1. Introduction
This manual provides essential information for the proper setup, operation, and maintenance of the RTL8733BU WiFi Bluetooth module. The RTL8733BU is a compact wireless communication module featuring 150Mbps WiFi connectivity and Bluetooth 5.2, designed for integration into various electronic devices. It supports dual-band operation (2.4GHz and 5.8GHz) and utilizes a USB interface for data communication.
2. Setup and Installation
Careful handling and correct pin connections are crucial for the proper functioning of the RTL8733BU module. Refer to the diagrams and pinout table below for detailed connection instructions.
2.1 Module Dimensions and Pin Diagram
The module measures approximately 12.2mm by 12.9mm. The pin diagram (Figure 4 in the image) indicates the layout of the 20 pins from a top-down perspective.
2.2 Pinout Description
The following table details the function of each pin on the RTL8733BU module:
| Pin No. | Pin Name | Function Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | RFO | BT RF TX/RX signal |
| 3 | RFI | WLAN RF TX/RX signal |
| 4 | GND | Ground |
| 5 | BT_PCM_IN | PCM input |
| 6 | BT_PCM_OUT | PCM output |
| 7 | BT_PCM_SYNC | PCM sync |
| 8 | BT_PCM_CLK | PCM clock |
| 9 | BT_WAKE_HOST | Bluetooth device wake up host |
| 10 | HOST_WAKE_BT | Host wake up Bluetooth device |
| 11 | VDD33 | Main power voltage source input 3.3V |
| 12 | USB_DM | USB2.0 differential pair for WLAN And Bluetooth |
| 13 | USB_DP | USB2.0 differential pair for WLAN And Bluetooth |
| 14 | GND | Ground |
| 15 | NC | Not connecting |
| 16 | NC | Not connecting |
| 17 | NC | Not connecting |
| 18 | CHIP_EN | CHIP_EN |
| 19 | HOST_WAKE_WL | Host wake up WLAN device |
| 20 | WL_WAKE_HOST | WLAN device wake up host |
Key Connections:
- Power Supply: Connect VDD33 (Pin 11) to a stable 3.3V power source. Ensure all GND pins (1, 4, 14) are properly connected to ground.
- USB Interface: Connect USB_DM (Pin 12) and USB_DP (Pin 13) to the host's USB 2.0 differential pair.
- RF Signals: RFO (Pin 2) for Bluetooth RF and RFI (Pin 3) for WLAN RF. These should be connected to appropriate antenna circuitry.
- Control Signals: CHIP_EN (Pin 18) for chip enable. HOST_WAKE_BT (Pin 10) and HOST_WAKE_WL (Pin 19) are used by the host to wake up Bluetooth and WLAN devices, respectively. BT_WAKE_HOST (Pin 9) and WL_WAKE_HOST (Pin 20) are used by the module to wake up the host.
- PCM Interface: BT_PCM_IN (Pin 5), BT_PCM_OUT (Pin 6), BT_PCM_SYNC (Pin 7), and BT_PCM_CLK (Pin 8) are for PCM audio data.
2.3 System Block Diagram
The block diagram provides a high-level overview of the module's internal architecture and external interfaces, including antenna connections via a DIPEXER for WLAN and Bluetooth.
3. Operating Instructions
The RTL8733BU module provides both WiFi and Bluetooth functionalities. Once properly integrated and powered, the module communicates with the host system via the USB interface.
- WiFi Operation: The module supports IEEE 802.11 b/g/n standards, operating on both 2.4GHz and 5.8GHz bands. The host system will need appropriate drivers to interface with the module and manage WiFi connections.
- Bluetooth Operation: Featuring Bluetooth 5.2, the module allows for robust and efficient Bluetooth communication. The PCM interface can be utilized for audio applications requiring Bluetooth.
- Host Control: The CHIP_EN pin controls the module's power state. Wake-up signals (HOST_WAKE_BT, HOST_WAKE_WL, BT_WAKE_HOST, WL_WAKE_HOST) facilitate power management and communication synchronization between the module and the host.
4. Maintenance
The RTL8733BU module is a sensitive electronic component. Minimal user maintenance is required beyond proper installation and environmental considerations.
- Handling: Always handle the module with care, preferably using anti-static precautions, to prevent damage from electrostatic discharge (ESD).
- Environment: Ensure the module is operated within its specified temperature and humidity ranges. Avoid exposure to moisture, dust, and extreme temperatures.
- Cleaning: If necessary, gently clean the module's exterior with a dry, soft cloth. Do not use liquid cleaners or solvents.
5. Troubleshooting
If you encounter issues with the RTL8733BU module, consider the following basic troubleshooting steps:
- No Power/Functionality:
- Verify that the VDD33 pin is receiving a stable 3.3V power supply.
- Ensure all GND pins are securely connected.
- Check the CHIP_EN pin to ensure the module is enabled.
- USB Communication Issues:
- Confirm correct connections for USB_DM and USB_DP.
- Ensure the host system has the necessary drivers installed for the RTL8733BU.
- WiFi/Bluetooth Connectivity Problems:
- Check antenna connections (WL-ANT, BT-ANT) for proper seating and integrity.
- Ensure the host system's software is correctly configured for WiFi and Bluetooth operation.
- Verify that the module is within range of the desired network or Bluetooth device.
- Intermittent Operation:
- Inspect all solder joints for cold joints or shorts.
- Ensure adequate heat dissipation if the module is operating in a confined space.
For persistent issues, consult the module's datasheet or contact technical support.
6. Specifications
| Feature | Description |
|---|---|
| Model Number | RTL8733BU |
| Type | Wireless Module |
| Brand Name | W |
| Origin | Mainland China |
| Condition | New |
| WiFi Standard | IEEE 802.11 b/g/n |
| WiFi Speed | Up to 150Mbps |
| WiFi Bands | Dual-band (2.4GHz, 5.8GHz) |
| Bluetooth Version | Bluetooth 5.2 |
| Interface | USB 2.0, PCM |
| Power Input | 3.3V (VDD33) |
| Dimensions | 12.2mm x 12.9mm |
| Package Weight | 0.015 kg |
| Package Dimensions | 3cm x 4cm x 5cm |
7. User Tips
No specific user tips were available from reviews or Q&A for this product.
8. Warranty and Support
For technical assistance, warranty inquiries, or further support regarding the RTL8733BU module, please contact the seller, W Official Store, directly through the platform where the purchase was made. Ensure you provide your order details and a clear description of the issue for efficient support.
