1. ആമുഖം
The HLK-LD2402 is a static human life sensor designed for precise detection of human presence, including motion and micro-motion. This module integrates a highly simplified 24 GHz sensor hardware with intelligent algorithm firmware. It features an AIoT millimeter wave sensor, high-performance 24 GHz transmitting and receiving antenna, and essential peripheral circuits. The human presence sensing algorithm utilizes millimeter-wave radar distance measurement technology and advanced proprietary radar signal processing to accurately perceive and report human presence in real-time within indoor environments.
2 പ്രധാന സവിശേഷതകൾ
- Equipped with a single-chip intelligent millimeter wave sensor SoC and intelligent algorithm firmware.
- Ultra-small sensor size: 20 mm x 20 mm.
- Load the default human body sensing configuration, enabling plug-and-play functionality.
- Operates in the 24 GHz ISM band, compliant with FCC, CE, and Committee-free spectrum regulations.
- Flexible power supply: 3.3 V, 5V, supporting a wide voltage range of 3.0 V ~ 3.6 V and 4.5 V ~ 5.5 V.
- Low average working current: 50 mA.
- Detects moving, fretting, and the presence of human bodies.
- Reports detection results in real-time.
- Maximum detection distance for human motion induction is 10 meters.
- Wide detection angle, covering up to 60 degrees.
- Supports various installation methods, including ceiling and wall mounting.
- Independently configurable trigger and hold states, offering strong anti-interference capabilities.
3 സാങ്കേതിക സവിശേഷതകൾ
| പരാമീറ്റർ | മൂല്യം |
|---|---|
| മോഡൽ നമ്പർ | HLK-LD2402 |
| ബ്രാൻഡ് നാമം | bibikoo (Hi-Link) |
| ഉത്ഭവം | മെയിൻലാൻഡ് ചൈന |
| ഓപ്പറേറ്റിംഗ് ഫ്രീക്വൻസി ബാൻഡ് | 24-24.25GHz |
| പരമാവധി സ്വീപ്പ് ബാൻഡ്വിഡ്ത്ത് | 0.25GHz |
| സപ്ലൈ വോളിയംtage | 3.0V-3.6V (also 4.5V-5.5V wide range) |
| വലിപ്പം | 20 മിമി x 20 മിമി |
| കണ്ടെത്തൽ കൃത്യത | ±0.15മി |
| ശരാശരി പ്രവർത്തന കറന്റ് | 50 എം.എ |
| Data Refresh Cycle | 165 എം.എസ് |
| ആശയവിനിമയ രീതി | TTL Serial Communication |
| ക്യാമറ സജ്ജീകരിച്ചിരിക്കുന്നു | ഇല്ല |
| അനുയോജ്യത | മറ്റുള്ളവ |
| പവർ ട്രാൻസ്മിറ്റിംഗ് | 13 ദി ബി എം |
| കണ്ടെത്തൽ ദൂരം | 6m (adjustable) |
| കണ്ടെത്തൽ ആംഗിൾ | ±60° |
| ഔട്ട്പുട്ട് തരം | Serial protocol / High and low levels |
| ഉൽപ്പന്ന അളവുകൾ | 20*20 മി.മീ |
| പ്രവർത്തന താപനില | -40℃ ~ 85℃ |
4. സജ്ജീകരണവും കണക്ഷനും
The HLK-LD2402 module is designed for straightforward integration. It features five pin holes (J2) for power supply and communication, and a separate J1 interface for MCU program burning and debugging. The pin spacing is compatible with both 2.54mm and 2.00mm jack spacing.
4.1 പിൻഔട്ട് ഡയഗ്രം
J2 Interface (Power & Communication):
- Pin 1 (V): Power Supply Input (3.0V-3.6V or 4.5V-5.5V)
- Pin 2 (IO): General Purpose Input/Output (High/Low Level Output)
- Pin 3 (GND): ഗ്രൗണ്ട്
- Pin 4 (TX): Serial Data Transmit
- Pin 5 (RX): Serial Data Receive
J1 Interface (SWD): Used for MCU program burning and debugging. Specific pin functions for J1 are typically for advanced development and debugging, including SWDIO, SWCLK, Reset, and VCC/GND connections.
