1. Product Overview
The PDDAXLQUE CP26 is an industrial-grade RS232 to Bluetooth Serial Adapter designed to convert wired RS232 and RJ45 interface devices into wireless Bluetooth communication. This module facilitates wireless communication with PCs, iOS, and Android devices, making it suitable for debugging, parameter setting, and information querying in various application scenarios.
Key Features:
- Wireless Conversion: Transforms RS232 & RJ45 wired devices to Bluetooth for wireless communication.
- Bluetooth 5.1 BLE: Features a Renesas DA14531 chip with PA Amplifiers for stable communication.
- Extended Range: External rubber stick antenna provides visual communication distances of up to 90m for mobile phones, 70m for PCs, and 400m for device-to-device connections.
- Built-in Battery: Rechargeable lithium battery offers up to 24 hours of operation, chargeable via a Type-C port.
- Adjustable Baud Rate: Supports multiple baud rates (2400 to 115200 bps) switchable via a button.

2. Setup Guide
2.1 What's in the Box (CP26 for Phone - T1 Package):

- 1 x DX-CP26 Bluetooth Serial Adapter
- 1 x Rubber Stick Antenna
- 1 x RS232 Adapter Cable
- 1 x RJ45 Adapter Cable
- 1 x USB Charging Cable
2.2 Physical Connection:
Connect the appropriate adapter cable (RS232 or RJ45) to your device. Attach the rubber stick antenna to the CP26 adapter. Ensure all connections are secure.

2.3 App Download and Installation (for Mobile Phone Control):
This device requires the "DX-SMART" app for smartphone connectivity. Download and install the app from the Apple App Store or Google Play Store.
2.4 Initial Power On and Baud Rate Check:
- Press and hold the KEY button on the CP26 for one second to turn it on.
- Observe the blue light indicator. The number of flashes indicates the current baud rate. The default baud rate is 9600 bps (three flashes).
Baud Rate Indicators:
- 1 flash: 2400 bps
- 2 flashes: 4800 bps
- 3 flashes: 9600 bps (Default)
- 4 flashes: 19200 bps
- 5 flashes: 38400 bps
- 6 flashes: 57600 bps
- 7 flashes: 115200 bps
To switch the baud rate, short press the KEY button twice consecutively. The blue light will flash to indicate the new baud rate.

3. Operating Instructions
3.1 Mobile Phone Connection and Control:
- Ensure Bluetooth and location services are enabled on your mobile phone.
- Open the "DX-SMART" app.
- Go to the homepage and click on "Transmission" to search for Bluetooth devices.
- Locate the device named "RS232/485" and connect to it. A "Connected" message indicates a successful connection.
- You can now send and receive data to control your RS232/RJ45 device wirelessly.

3.2 Computer Communication (Requires CP11 Adapter):
To communicate with a PC, you need to purchase a separate CP11 Bluetooth adapter (not included in the standard CP26 for Phone package).
- Open the datasheet/download the "CH341" driver on your computer.
- Insert the CP11 adapter into a computer USB port.
- Press and hold the KEY button of the CP26 for one second to switch on the computer.
- Open the serial port software and select the COM port of the corresponding CP11 adapter. Choose the default parameter configuration: 9600bps/8/n/1.
- Wait for the CP11 adapter to actively search for the CP26 Bluetooth converter and connect. The blue light on the CP11 will be solid when connected. After connection, data interaction can occur.

3.3 Device-to-Device Communication:
Wireless data communication between two devices is achieved through the CP26 Multi-function Bluetooth Wireless Converter. The setup involves:
- Connect the CP26 master to device 1 via the RS232/RJ45 interface.
- Connect the CP26 slave to device 2 via the RS232/RJ45 interface.
- The CP26 Master Bluetooth will pair with the CP26 Slave Bluetooth.
- After the connection, data can be exchanged.

3.4 Example Applications:
The CP26 adapter can be used in various industrial and personal applications:
- Viewing total station data via mobile phone.
- Viewing switch data via mobile phone.
- Updating PLC programs via PC.
- Setting inverter parameters on a computer.
- Setting elevator parameters via PC.
- Wireless communication between electronic scales and printers.

3.5 Official Product Videos:
Video: CP26 RS232 to Bluetooth Serial Adapter Industrial Wireless Bluetooth Communication Module to RS232. This video provides an overview of the CP26 adapter's functionality and its role in converting RS232 devices to wireless Bluetooth communication.
Video: DX-CP26 Wireless Communication Quick Verification Guide. This video demonstrates a quick verification process for the DX-CP26 wireless communication, showing how to confirm proper operation.
4. Specifications
| Feature | Detail |
|---|---|
| Brand | PDDAXLQUE |
| Hardware Interface | Bluetooth 5 |
| Color | Black-DX-CP26-T1 |
| Compatible Devices | Desktop, Device, Smartphone |
| Data Link Protocol | Bluetooth |
| Data Transfer Rate | 9 Kbps |
| Item Weight | 173 Grams |
| Minimum Required Operating System Version | Android 10.0, Windows 7, iOS 8 |
| Model Number | CP26 for Phone |
5. Maintenance
- Charging: The DX-CP26 has a built-in rechargeable lithium battery. Charge it via the TYPE-C port. A red light indicates charging, and the light turns off when fully charged.
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Antenna Care: Handle the external rubber stick antenna with care to prevent damage.
6. Troubleshooting
Common Issues and Solutions:
- Device not connecting to smartphone:
- Ensure Bluetooth and location services are enabled on your phone.
- Verify the "DX-SMART" app is installed and running.
- Confirm the CP26 is powered on and its blue light is blinking (indicating discoverable mode).
- Check if the device is named "RS232/485" in the app's search results.
- Device not connecting to PC:
- Remember that direct Bluetooth connection to a PC is not supported without the separate CP11 adapter.
- If using the CP11 adapter, ensure its drivers are correctly installed.
- Verify the correct COM port and baud rate (default 9600bps/8/n/1) are selected in your serial port software.
- Incorrect Baud Rate:
- Double-press the KEY button on the CP26 to cycle through baud rates until the desired rate is indicated by the blue light flashes.
- Short-circuit verification failure:
- Ensure the short-circuit using the jumper cap is performed after the CP26 has successfully started up.
7. Warranty and Technical Support
PDDAXLQUE offers a 1-year warranty for this product.
For technical support, product information, or service assistance, please contact us through the User Guide → Product Information → Service Support section within the app or refer to the detailed information package provided with the product. This package includes product manuals, tutorial videos, and development/testing tools.