1. Introduction
This manual provides detailed instructions for the Rakstore JDY-27 BLE 5.1 Master Slave Integrated Bluetooth Module. It covers the module's specifications, setup procedures, operational guidelines, and basic troubleshooting to ensure proper and efficient use.
2. Product Overview
The JDY-27 is a versatile Bluetooth Low Energy (BLE) 5.1 module designed for transparent data transmission. It supports both master and slave modes, making it suitable for a wide range of 2.4G communication applications via its UART interface.
Figure 1: Top-down view of two JDY-27 Bluetooth modules, showcasing their compact design and integrated PCB antenna.
Figure 2: Angled perspective of a single JDY-27 module, highlighting the surface-mounted components and the integrated antenna trace.
Figure 3: Top-down view of the JDY-27 module, indicating its physical dimensions of 20mm in length and 15mm in width.
Figure 4: Bottom view of the JDY-27 module, displaying the pinout labels for connection to external circuits.
3. Specifications
The following table details the technical specifications of the JDY-27 BLE 5.1 module:
| Parameter | Value |
|---|---|
| Model | JDY-27 |
| Working Frequency Band | 2.4G |
| Transmitting Power | 2db (max) |
| Communication Interface | UART |
| Working Voltage | 1.7V ~ 3.6V |
| Working Temperature | -40℃ ~ 80℃ |
| Antenna | Built-in PCB antenna |
| Receiving Sensitivity | -96dbm |
| Transmission Distance | 100 meters |
| Master-Slave Support | Master-slave integration |
| Bluetooth Version | BLE 5.1 (compatible with BLE4.0, BLE4.2, BLE5.0) |
| Wake-up State Current | 300uA (with broadcast) |
| Light Sleep State Current | <50uA (with broadcast) |
| Deep Sleep Current | 1uA (no broadcast) |
| Command Parameter Saving | Parameter configuration data is saved after power-off |
| SMT Soldering Temperature | <250℃ |
| Serial Port to Mobile Phone | 12K Byte/S (supports 115200 full-speed transparent data transmission without packet loss) |
| Mobile Phone to Serial Port | 8K Byte/S |
| Android MTU Support | ≤247 byte |
| Apple MTU Support | ≤185 byte |
4. Setup
To set up the JDY-27 module, follow these general steps:
- Power Supply: Connect the VCC pin to a stable power source within the 1.7V to 3.6V range. Ensure proper grounding by connecting the GND pin.
- UART Connection: Connect the module's TXD pin to the RXD pin of your microcontroller or host device, and the module's RXD pin to the TXD pin of your microcontroller or host device.
- Configuration (Optional): The module can be configured using AT commands via the UART interface. Refer to the specific JDY-27 AT command set documentation for detailed configuration options, such as setting master/slave mode, baud rate, and device name.
- Initial Power-On: Apply power. The module should enter its default operating mode (typically broadcast mode for a slave, or scanning for a master, depending on default configuration).
5. Operating Instructions
The JDY-27 module facilitates transparent data transmission over BLE 5.1. Here's how to operate it:
- Transparent Transmission: Once connected to a host device (e.g., a smartphone or another JDY-27 module), any data sent to the module's UART RXD pin will be transmitted wirelessly to the connected device. Conversely, data received wirelessly will be output through the module's UART TXD pin.
- Master-Slave Integration: The module supports both master and slave roles. In slave mode, it advertises its presence and waits for a master device to connect. In master mode, it scans for and connects to slave devices. The specific mode is typically configured via AT commands.
- Data Rates: The module supports high-speed transparent data transmission, up to 12K Byte/S from serial port to mobile phone and 8K Byte/S from mobile phone to serial port.
- Power Modes: The module features various power modes (wake-up, light sleep, deep sleep) to optimize power consumption. These modes can be managed through appropriate commands or by controlling the module's power supply.
6. Maintenance
Proper maintenance ensures the longevity and reliable operation of your JDY-27 module:
- Handling: Handle the module with care to avoid physical damage to components or pins. Avoid touching the antenna area during operation to prevent interference.
- Storage: Store the module in a dry, anti-static environment, away from extreme temperatures and direct sunlight.
- Cleaning: If necessary, gently clean the module with a soft, dry brush or compressed air. Avoid using liquids or harsh chemicals.
- Environmental Conditions: Operate the module within the specified working temperature range of -40℃ to 80℃.
7. Troubleshooting
If you encounter issues with your JDY-27 module, consider the following troubleshooting steps:
- No Power: Verify that the power supply voltage is within the 1.7V to 3.6V range and that the connections to VCC and GND are secure.
- No Communication via UART:
- Check the TXD/RXD connections for correct wiring (module TXD to host RXD, module RXD to host TXD).
- Ensure the baud rate of the module matches that of your host device.
- Confirm that the UART settings (data bits, stop bits, parity) are correctly configured.
- Bluetooth Connection Issues:
- Ensure the module is configured for the correct master or slave role.
- Check for other BLE devices that might be causing interference.
- Verify that the connected device (e.g., smartphone) has Bluetooth enabled and is within the 100-meter transmission range.
- Data Loss/Corruption:
- Confirm that the MTU (Maximum Transmission Unit) settings are appropriate for the connected device (≤247 byte for Android, ≤185 byte for Apple).
- Reduce the data rate if experiencing consistent packet loss, especially over longer distances or in noisy environments.
- Module Not Responding: Try power cycling the module. If the issue persists, re-check all connections and configurations.
8. Warranty and Support
For warranty information or technical support, please refer to the Rakstore official website or contact your point of purchase. Keep your purchase receipt as proof of purchase.