HC-05 Bluetooth Module – 6-Pin Serial Wireless Transceiver for Arduino & Microcontrollers

Buy HC-05 Bluetooth Module – 6-Pin Serial Wireless Transceiver for Arduino and Embedded Systems

The HC-05 Bluetooth module is a versatile, budget-friendly, and easy-to-use wireless communication component perfect for a wide range of electronics and embedded projects. With its 6-pin configuration, it offers seamless integration with Arduino, Raspberry Pi, ESP8266, ESP32, STM32, AVR, and other microcontroller platforms. This module supports both master and slave modes, enabling it to connect to other Bluetooth devices for full-duplex communication.

✅ Features of HC-05 Bluetooth Module:

• Bluetooth Protocol: V2.0+EDR

• Operating Voltage: 3.6V to 6V (typically 5V for most microcontroller compatibility)

• Default Baud Rate: 9600 bps (configurable)

• Master/Slave Support: Configurable with AT Commands

• Communication Interface: Serial UART

• Operating Range: ~10 meters (line of sight)

• Built-in LED indicator for status

• Compact 6-pin interface with key and enable pins

📦 Pin Description:

1. EN (Enable) – Optional control pin to enable/disable module

2. VCC – Power supply (3.6V–6V)

3. GND – Ground

4. TXD – Transmit data

5. RXD – Receive data

6. STATE – Connection status output

🔧 Applications:

• Wireless Communication Projects

• Home Automation Systems

• Robot Control

• IoT Prototyping

• Wireless Data Logging

• Bluetooth RC Car

• Serial Communication with Smartphones/PC

🚀 Why Buy From Shektronix?

At Shektronix, we deliver authentic, tested, and ready-to-use electronics modules like the HC-05 Bluetooth at competitive prices. Our modules are compatible with popular platforms and come with proper packaging and technical support.

🔄 Related Products (Internal Links):

• Buy Arduino Uno R3 Compatible Board

• Buy NodeMCU ESP8266 Wi-Fi Module

• Buy Breadboard 830 Points

🔗 Helpful External Links:

• Arduino Bluetooth Communication Tutorial (Arduino.cc)

⚙️ How to Configure HC-05 with AT Commands:

To change the baud rate or set the module as master or slave, you can enter the AT mode by holding the key pin high during power-on. Once in AT mode, you can send AT commands through a USB to TTL converter or directly from your Arduino serial monitor.

For instance:

• AT+ROLE=0 → Set to slave

• AT+ROLE=1 → Set to master

• AT+NAME=MyBluetooth → Set module name

🔒 Precautions:

• Always ensure level shifting when using 5V logic microcontrollers. The RX pin of HC-05 operates at 3.3V.

• Do not reverse VCC and GND. Doing so may permanently damage the module.

📜 What’s in the Package:

• 1x HC-05 Bluetooth Module (6-pin)

• Protective ESD-safe packaging

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