HC-05 Bluetooth Serial Module

HC-05 Bluetooth Module In Pakistan TTL Module (With EN Pin) Breakout is the latest Bluetooth wireless serial Module. This version of the popular Bluetooth module uses the HC-05. These modems work as a serial (RX/TX) pipe. Any serial stream from 9600 to 115200bps can be passed seamlessly from your computer to your target. The remote unit can be powered from 3.3V up to 6V for easy battery attachment. All signal pins on the remote unit are 3V-6V tolerant. No level shifting is required.

The HC-05 Bluetooth Serial Module is a widely used Bluetooth 2.0 transceiver designed for full-duplex wireless serial communication. Unlike its counterpart HC-06, the HC-05 supports both master and slave modes, making it ideal for more advanced wireless configurations, including device-to-device communication and multi-module setups.

With a standard 4-pin UART interface (VCC, GND, TX, RX), it easily integrates with platforms like Arduino Uno, Pro Mini, ESP8266, and STM32 boards. Whether you’re building a Bluetooth-controlled robot, a wireless sensor network, or an IoT automation system, the HC-05 offers a robust and customizable connection.

The module operates at 3.3V logic and accepts a 5V input via its onboard voltage regulator. The default baud rate is 9600, but it can be configured up to 1382400 bps using AT commands through a USB to Serial adapter. An onboard LED indicator provides real-time connection status.

✅ Technical Specifications:

• Bluetooth Version: 2.0 + EDR (SPP)

• Operating Modes: Master & Slave (AT-command switchable)

• Working Voltage: 3.6V – 6V (with onboard 3.3V regulator)

• Logic Level: 3.3V (use voltage divider with 5V MCU)

• Default Baud Rate: 9600 bps (configurable via AT commands)

• Communication Protocol: UART (TX/RX serial)

• Range: 10 meters (open area)

• Pinout: VCC, GND, TXD, RXD, EN (Key)

• LED Status: Blinks (unpaired), Steady (paired)

• Module Size: Approx. 28mm x 15mm

🌐 Applications:

• Wireless control of Arduino robots

• Bluetooth-based automation systems

• IoT sensor networks with ESP32 modules

• Communication between two HC-05 modules

• Wireless data logging with mobile apps

• Mobile interface via MIT App Inventor or serial Bluetooth apps

📍 Now available at ElectroWay – Johar Town, Lahore
Visit our store or order online for expert support and quick delivery.

📺 Tutorial:
How to Connect HC-05 Bluetooth Module with Arduino (YouTube)

⚠️ Precautions & Usage Tips:

• Always use a logic level shifter or resistor divider on the RX pin when connecting to 5V microcontrollers.

• Switch to AT Command Mode using the EN (Key) pin for changing the name, password, or baud rate.

• Avoid placing the module near RF or metal sources to prevent interference.

• Ensure correct TX/RX wiring (TX to RX, RX to TX).

Package Includes In HC-05 Bluetooth Module:

• 1 x Bluetooth Transceiver HC-05 TTL Module

Attachments and Links Of HC-05 Bluetooth Module:

Get HC 05 Bluetooth at low price in Karachi, Lahore, Islamabad, Rawalpindi, Peshawar, Multan, Quetta, Faisalabad, Khuzdar, Abbottabad, Taxila, Rahim Yar Khan, Mardan, Jamshoro, Sialkot, Nawabshah, Nowshera, Swabi, Kohat and all over Pakistan. Best Quality Bluetooth HC 05