Bluetooth Module HC-05

Bluetooth Module HC-05 – Connect Projects Wirelessly

The Bluetooth Module HC-05 is a powerful tool for wireless communication between microcontrollers and Bluetooth-enabled devices. Whether you’re automating your home, building a robot, or controlling a smart device — the HC-05 module helps you get there without messy wires or complicated setup.

What is the HC-05 Bluetooth Module?

The HC-05 module is a class 2 Bluetooth serial transceiver designed for wireless communication using the Serial Port Profile (SPP). It works in both Master and Slave modes, which makes it more versatile than the HC-06. From beginner-friendly projects to industrial prototypes, this module handles it all.

Key Features of Bluetooth Module HC-05

• Supports Master & Slave modes

• Built-in AT Command Mode for configuration

• Range: Up to 10 meters (line of sight)

• Fully compatible with Arduino, STM32, and more

• Easy pairing with Android and Windows

• Default Baud Rate: 9600 (can be configured)

• Compact, lightweight design with onboard LED indicators

Why Choose HC-05 for Wireless Communication?

• Flexible Use Cases: Control, monitor, or log data — all wirelessly

• Easy to Program: Seamless integration with Arduino IDE and serial tools

• Stable and Fast: Smooth two-way data transfer with minimal delay

• Perfect for DIY and Commercial Use: Robotics, home automation, smart lighting, wireless monitoring

• Highly Compatible: Works with laptops, PCs, and smartphones

Technical Specifications – HC-05 Datasheet Summary

HC-05 Bluetooth Module Applications

• Arduino Bluetooth Projects

• Wireless Sensor Networks

• Home and Industrial Automation

• Remote Control of Electronics

• Robot-to-Controller Communication

• Wireless Data Logging

Story: Why HC-05 Makes Projects Come Alive

Imagine you’re in your workspace in Islamabad, building a smart irrigation system. You don’t want to run wires across the garden or keep pulling out cables for programming. With the HC-05 Bluetooth module, your phone becomes your controller. Send commands, get feedback, update settings — all without touching the hardware.

That’s the freedom HC-05 delivers.

HC-05 Connections and Pinout

• VCC – 3.3V–6V supply

• GND – Ground

• TXD – Transmit Data (connect to RX of MCU)

• RXD – Receive Data (connect to TX of MCU)

• KEY / EN – Enters AT mode when pulled high before power-up

• STATE – Shows connection status

Quick to wire, quick to go live.

Setting Up the HC-05 Bluetooth Module

Using AT commands, you can configure your module’s role (Master/Slave), set baud rate, rename the device, and add password security. Many developers in Pakistan use this to connect multiple Arduino units or build multi-device networks with stable communication.

HC-05 vs HC-06 – Why HC-05 Wins for Versatility

If you want a module that works as both Master and Slave, then HC-05 is the right choice. It’s especially useful for two-way communication projects and supports greater control through AT commands than HC-06.

Why Buy Bluetooth HC-05 Module from Colgroad?

• Affordable pricing and fast delivery in Islamabad

• 100% genuine components tested before shipment

• Technical support for setup and tutorials

• Ideal for students, engineers, and hobbyists

Order the HC-05 Bluetooth Module Today

Bring wireless communication to your microcontroller. With the HC-05 Bluetooth module, control and monitor your electronics from your phone, laptop, or other smart devices. Order now and make your project smarter, simpler, and wireless.