1. Introduction
The BT578 RS232 Serial Port Bluetooth Adaptor is designed to provide wireless Bluetooth connectivity to devices equipped with an RS232 serial port. This adaptor enables seamless communication between your serial devices and Bluetooth-enabled equipment such as computers, laptops, tablets, smartphones, printers, and routers, eliminating the need for physical cables.
2. Features
- Converts RS232 serial data to Bluetooth wireless signals.
- Enables wireless communication for legacy serial devices.
- Compatible with a wide range of Bluetooth-enabled devices.
- Compact and classic design for easy integration.
- Supports standard Bluetooth protocols for reliable data transfer.
3. Package Contents
Please verify that all items are present and in good condition upon opening the package.
- 1 x BT578 RS232 Serial Port Bluetooth Adaptor

Figure 3.1: The BT578 RS232 Serial Port Bluetooth Adaptor. This image shows the compact white adapter with an RS232 male connector on one end and the product label on its body. The label indicates "Model: BT578 V3", "RS232 Bluetooth Adapter", and compliance marks.
4. Setup Instructions
- Connect the Adaptor: Plug the BT578 adaptor directly into the RS232 serial port of your device (e.g., printer, industrial equipment, router). Ensure a secure connection.
- Power On (if applicable): If your RS232 port does not provide sufficient power, the adaptor may require external power. Refer to the adaptor's specifications for power requirements.
- Enable Bluetooth on Your Device: On your computer, laptop, tablet, or smartphone, ensure that Bluetooth is enabled.
- Pairing Mode: The BT578 adaptor should automatically enter pairing mode once powered. Look for a blinking LED indicator on the adaptor (if present) to confirm its status.
- Discover and Pair: On your Bluetooth-enabled device, search for new Bluetooth devices. The BT578 adaptor should appear in the list, typically named "BT578" or similar. Select it to initiate the pairing process.
- Enter Passkey (if prompted): If prompted for a passkey or PIN, enter the default passkey (commonly "0000" or "1234"). Refer to the adaptor's specific documentation for the exact default passkey if these do not work.
- Connection Confirmation: Once successfully paired, the LED indicator on the adaptor (if present) will typically change to a solid light, indicating a stable connection.
5. Operating Instructions
Once the BT578 adaptor is successfully paired with your Bluetooth device, it functions as a transparent serial bridge, allowing data to be transmitted wirelessly between the RS232 port and the Bluetooth connection.
- Data Transmission: Any data sent to the RS232 port of the adaptor will be transmitted wirelessly via Bluetooth to the paired device, and vice-versa.
- Serial Port Settings: Ensure that the serial port settings (baud rate, data bits, parity, stop bits, flow control) on both the RS232 device and the Bluetooth-connected device (e.g., virtual COM port on your PC) are configured identically for proper communication.
- Application Usage: Use your preferred serial communication software (e.g., PuTTY, Tera Term, custom applications) on your Bluetooth-connected device to interact with the RS232 device.
6. Maintenance
To ensure the longevity and optimal performance of your BT578 adaptor, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the adaptor. Do not use liquid cleaners or aerosols.
- Storage: Store the adaptor in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid dropping the adaptor or subjecting it to strong impacts.
- Environmental Conditions: Do not expose the adaptor to water, moisture, or corrosive environments.
7. Troubleshooting
If you encounter issues with your BT578 adaptor, refer to the following common troubleshooting steps:
- Adaptor Not Powering On:
- Ensure the adaptor is securely connected to the RS232 port.
- Verify that the RS232 device is powered on and providing sufficient power to the port (if applicable).
- Cannot Find Adaptor During Bluetooth Scan:
- Make sure Bluetooth is enabled on your scanning device.
- Ensure the adaptor is within the effective range of your Bluetooth device.
- Restart both the adaptor (by unplugging and replugging) and your Bluetooth device.
- Pairing Fails or Requires Passkey:
- Try default passkeys like "0000" or "1234".
- Ensure no other devices are actively trying to pair with the adaptor.
- Data Transmission Errors:
- Verify that the serial port settings (baud rate, data bits, parity, stop bits, flow control) are identical on both the RS232 device and the Bluetooth-connected device.
- Check for interference from other wireless devices.
- Ensure the adaptor and the Bluetooth device are within optimal range.
8. Specifications
| Attribute | Value |
|---|---|
| Model Number | BT578 |
| Hardware Interface | Bluetooth, RS232 |
| Compatible Devices | Desktops, Laptops, Tablets, Smartphones, Printers, Routers, Other relevant hardware with RS232 serial ports |
| Style | Classic |
| Manufacturer | Generic |
| Date First Available | January 30, 2024 |
9. Warranty and Support
Specific warranty information and support details for the BT578 RS232 Serial Port Bluetooth Adaptor are not provided in the available product data. Please refer to the seller or manufacturer's website for any applicable warranty terms and technical support contact information.



