HC-05 Bluetooth Module

HC-05 Bluetooth Module — Master/Slave Serial Wireless

The HC-05 is a Bluetooth SPP (Serial Port Protocol) module supporting both Master and Slave configurations. Based on Bluetooth V2.0+EDR with CSR Bluecore 04 chip and AFH technology, it provides transparent wireless serial communication for Arduino and microcontroller projects.

Key Features

• Bluetooth V2.0+EDR, 3Mbps modulation
• Master and Slave mode configurable via AT commands
• CSR Bluecore 04 chip with AFH (Adaptive Frequency Hopping)
• Operating voltage: 3.3V (5V tolerant input pins)
• Default baud rate: 9600, PIN: 1234
• Range: up to 10 meters
• Compatible with Arduino, AVR, PIC, ARM, ESP32

Applications

• Wireless Arduino serial communication
• Bluetooth remote control projects
• Master-slave wireless sensor networks
• Mobile app to microcontroller communication