HC-05 HC-06 Bluetooth Module – Remote Control & Data Transfer

HC-05 / HC-06 Bluetooth Module for Remote Control & Wireless Data Transfer

Take your electronics projects to the next level with this versatile HC-05 / HC-06 Bluetooth Module. Designed for seamless wireless communication, this compact module enables reliable remote control and data transfer between microcontrollers, Arduino boards, computers, and Bluetooth-enabled devices — all without a tangle of wires.

Whether you're a hobbyist, maker, or embedded systems developer, this module integrates effortlessly into your existing setup and gets you up and running fast. Available in 2 color options to suit your project style.

Key Features

• HC-05 & HC-06 Compatible: Supports both master (HC-05) and slave (HC-06) Bluetooth configurations for flexible project use
• Standard Interface Pins: Exports VCC, GND, TXD, RXD, and a reserved LED status output pin for easy microcontroller integration
• LED Connection Indicator: Onboard LED clearly shows Bluetooth status — flashing indicates no active connection; solid/constant light confirms a live Bluetooth connection with open port
• KEY Pin Functionality: KEY pin is inactive in slave (HC-06) mode; active in master (HC-05) mode for AT command configuration
• Compact & Flexible Form Factor: Ultra-small footprint means it fits into virtually any project enclosure without compromise
• Plug-and-Play Ready: Ready to use straight out of the box — minimal setup required
• Wide Compatibility: Works with Arduino, Raspberry Pi, STM32, and other popular microcontroller platforms
• Stable Wireless Range: Provides a reliable Bluetooth connection for remote control and data streaming applications

Specifications

• Module Type: HC-05 (Master/Slave) / HC-06 (Slave)
• Interface: VCC, GND, TXD, RXD, LED status pin, KEY pin
• Communication Protocol: Bluetooth (Serial UART)
• Color Options: 2 available
• Form Factor: Compact, flexible mounting

What's in the Box

• 1 × HC-05 / HC-06 Bluetooth Module

Who Is This For?

This Bluetooth module is perfect for DIY electronics enthusiasts, engineering students, robotics builders, and professional developers looking for a dependable, easy-to-integrate wireless communication solution. It also makes a great gift for anyone passionate about maker culture and embedded systems.

For more information on wireless communication standards and best practices in electronics design, visit the NIST Wireless Networks Division.

Frequently Asked Questions

Q: What is the HC-05 / HC-06 Bluetooth Module and what does it do?

A: The HC-05 / HC-06 Bluetooth Module is a compact wireless communication module designed for serial data transfer and remote control between microcontrollers and Bluetooth-enabled devices. The HC-06 core exports key interfaces including VCC, GND, TXD, RXD, and a reserved LED status output pin, allowing your microcontroller to detect the Bluetooth connection state. The KEY pin is inactive on HC-06 (slave) mode.

Q: How do I know when the Bluetooth module is connected?

A: The onboard LED provides a clear visual indicator: a flashing LED means no Bluetooth connection is active, while a solid, constant light means Bluetooth is successfully connected and the serial port is open and ready for data transfer.

Q: Is this module compatible with Arduino and Raspberry Pi?

A: Yes! The HC-05 / HC-06 Bluetooth Module is widely compatible with popular development platforms including Arduino, Raspberry Pi, STM32, and other UART-capable microcontrollers. It works as a drop-in wireless serial bridge, making integration into existing projects straightforward and fast.

Q: What is the difference between HC-05 and HC-06?

A: The HC-06 operates exclusively in slave mode, meaning it can only be discovered and connected to by a master device. The HC-05 supports both master and slave modes, giving it greater flexibility for device-to-device communication. Both share the same basic pin layout and UART communication protocol.