1. Introduction
The DX-CP24 is a versatile wireless Bluetooth communication module designed to convert traditional wired RS485 communication to wireless Bluetooth. It supports the Modbus protocol, enabling seamless communication between various devices such as PLCs, inverters, servo motors, textile machines, and touch panels, and control devices like PCs, mobile phones (iOS/Android).
This module aims to simplify complex wiring, reduce labor maintenance costs, and provide flexible wireless debugging and control capabilities.
Video: DX-CP24 Open Box and Basic Setup Overview
2. Key Features and Specifications
2.1 Key Features
- Utilizes Renesas DA14531 chip + PA Amplifiers for reliable performance.
- Supports Bluetooth BLE 5.1.
- Supports RS485 interface.
- Supports Modbus protocol.
- Enables communication between PC/iOS/Android and RS485 devices.
- Supports changing baud rates: 2400, 4800, 9600, 19200, 38400, 57600, 115200.
- External rubber stick antenna for enhanced range.
- Visual communication distance: Mobile phone to device: 90m, PC to device: 400m (unobstructed, open area).
- Wide power supply range: DC5-36V.
- Operating temperature: -40 to +85°C.
2.2 Specifications
| Parameter | Value |
|---|---|
| Model Number | DX-CP24 |
| Brand Name | PDDAXLQUE |
| Origin | Mainland China |
| Chipset | DIALOG 14531 |
| Application | IoT |
| Bluetooth Version | Bluetooth 5.1 |
| Certification | CE, FCC, RoHS |
| Power Supply | DC5-36V |
| Interface | RS485 |
| Function | Wireless Data Transmission |
| Device Size | 60 * 27.8 * 16.4mm |
| Working Temperature | -40 to +85°C |
Image: CP24 Key Features and Physical Dimensions
3. Package Contents
The DX-CP24 module is available in different configurations. Please check your specific package.
3.1 DX-CP24 for Smart Phone Control (T1)
- CP24 Adapter x1
- Rubber Stick Antenna x1
- RJ45 Plug to 4P 5.0mm Terminal Block x1
- CP24 Instruction x1
3.2 DX-CP24 for Computer Control (T2)
- CP24 Adapter x1
- CP11 USB to RS485 Adapter x1
- Rubber Stick Antenna x1
- RJ45 Plug to 4P 5.0mm Terminal Block x1
- CP24 Instruction x1
Image: DX-CP24 for Mobile Phone Package Contents
4. Setup and Installation
4.1 Wiring Method
Connect the DX-CP24 module to your RS485 device and power supply using the provided terminal block. Ensure correct polarity and connections:
- A+: RS485 A+ terminal
- B-: RS485 B- terminal
- 5-36V (VCC): Power supply positive (DC5-36V)
- GND: Power supply ground
Image: DX-CP24 Wiring Diagram and Hardware Interface Parameters
4.2 Mobile Phone Connection (for T1 and T2)
To connect the DX-CP24 to your mobile phone:
- APP Download:
- iOS users: Visit the App Store, search for "DX-SMART," and download/install the app.
- Android users: Visit Google Play or your phone's default app store, search for "DX-SMART," and download/install the app.
- Connect the CP24 to the device via the RS485 interface.
- Open the "DX-SMART" App on your mobile phone.
- Navigate to the "Transmission" section to search for Bluetooth devices.
- After successful connection, you can control your RS485 devices wirelessly.
Image: Mobile Phone Connection Method and Android App Interface
4.3 Computer Connection (for T2)
For computer debugging of RS485 interface devices, you will need the CP11 Bluetooth adapter included in the T2 package:
- Plug the CP11 adapter into a computer USB port and power it on.
- Download and install the 'CH341' driver from the official website (en.szdk-smart.com) onto your computer.
- Plug the CP11 adapter into the PC side and connect the CP24 to the device via the RS485 interface.
- Open serial port software on your computer and select the COM port corresponding to the CP11 adapter. Configure the serial port parameters (e.g., 9600bps/8/n/1).
- The CP11 adapter will actively search for the CP24 Bluetooth converter and connect. A long blue light on the CP11 indicates a successful connection, and data can then be exchanged.
Image: Computer Debugging Setup with CP11 Adapter
4.4 Wireless Communication Between Devices (Master-Slave)
The CP24 Multi-function Bluetooth Wireless Converter can establish wireless data communication between two RS485 devices in a Master-Slave configuration:
- Connect the CP24 Master module to Device 1 via the RS485 interface.
- Connect the CP24 Slave module to Device 2 via the RS485 interface.
- The CP24 Host (Master) will actively search for CP24 Slaves and connect to them.
- After connection, data interaction can be carried out wirelessly.
