HC-05 Bluetooth Module

GST

The HC-05 Bluetooth Module enables wireless communication between a microcontroller and smartphones or computers. It works easily with boards like Arduino Uno R3 and Arduino Nano.

The HC-05 is a classic Bluetooth (Bluetooth 2.0 + EDR) module used for serial communication (UART). It allows you to send and receive data wirelessly between a microcontroller and devices such as Android phones, laptops, or other Bluetooth modules.

The module can operate in Master or Slave mode, making it flexible for different communication setups. It is configured using AT commands, allowing control over baud rate, device name, and pairing settings.

This module is widely used in robotics control, home automation, wireless data logging, and IoT projects.

Key Features

Bluetooth 2.0 + EDR communication
Supports Master and Slave modes
UART interface (TX/RX communication)
Easy configuration via AT commands
Range up to ~10 meters
Compatible with Arduino and other microcontrollers

Technical Specifications

Parameter	Value
Communication	Bluetooth (Serial UART)
Bluetooth Version	2.0 + EDR
Operating Voltage	3.6V – 6V (module)
Logic Level	3.3V (TX/RX)
Range	~10 meters
Default Baud Rate	9600 bps