1. Introduction
The Huidu HD-A4L is an advanced LED display multimedia player designed for versatile content management. It supports playback of various media types including videos, pictures, GIF animations, texts, WPS documents, tables, clocks, and timing programs. This player integrates both asynchronous and synchronous playback capabilities, offering multi-terminal control and program release functionalities.
Equipped with standard Wi-Fi, the HD-A4L allows for wireless control via the "LedArt" mobile application and supports wireless screen mirroring from mobile phones and tablets. It can also connect to the "XiaoHui Cloud" platform for remote cluster management over the Internet. With ample internal storage, asynchronous playback is seamless. The device further supports external environmental monitoring sensors, enabling real-time data display.
The HD-A4L delivers high video playback performance, incorporates a terminal network security protection mechanism, and features user-friendly software with comprehensive functions, making it a cost-effective solution for various commercial and smart LED display applications.
2. Key Features
2.1 Input Capabilities
- Gigabit Communication Network Port: One port for debugging parameters and faster program sending.
- HD IN Interface: One HDMI input interface supporting automatic zooming of synchronous pictures, and synchronous/asynchronous picture-in-picture functions.
- USB Interfaces: One USB 2.0 channel (custom OTG/USB mode) and one USB 3.0 communication interface for program insertion and capacity expansion.
- Sensor Input: Two channels for connecting various external environmental monitoring sensors.
2.2 Output Capabilities
- Gigabit Output Network Ports: Two standard ports for direct cascading with HD-R series receiving cards to control the display.
- Control Range: Maximum control range of 1.3 million pixels, supporting a maximum horizontal resolution of 16384 pixels and a maximum vertical resolution of 4096 pixels.
- Audio Output: One TRS 3.5mm standard two-channel audio output.
2.3 Functional Highlights
- 2.4GHz Wi-Fi: Standard Wi-Fi for mobile APP wireless control (supports STA mode for connecting to nearby Wi-Fi networks).
- Multi-channel Video Playback: Supports up to 2-channel 4K, 6-channel 1080P, 10-channel 720P, or 20-channel 360P video windows.
- Playback Switching: Supports seamless synchronous and asynchronous switching playback.
- 4G/5G Connectivity (Optional): Access to the XiaoHui Cloud platform for Internet remote cluster management.
- Wireless Projection: Supports wireless screen projection from mobile phones, tablets, and computers.
3. Package Contents
Upon opening your Huidu HD-A4L Multimedia Player package, please verify that all the following items are included:
- 1 x Huidu HD-A4L Multimedia Player
- 1 x HDMI Cable
- 1 x Power Adapter
- 1 x WiFi Glue Stick Antenna
- 1 x Certificate of Qualification
Note: 4G/5G antennas are optional and included only if a 4G/5G module is part of your purchase (typically 1 or 4 antennas depending on the module).
4. Device Layout
4.1 Front Panel Overview
Figure 4.1: Front Panel Diagram
| Serial Number | Name | Description |
|---|---|---|
| 1 | Working Lights |
|
| 2 | SIM Card Slot | Nano SIM card slot for 4G/5G networking for remote control (requires optional 4G/5G module). |
| 3 | Function Buttons |
|
| 4 | Switch | Controls the power of the player box. 'ON' for power on, 'OFF' for power off. |
4.2 Rear Panel Overview
Figure 4.2: Rear Panel Diagram
| Serial Number | Name | Description |
|---|---|---|
| 1 | Wi-Fi Antenna | Connect Wi-Fi antenna to enhance wireless signal. |
| 2 | Sensor | External connection for various sensors (temperature, humidity, brightness, wind speed, wind direction, noise, PM2.5, PM10, CO2, etc.). |
| 3 | 4G/5G Antenna | Connect 4G/5G antenna (4G with 1 antenna, 5G with 4 antennas, optional). |
| 4 | Power Supply | DC 5V-12V, 1.5A input. |
| 5 | Input Network Port (LAN IN) | Gigabit input network port. Connect to a computer for debugging and program release. Can also be used to access LAN or the Internet. |
| 6 | Reset | Reset pinhole. |
| 7 | Audio Output | TRS 3.5mm standard two-channel audio output port. |
| 8 | HDMI IN | HDMI 1.4 synchronous signal input interface, supports adaptive scaling. |
| 9 | USB / OTG | USB 3.0 for updating programs, inserting programs, or expanding capacity. OTG is used for debugging or upgrading firmware (default USB 2.0 function, factory configurable). |
| 10 | Output Network Port (LED1, LED2) | Gigabit output network ports, cascaded with HD-R series receiving cards. |
| 11 | Ground Wire | Ground wire connection port. |
4.3 Dimensions
Figure 4.3: Device Dimensions (Tolerance: ±0.3 Unit: mm)
- Overall Size: 287mm × 140.3mm × 42.3mm
5. Setup Instructions
Follow these steps to set up your Huidu HD-A4L Multimedia Player:
- Power Connection: Connect the provided power adapter to the DC 5V-12V port (4) on the rear panel and plug it into a suitable power outlet.
