HC-05 Bluetooth Module

HC-05 based on Bluetooth SPP (Serial Port Protocol) module designed as Wireless Serial Communication allows use with any microcontroller.  It supports the UART protocol for easy transfer and receives data wirelessly. This module is the most demanding and popular due to its low cost and extremely high features.

This module works as both Master and Slave Mode and easy switchable between these two modes. By default, Slave mode is configured. And the configured Modes changed using AT Commands. While working in slave mode, HC-05 cannot initiate a connection to another Bluetooth device but can accept connections. Whereas in Master mode, it initiates a connection to other devices.

This serial port Bluetooth module features fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with a complete 2.4GHz radio transceiver and baseband. Moreover, It supports CSR Bluecore 04‐External single-chip Bluetooth system with CMOS technology and with AFH (Adaptive Frequency Hopping Feature). The HC-05 is a 6 pin wireless serial communication device that is capable to add two-way (full-duplex) wireless functionality to our projects. The module communicates using the USART protocol at a baud rate of 9600. Hence it is easy to interface with any microcontroller that supports USART. The onboard LED present on the board indicates the connection status, whether the Bluetooth is connected or not. This red LED blinks continuously in a periodic manner before connecting to the module. When connected to any other Bluetooth device, its blinking slows down to two seconds.

APPLICATIONS:

• Wireless communication between two microcontrollers
• Communicate with Laptop, Desktops and mobile phones
• Data Logging application
• Consumer applications
• Wireless Robots
• Home Automation