HC-05 Bluetooth Serial Module – Wireless UART Communication for Arduino & Embedded Projects
| Feature | Details |
|---|---|
| Module Type | HC-05 Bluetooth Serial Module |
| Communication Protocol | Bluetooth 2.0 + EDR (Classic Bluetooth) |
| Operating Voltage | 3.3V to 6V DC |
| Logic Level | 3.3V TTL (compatible with 5V via voltage divider) |
| Interface | UART (TX, RX, VCC, GND, EN, STATE) |
| Baud Rate | Default 9600 (configurable via AT commands) |
| Range | ~10 meters (open space) |
| Modes | Master / Slave (configurable) |
| LED Indicator | Status LED for connection and pairing |
| Dimensions | ~37mm x 15mm x 5mm |
| Weight | ~5g |
| Configuration | AT command support |
| Applications | Wireless control, data logging, robotics, IoT, home automation |
OVERVIEW
The HC-05 Bluetooth module is a popular and reliable solution for enabling wireless serial communication between microcontrollers and Bluetooth-enabled devices. It supports both master and slave modes, making it versatile for a wide range of applications including robotics, home automation, and IoT systems.
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