- Grounding: For optimal safety and performance, connect a ground wire to the Ground wire connection port (11) on the rear panel.
- Wi-Fi Antenna: Screw the Wi-Fi antenna onto the Wi-Fi antenna port (1) on the rear panel to enhance wireless signal reception.
- 4G/5G Antenna (Optional): If your device includes a 4G/5G module, connect the appropriate 4G/5G antenna(s) to the 4G/5G antenna port (3) on the rear panel. Insert a Nano SIM card into the SIM card slot (2) on the front panel.
- Network Connection:
- Wired: Connect an Ethernet cable from your computer or network router to the Input Network Port (LAN IN) (5) on the rear panel.
- Wireless: The device supports Wi-Fi. You can configure it using the "LedArt" APP in STA mode to connect to your local Wi-Fi network.
- Display Connection: Connect the Output Network Ports (LED1, LED2) (10) on the rear panel to your LED display's receiving cards using Ethernet cables.
- HDMI Input (Optional): If using synchronous playback, connect an HDMI source (e.g., computer, media player) to the HDMI IN port (8) on the rear panel.
- Audio Output (Optional): Connect speakers or an audio system to the Audio Output port (7) on the rear panel using a 3.5mm TRS cable.
- Sensor Connection (Optional): Connect any external environmental monitoring sensors to the Sensor ports (2) on the rear panel.
- Initial Power On: Flip the ON/OFF Switch (4) on the front panel to the 'ON' position. Observe the working lights (1) on the front panel to ensure normal operation.
6. Operating Instructions
6.1 Control Modes
The HD-A4L supports various control methods:
- Single-Node Control: Direct control via Wi-Fi, network port connection, or USB interface.
- Cluster Control: Remote management over the Internet via the "XiaoHui Cloud" platform (requires optional 4G/5G module).
- Synchronous Control: Playback content directly from an HD signal input (e.g., HDMI).
6.2 Program Management and Playback
- Software Installation: Install the "LedArt" mobile application on your smartphone or tablet for wireless control, or use the dedicated PC software for wired control.
- Connecting to the Device:
- Wi-Fi: In AP mode, connect your mobile device directly to the player's Wi-Fi hotspot. In STA mode, configure the player to connect to your local Wi-Fi network, then connect your mobile device to the same network.
- Wired: Connect your computer to the LAN IN port (5) on the rear panel.
- USB: Insert a USB drive containing programs into the USB port (9) on the rear panel.
- Uploading Programs: Use the "LedArt" APP or PC software to create, edit, and upload programs (videos, images, text, etc.) to the HD-A4L's internal storage.
- Playback Modes:
- Asynchronous Playback: Programs stored on the device play independently. Use the ASYNC button (3) on the front panel to switch to this mode.
- Synchronous Playback: Content from the HDMI IN source is displayed. Use the HDMI IN button (3) on the front panel to switch to this mode.
- Switching Programs: Press the NEXT button (3) on the front panel to cycle through stored programs.
- Wireless Projection: Utilize the wireless projection feature from your mobile phone, tablet, or computer to mirror content directly to the LED display.
6.3 Control Mode Diagrams
Single-Node Control:
Figure 6.1: Single-Node Control
Cluster Control:
Figure 6.2: Cluster Control
Synchronous Control:
Figure 6.3: Synchronous Control
7. Maintenance
To ensure the longevity and optimal performance of your Huidu HD-A4L Multimedia Player, please follow these maintenance guidelines:
- Environmental Conditions: Operate the device within the specified working environment temperature of -40℃ to 70℃ and humidity of 0%RH to 80%RH (non-condensing).
