HC-06 Bluetooth Serial Communication Module | Wireless UART Slave Module

The HC-06 Bluetooth Module is a simple and reliable wireless serial communication module designed for Bluetooth 2.0 communication. It works as a slave-only device, enabling microcontrollers, development boards, and embedded systems to communicate wirelessly using UART serial. With built-in firmware and configurable baud rates, the HC-06 is widely used in robotics, DIY electronics, IoT projects, and wireless data logging applications.

Specifications

• Bluetooth: 2.0 + EDR
• Role: Slave only (cannot act as a master)
• Communication: UART (TTL serial)
• Default baud rate: 9600 bps
• Default PIN: 1234 (sometimes 0000)
• Range: About 10 meters
• Operating voltage (breakout): Typically 3.6–6 V input, with 3.3 V logic on the module.