HC-05 Wireless Bluetooth Master/Slave Transceiver Module
Key Features
Model: HC-05 Master/Slave Bluetooth Module
Wireless Standard: Bluetooth v2.0 + EDR specification
Operating Voltage: 3.6V to 6V DC (Onboard 3.3V regulator)
Communication Protocol: Standard UART Serial Link (TX / RX pins)
Default Baud Rate: 9600 bps logic speed
The HC-05 is a universal wireless module that establishes a serial data pipeline between a microcontroller and external devices like smartphones or laptops. It is widely used to build mobile apps that steer custom robot vehicles remotely.