- Protection Degree: The device has an IP20 protection degree. This means it is protected against solid objects larger than 12.5mm but has no special protection against water. Prevent water from dripping onto the product, and do not get it wet or rinse it.
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Avoid using liquid cleaners or abrasive materials.
- Ventilation: Ensure that the device's ventilation openings are not blocked to prevent overheating.
- Firmware Updates: Regularly check for and apply firmware updates as recommended by Huidu Technology to ensure the latest features and security enhancements.
8. Troubleshooting
This section provides guidance on common issues you might encounter with your HD-A4L player. Refer to the working light indicators on the front panel for initial diagnosis.
| Indicator Light | Status | Meaning / Possible Issue | Action |
|---|---|---|---|
| PWR | Green (always on) | Normal power input. | No action required. |
| Off | No power or power issue. | Check power adapter connection and power source. Ensure the ON/OFF switch is 'ON'. | |
| RUN | Green (flashing) | System running normally. | No action required. |
| Green (always on or off) | System running abnormally. | Restart the device. If issue persists, contact support. | |
| DISP | Green (flashing) | FPGA system running normally. | No action required. |
| Green (always on or off) | System running abnormally. | Restart the device. Check display connections. If issue persists, contact support. | |
| Wi-Fi | Green (blinking) | AP mode active. | Connect your mobile device to the player's Wi-Fi hotspot. |
| Green (always on) | STA mode active, connected to a network. | Ensure your control device is on the same network. | |
| Red (blinking) | Wi-Fi is abnormal. | Check Wi-Fi antenna connection. Restart device. Reconfigure Wi-Fi settings. | |
| Off | No Wi-Fi module detected. | If Wi-Fi is expected, contact support. | |
| 4G/5G | Green (always on) | Connection to cloud server successful. | No action required. |
| Yellow (always on) | Cloud service cannot be connected. | Check network settings, SIM card data plan, or contact your network provider. | |
| Red (always on) | No signal, SIM in arrears, or cannot dial. | Check SIM card, signal strength, or contact your network provider. | |
| Red (blinking) | SIM cannot be detected. | Reinsert SIM card. Ensure it's correctly oriented. | |
| Off | No 4G/5G module detected. | If 4G/5G is expected, contact support. | |
| LAN IN | Yellow (always on) | Network bridge cannot connect to the server. | Check network cable, router, and network configuration. |
9. User Tips
While specific user reviews or Q&A were not provided, here are some general tips for optimizing your experience with the Huidu HD-A4L Multimedia Player:
- Program Optimization: For best performance, ensure your video and image content is optimized for the resolution and refresh rate of your LED display.
- Regular Backups: Periodically back up your display programs and configurations to an external USB drive.
- Network Stability: A stable network connection (wired or Wi-Fi) is crucial for smooth program uploads and remote management. Consider a wired connection for large file transfers.
- Sensor Placement: If using environmental sensors, ensure they are placed in locations that accurately reflect the conditions you wish to monitor.
- Software Updates: Keep the "LedArt" app and PC software updated to their latest versions to benefit from new features and bug fixes.
10. Specifications
Figure 10.1: Product Parameter Table
| Category | Parameter | Value |
|---|---|---|
| Electrical Parameters | Input Power | DC 5V-12V |
| Maximum Power Consumption | 18W | |
| Storage Space | Random Access Memory (RAM) | 2GB |
| Internal Storage | 16GB | |
| Storage Environment | Temperature | -40℃ ~ 80℃ |
| Humidity | 0%RH ~ 80%RH (No condensation) | |
| Working Environment | Temperature | -40℃ ~ 70℃ |
| Humidity | 0%RH ~ 80%RH (No condensation) | |
| Physical | Size (L×W×H) | 287mm × 140.3mm × 42.3mm |
| Net Weight | 1004g | |
| Protection Degree | IP20 (Caution: Water resistance is not guaranteed. Prevent water dripping.) | |
| System Software | Operating System | Android 11.0 |
| Terminal Application Software | Android terminal application software | |
| FPGA Software | FPGA software |
11. Warranty and Support
For warranty information, technical support, or service inquiries regarding your Huidu HD-A4L Multimedia Player, please refer to the documentation provided with your purchase or contact the authorized Huidu Technology distributor or seller from whom you purchased the product. They will be able to provide specific details regarding warranty coverage, return policies, and technical assistance.