Image: Wireless Communication Between Devices Diagram
5. Operating Instructions
5.1 Key Button and Baud Rate Adjustment
The KEY button on both the CP24 and CP11 adapters is used for controlling Bluetooth connection and adjusting the baud rate.
- CP24 Key Function:
- Short press twice consecutively to switch the baud rate.
- The number of times the blue LED blinks represents the baud rate:
- Once: 2400
- Twice: 4800
- Three times: 9600 (Factory default)
- Four times: 19200
- Five times: 38400
- Six times: 57600
- Seven times: 115200
- CP11 Key Function:
- Short press once to disconnect the Bluetooth connection.
- Short press twice consecutively to switch the baud rate.
- The number of times the red light blinks represents the baud rate (same sequence as CP24).
Image: CP24 Hardware Description (Indicators and Key)
Image: CP11 Adapter and Hardware Notes
5.2 Indicator Lights
The modules feature several indicator lights to show their status:
- TX Data Indicator: Blinking when Bluetooth sends data.
- RX Data Indicator: Blinking when Bluetooth receives data.
- WORK Status Indicator (CP24):
- When Bluetooth is not connected: The blue LED blinks.
- When Bluetooth is connected: The blue LED stays on constantly.
- WORK Status Indicator (CP11):
- Not connected: Red light blinks for baud rate number.
- Connected: Red light is on for a long time.
6. Applications
The DX-CP24 module can be used in a wide range of industrial and IoT applications:
- PLC program updates via PC.
- Setting inverter parameters using a mobile phone.
- Computer-based setting of lift parameters.
- Setting servo motor parameters on mobile phones.
- Configuring parameters for textile machinery via computer.
- Touch screen control for PLCs.
- Cash registers, Handwriting boards, Touch Screens, Industrial Control Machines, Temperature control equipment, Tax Control Machines, Scanners, CNC machine tools, PLAM, LED Displays, Access control systems.
Image: Bluetooth-RS485 Conversion Application Examples
7. Troubleshooting
- No Connection/Connection Drops:
- Ensure the CP24 module is properly powered (DC5-36V) and wired correctly to the RS485 device.
- Verify that the baud rate settings on the CP24 (indicated by LED blinks) match the baud rate of the connected RS485 device and the controlling application (mobile app or PC software).
- Check the distance between the CP24 and the controlling device. The specified distances (90m for mobile, 400m for PC) are for unobstructed, open areas. Obstacles can significantly reduce range.
- For PC connection, ensure the CP11 adapter is securely plugged in and its CH341 driver is correctly installed.
- Check the WORK status indicator on the CP24/CP11. A solid blue/red light indicates a connected state.
- Data Transmission Issues:
- Confirm that the TX and RX indicators are blinking, indicating data activity. If not, check the connection and baud rate.
- Ensure the Modbus protocol settings (if applicable) are correctly configured in your application.
- Baud Rate Not Changing:
- Ensure you are double-clicking the KEY button quickly and consecutively to trigger the baud rate change.
- Observe the LED blinks to confirm the new baud rate setting.
- BLE PIN Code/Name Change:
- The provided information does not detail how to change the BLE PIN code or name directly through the module's physical interface. This functionality is typically managed within the controlling application (e.g., "DX-SMART" app) or through specific software tools. Please check the app settings or consult the technical support for advanced configuration.
- Unsupported Baud Rates (e.g., 1200bps):
- The DX-CP24 module supports specific baud rates as listed (2400, 4800, 9600, 19200, 38400, 57600, 115200). If your device requires a different baud rate, it may not be compatible with this module.
8. User Tips
- Always ensure the baud rate of the DX-CP24 matches that of your RS485 device for successful communication. The default baud rate is 9600.
- For mobile control, download the official "DX-SMART" app from your device's app store.
- When using the CP11 adapter for PC control, remember to install the CH341 driver first.
- The stated transmission distances are optimal for open, unobstructed environments. In real-world scenarios with walls or interference, the range may be reduced.
- If you encounter issues with BLE PIN code or name customization, check the settings within the "DX-SMART" application or contact technical support.
9. Maintenance
- Keep the module clean and free from dust and debris.
- Avoid exposing the device to extreme temperatures, humidity, or corrosive environments.
- Ensure the power supply is within the specified DC5-36V range to prevent damage.
- Handle the antenna and connectors with care to avoid physical damage.
10. Warranty and Support
For warranty information, please refer to the terms provided by your seller at the time of purchase.
For technical support or inquiries, you can contact the manufacturer:
- Website: en.szdk-smart.com
- Email: Manager@szdk-smart.com
Image: Technical Support and Certifications
11. Certifications
The DX-CP24 module meets global certification standards, including:
- CE
- FCC
- RoHS
- ISO
