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About the Module

About the Module

Bluetooth Module :

HC‐05 module is an easy-to-use Bluetooth SPP (Serial Port Protocol) module, designed for a transparent wireless serial connection setup. The HC-05 Bluetooth Module has 6 pins. They are as follows:

  • ENABLE: When enable is pulled LOW, the module is disabled which means the module will not turn on and it fails to communicate.

  • VCC: Supply Voltage 3.3V to 5V

  • GND: Ground pin.

  • TXD & RXD: These two pins act as a UART interface for communication.

  • STATE: It acts as a status indicator.

  • BUTTON SWITCH: This is used to switch the module into AT command mode. To enable AT command mode, press the button switch for a second.