1. Introduzione
The HLK-LD2410 is a high-sensitivity 24GHz human presence status sensing module developed by Hi-Link Electronics. It utilizes FMCW (Frequency-Modulated Continuous Wave) technology to detect human targets within a defined space. Combined with advanced radar signal processing and a precise human body induction algorithm, it achieves highly sensitive human presence detection, capable of identifying both moving and stationary human bodies. It can also provide auxiliary information such as the distance to the target.
This module is primarily designed for indoor applications to detect the presence of moving or micro-moving human bodies and output detection results in real-time. The farthest sensing distance is up to 6 meters, with a distance resolution of 0.75m. A visual configuration tool is provided to easily adjust sensing distance, sensitivity in different intervals, and unmanned delay time, adapting to various application needs.
The HLK-LD2410 supports GPIO and UART output, offering plug-and-play functionality for flexible integration into smart scenarios and terminal products.
The HLK-LD2420 is a high-performance 24 GHz radar module featuring one transmitter and one receiver antenna. Its human sensing algorithm leverages millimeter wave radar distance measurement technology and advanced proprietary signal processing from S3 series chips for accurate sensing of moving, micro-movement, and standing human bodies. It has a maximum sensing distance of 8 meters and can be configured for distance range, sensitivity, and refresh time in different zones. It supports GPIO and UART interfaces.
Video 1.1: Oltreview of the 24GHz mmwave human presence sensor radar module.
2. Caratteristiche del prodotto
- Plug and play, easy assembly.
- Longest sensing distance up to 6 meters (HLK-LD2410) / 8 meters (HLK-LD2420).
- Large detection angle, coverage up to ±60 degrees.
- Accurate identification within intervals, supporting division of sensing range and shielding interference outside the interval.
- Multi-level intelligent parameter adjustment to meet scene changes.
- Visual debugging and configuration tools available.
- Small and simplified design: HLK-LD2410 is 7mm x 35mm, HLK-LD2420 is 20mm x 20mm.
- Supports various installation methods such as ceiling hanging and wall hanging.
- 24GHz ISM band, compliant with FCC and CE spectrum regulations.
- Ampio volumetage power supply: 5V (HLK-LD2410), 3.3V (HLK-LD2420, supports 3.0V ~ 3.6V).
- No blind detection zone, with proximity 0.2m sensing for HLK-LD2420.
- Independent configuration of trigger and hold states for strong anti-interference capability.
3. Specifiche
3.1 Specifiche generali
- Fonte di energia: Other (typically 5V for LD2410, 3.3V for LD2420)
- Metodo di comunicazione: Other (UART, GPIO, Bluetooth for BLE variants)
- Fotocamera dotata di: Yes (implied by sensing capabilities, not a physical camera)
- Stato dell'Assemblea: Pronto per partire
- Origine: Cina continentale
- Certificazione: CE, RoHS
3.2 HLK-LD2410 Specifics
- Misurare: 7 mm x 35 mm
- Banda di frequenza di lavoro: 24 GHz~24.25 GHz
- Risoluzione della distanza: 0.75 metri
- Temperatura ambiente: -40 ~ 85℃
- Volume di lavorotage: 5V
- Modulazione: FMCW
- Farthest sensing distance: 6m
Figure 3.1: HLK-LD2410 Module Dimensions (Unit: mm)
3.3 HLK-LD2420 Specifics
- Misurare: 20 mm x 20 mm
- Banda di frequenza di lavoro: 24 GHz~24.25 GHz
- Temperatura ambiente: -40 ~ 85℃
- Volume di lavorotage: 3.3V (3.0V ~ 3.6V wide range)
- Corrente operativa media: 50mA
- Motion body sensing distance: fino a 8m
- Angolo di rilevamento: ±60°
Figura 3.2: Modulo HLK-LD2420 (parte superiore View)
3.4 Radar Sensing Module Comparison Table
Figure 3.3: Radar Sensing Module Selection Table
3.5 HLK-LD2420 Specification Parameters
Figure 3.4: HLK-LD2420 Specification Parameters
4. Setup and Hardware Description
4.1 HLK-LD2410 Module Overview
The HLK-LD2410 module has a compact size of 7mm x 35mm. It features 5 pin holes for connectivity, though pins may not be pre-attached from the factory. The pin hole diameter is 0.6mm, with a pin spacing of 1.27mm.
Figure 4.1: HLK-LD2410 Module (Front View)
Figure 4.2: HLK-LD2410 Module (Back View)
4.2 Pin Definitions (HLK-LD2410)
Figure 4.3: HLK-LD2410 Physical Drawing and Pin Descriptions
The module is equipped with 5 pins. The picture above shows the front and back of the module. J2 is used for power supply and communication. J1 is the SWD interface, used for MCU program burning and debugging.
| J#PIN# | Nome | Funzione | Descrizione |
|---|---|---|---|
| J1Pin1 | Terra | Messa a terra | |
| J1Pin2 | DIO | SWD Interface Data Cable | 0 ~ 3.3 V |
| J1Pin3 | Orologio | SWD Interface clock line | 0 ~ 3.3 V |
| J1Pin4 | 3V3 | Potenza assorbita | 3.0 V ~ 3.6 V, Typ. 3.3V |
| J#PIN# | Nome | Funzione | Descrizione |
|---|---|---|---|
| J2Pin1 | 3V3 | Potenza assorbita | 3.0 V ~ 3.6 V, Typ. 3.3V |
| J2Pin2 | Terra | Messa a terra | |
| J2Pin3 | OT1 | IO for reporting detection status: high for occupied, low for unoccupied | 0 ~ 3.3 V |
| J2Pin4 | RX | UART_RX | 0 ~ 3.3 V |
| J2Pin5 | TX | UART_TX | 0 ~ 3.3 V |
Note: J1, J2 interface pin spacing 2.54 mm.