4.2 കണക്ഷൻ ഉദാampലെസ്
The module can be connected using standard DuPont lines or integrated into a test kit for easier development.
5. ഓപ്പറേഷൻ
The HLK-LD2402 module operates as a human body stationary micro-motion sensor, primarily communicating via TTL serial communication. It provides real-time detection results and can output high or low logic levels based on detection events.
5.1 കണ്ടെത്തൽ തത്വം
The module uses 24G millimeter wave radar technology to detect subtle movements, including micro-motion (like breathing) and static presence of a human body. The intelligent algorithm processes the radar signals to differentiate between various states of human presence.
5.2 Serial Communication (TTL)
Connect the module's TX and RX pins to a compatible TTL serial interface (e.g., a microcontroller's UART or a USB-TTL converter connected to a computer). The module will transmit detection data through its TX pin. Refer to the module's specific communication protocol documentation (not provided here) for details on data format and commands.
5.3 IO High and Low Level Output
The IO pin can be configured to provide a high or low logic level output based on detection events. This can be used to trigger external circuits or indicate presence/absence without needing to parse serial data. The specific behavior (e.g., high on detection, low on no detection) is typically configurable via the module's firmware settings.
5.4 കോൺഫിഗറേഷൻ
The module supports independent configuration of trigger and hold states. This allows for fine-tuning the sensitivity and response time to suit different application requirements and minimize false positives due to transient events. Configuration details are typically accessed via serial commands.
6. പരിപാലനം
- വൃത്തിയാക്കൽ: Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using liquids or abrasive materials.
- പരിസ്ഥിതി: Operate the module within its specified operating temperature range (-40℃ to 85℃). Avoid exposure to extreme temperatures, high humidity, or corrosive environments.
- ശാരീരിക ക്ഷതം: Handle the module with care to prevent physical damage to the PCB, antennas, or components.
- വൈദ്യുതി വിതരണം: നിർദ്ദിഷ്ട വോള്യത്തിനുള്ളിൽ സ്ഥിരതയുള്ള വൈദ്യുതി വിതരണം ഉറപ്പാക്കുക.tage range (3.0V-3.6V or 4.5V-5.5V) to prevent damage.
7. പ്രശ്നപരിഹാരം
| പ്രശ്നം | സാധ്യമായ കാരണം | പരിഹാരം |
|---|---|---|
| No detection or inconsistent detection | Incorrect power supply; Obstructions in detection area; Module not properly oriented; Environmental interference. | വൈദ്യുതി വിതരണം വോളിയം പരിശോധിക്കുകtage; Ensure clear line of sight for the module; Adjust module orientation for optimal coverage; Minimize sources of electromagnetic interference. |
| No serial data output | Incorrect wiring (TX/RX swapped); Incorrect serial port settings (baud rate, parity, stop bits); Module not powered on. | Check TX/RX connections; Confirm serial port settings match module requirements; Ensure module is powered correctly. |
| IO output not responding | IO pin not configured correctly; External circuit issue; Module not detecting presence. | Review firmware configuration for IO pin behavior; Check external circuit connections; Verify module is detecting presence via serial output. |
| തെറ്റായ കണ്ടെത്തലുകൾ | Vibrations; Air currents; Nearby moving objects; High sensitivity settings. | Mount the module securely to minimize vibrations; Avoid placing near fans or vents; Adjust sensitivity settings (trigger/hold states) via serial commands. |
8 ഉപയോക്തൃ നുറുങ്ങുകൾ
- For initial setup and testing, consider using a USB-TTL converter (like those found in Test Kit-B) to easily interface the module with a computer and monitor serial output.
- Experiment with different mounting heights and angles to optimize the detection area for your specific application. The 60-degree detection angle provides flexibility.
- If experiencing false positives, try adjusting the trigger and hold state parameters through serial commands. This can help filter out minor environmental disturbances.
- Ensure the power supply is stable and within the recommended voltage range to guarantee reliable operation and prevent damage to the module.
9. വാറൻ്റിയും പിന്തുണയും
For warranty information, technical support, or further inquiries regarding the HLK-LD2402 module, please contact Shenzhen Hi-Link Electronic Co., Ltd. directly. Refer to the seller's official website or contact details provided at the point of purchase for the most up-to-date support information.
