The HC-06 Bluetooth module is a cost-effective, easy-to-use module for wireless serial communication between microcontrollers like Arduino, ESP32, or Raspberry Pi and other Bluetooth-enabled devices (e.g., smartphones, PCs). It uses Bluetooth 2.0 and supports only slave mode, making it ideal for receiving commands or data wirelessly.

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Key Features:

✔ Bluetooth Protocol: Bluetooth 2.0 + EDR
✔ Operating Voltage: 3.3V logic (5V tolerant with onboard regulator)
✔ Baud Rate: Default 9600 (can be changed via AT commands)
✔ Communication Interface: UART (TX, RX, GND, VCC)
✔ Slave Mode Only – Cannot initiate connection
✔ Range: Up to 10 meters (clear line of sight)
✔ Onboard LED indicator for connection status

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Applications:

🔹 Wireless control of Arduino/ESP32 projects
🔹 Home automation systems
🔹 Robot control via mobile apps
🔹 Wireless sensor data logging
🔹 Serial communication without USB cables