Description
Product Description
The HC-05 (Type-B) is a versatile and widely-used Bluetooth 2.0+EDR (Enhanced Data Rate) module designed for transparent wireless serial communication. Unlike the HC-06 module, which can only act as a “Slave,” the HC-05 is a Master/Slave dual-role module. This means it can either wait for a connection from a phone/PC or proactively initiate a connection to another Bluetooth device (such as another HC-05).
The “Type-B” version features a dedicated onboard button for easier access to AT Command Mode. By holding the button during power-up, users can easily configure settings such as device name, pairing PIN, baud rate, and operational role (Master/Slave). Mounted on a 6-pin breakout board, it includes a built-in voltage regulator and level shifting, making it 5V-tolerant and ideal for seamless integration with Arduino, Raspberry Pi, and industrial PLC systems.
Key Features
- Master/Slave Switching: Fully configurable via AT commands to act as either a central controller (Master) or a peripheral device (Slave).
- Onboard Configuration Button: Simplifies the process of entering “Command Mode” for setup without needing complex jumper wiring.
- Transparent Transmission: Acts as a wireless serial cable; once paired, data sent to the RX pin appears at the connected device’s TX pin.
- CSR BlueCore4 Technology: High-performance, low-power 2.4GHz radio frequency with external 8Mbit Flash memory.
- Wide Voltage Compatibility: The integrated baseboard supports a 3.6V to 6V power input.
- Status LED Indicator: Built-in LED provides visual feedback for pairing status (fast flash), AT mode (slow flash), and connected status (double flash).
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