HC-05 Bluetooth Serial Module
The HC-05 is a compact Bluetooth module designed to add wireless serial communication to Arduino, microcontroller and embedded-electronics projects. It enables a phone, tablet or computer to exchange data with a project wirelessly through Bluetooth.
It is commonly used for wireless robot control, home automation, sensor monitoring, smart-car projects and Android-based Arduino applications. The module communicates using UART serial pins and can be configured through AT commands when required.
The HC-05 can operate as either a Bluetooth master or slave, making it suitable for connecting two compatible Bluetooth devices or receiving commands from a mobile application.
Key Features
- Bluetooth Classic wireless serial communication
- Compatible with Arduino, ESP boards and other microcontrollers
- Supports master and slave operating modes
- UART interface with TXD and RXD pins
- Typical communication range up to 10 metres in open space
- Configurable using AT commands
- LED status indicator for pairing and connection status
- Compact module for prototypes and embedded projects
Applications
- Bluetooth-controlled robots and cars
- Wireless home-automation projects
- Mobile-controlled Arduino projects
- Sensor-data monitoring
- Wireless switching and control systems
Package Includes
- 1 × HC-05 Bluetooth Module
Note: Use a suitable voltage level for the RX pin when connecting the module to 5 V microcontrollers such as Arduino UNO.
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