection distance?
The high-precision ranging starts at 30cm. Objects closer than this may not be reported accurately due to the near-field limitations of the microstrip antenna.
6. Does it require a specific library for MCU integration?
The LD2411-S uses a standard UART communication protocol. You can read the ASCII output directly with any microcontroller (Arduino, ESP32, STM32) without needing complex proprietary libraries.
