The HC-05 Bluetooth Serial Communication Module is a wireless communication device that enables data exchange between microcontrollers, computers, and smartphones using Bluetooth technology. It operates through a serial UART interface, making it compatible with development boards such as Arduino. The module typically supports Bluetooth 2.0 + EDR and can operate as either a master or slave device.
The HC-05 is commonly used in electronics projects, robotics, home automation, and wireless monitoring systems. It allows users to send and receive data wirelessly, reducing the need for physical cables. Its typical operating voltage is 3.3V for the Bluetooth module, although many breakout boards accept a 5V supply.