4.3 Recommended Kit Components (LD2410 KIT-B(BLE))
For ease of testing and development, a kit version is available which typically includes:
- HLK-LD2410 module * 1
- Radar test board * 1
- USB antenna (Type-C) * 1
- SH1.27mm 5P Dupont Line (cable) * 1
Figure 4.4: HLK-LD2410 KIT-B(BLE) Components
Figure 4.5: SH1.27mm Line Cable
5. Istruzioni per l'uso
5.1 Visual Configuration Tool (PC)
A PC-based visual configuration tool is provided to facilitate quick and efficient testing and configuration of the module. This software allows users to connect to the module's serial port, read and configure parameters, receive detection results, and visualize data in real-time.
How to use the PC Host Computer Tool:
- Use a USB to serial port tool to correctly connect to the module's serial port.
- In the host computer tool, select the corresponding serial port number, set the baud rate to 256000, select 'Engineering Mode', and click 'Connect Device'.
- Once successfully connected, click the 'Start' button. The graphical interface on the right will display test results and data.
- If the 'Start' button is not clicked, or if 'Stop' is clicked after starting, mode parameter information can be read or set.
Note: Parameters cannot be read or configured while the tool is 'Start'ed. Configuration can only be performed after clicking 'Stop'.
Figure 5.1: PC Host Computer Tool Interface
The circular indicator (ball) represents the target state output: red indicates a moving target, purple indicates a stationary target, and green indicates no one detected.
Figure 5.2: Motion and Static Target Graphs in PC Tool
5.2 Bluetooth Instructions (HLK-LD2410(BLE) / HLK-LD2410C)
5.2.1 Installazione del software
The companion APP supports both Android and iOS platforms. You can download it from the following link (for Android): https://www.pgyer.com/Lq8p. Alternatively, search for "HLKRadarTools" in major app stores to install it.
5.2.2 Istruzioni per l'uso
Open the APP. It will automatically search for nearby radar devices. The broadcast name of the device will be "HLK-LD2410B_xxxx" (where xxxx represents the last four digits of the MAC address). After successfully connecting to the module, you can view radar information, debug, and save parameters.
The effective operating distance for the APP should be within the Bluetooth signal range (typically within 4 meters).
Figura 5.3: Interfaccia APP Bluetooth
The process for modifying radar parameters via the Bluetooth APP is similar to that of the PC host computer tool.
5.3 Installation Methods and Detection Range
The modules support various installation methods, including ceiling mounting and wall mounting. The detection range varies based on the installation height and orientation.
Figure 5.4: Typical Radar Detection Range
6. Manutenzione
- Keep the module dry and clean. Avoid exposure to moisture or corrosive substances.
- Operate within the specified ambient temperature range (-40 ~ 85℃) to ensure optimal performance and longevity.
- Evitare urti fisici o forza eccessiva sul modulo.
- Ensure proper ventilation if enclosed, especially in continuous operation, to prevent overheating.
7. Risoluzione Dei Problemi
7.1 Parameters Cannot Be Configured
If you are unable to read or set parameters using the PC Host Computer Tool or Bluetooth APP, ensure that the detection process is stopped. Parameters can only be configured when the module is not actively detecting (i.e., after clicking 'Stop' in the software).
7.2 Re-enabling Bluetooth (HLK-LD2410(BLE) / HLK-LD2410C)
The Bluetooth function is enabled by default. It can be turned off or on via the serial port protocol (refer to the HLK-LD2410(BLE) serial port communication protocol PDF for details). If Bluetooth has been turned off, or if the serial port is inaccessible, you can re-enable Bluetooth by powering off the module and then powering it on more than 5 times within a 2-3 second interval.
8. Suggerimenti per l'utente
- For initial setup and testing, using the recommended kit (module + test board + USB antenna) can simplify the process.
- Always refer to the official datasheets and software documentation available on the Hi-Link webposto (https://www.hlktech.net/index.php?id=download-center) for the most up-to-date information and detailed protocols.
- When configuring sensitivity, start with moderate values and adjust incrementally to fine-tune detection for your specific environment and target types (moving, micro-moving, stationary).
9. Garanzia e supporto
For technical support, detailed documentation, or warranty inquiries, please contact Hi-Link directly. You can find contact information and resources on their official websito.
Informazioni sui contatti:
- Websito: www.hlktech.net
- E-mail: anna@hlktech.com
- Skype: c-alicekuang
- Cellulare/WhatsApp: +86 13632657057
