




HC-05 Bluetooth Module (Wireless Serial Communication)
- Based on the HC-05 Bluetooth 2.0+EDR module with built-in antenna
- Supports Serial Port Profile (SPP) for wireless UART communication
- Default baud rate of 9600 bps, configurable via AT commands
- Operates at 3.6V–6V (logic level 3.3V)
- Works with Arduino, Raspberry Pi, and STM32 boards
- Ideal for IoT, robotics, and wireless data transmission projects
Product Details
HC-05 Bluetooth Module (Wireless Serial Communication)
The HC-05 Bluetooth Module is a popular and affordable solution for adding wireless serial communication to microcontroller-based systems. It supports Bluetooth version 2.0 + EDR (Enhanced Data Rate) and operates using the Serial Port Profile (SPP), enabling devices to communicate wirelessly over UART.
This module can be configured as a master or slave using simple AT commands, making it perfect for projects requiring Bluetooth connectivity such as wireless sensors, robots, or embedded control systems.
🔧 Key Features
- Fully compliant with Bluetooth v2.0 + EDR standard.
- Supports UART (Serial TTL) communication at default 9600 bps.
- Operates in Master or Slave mode via AT command configuration.
- Built-in PCB antenna for reliable wireless performance.
- Supports up to 10 m range (Class 2 device).
- Works on 3.6–6V supply (internal 3.3V regulator).
- Simple 4-pin interface (VCC, GND, TXD, RXD) for microcontroller connection.
💡 Applications
- Wireless data logging from sensors and devices.
- Bluetooth-controlled robots and automation systems.
- IoT projects requiring short-range wireless communication.
- Serial cable replacement in embedded systems.
⚙️ Technical Specifications
| Bluetooth Version | v2.0 + EDR |
| Protocol | Bluetooth SPP (Serial Port Profile) |
| Operating Voltage | 3.6V – 6V DC |
| Logic Level | 3.3V |
| Default Baud Rate | 9600 bps (Configurable via AT commands) |
| Communication Interface | UART (TX, RX) |
| Range | ~10 meters (Class 2) |
| Modulation | GFSK (Gaussian Frequency Shift Keying) |
| Power Consumption | 30–40 mA (Typical) |
| Operating Frequency | 2.4 GHz ISM Band |
| Dimensions | 37 mm × 15 mm × 5 mm |
| Weight | ~5 g |
📦 Package Includes
- 1 × HC-05 Bluetooth Module (Wireless Serial Communication)
✅ Why Choose This Module?
- Reliable and affordable wireless UART communication solution.
- Easy to use with Arduino and other microcontrollers.
- Supports both master and slave roles for flexible connectivity.
- Wide community support and available example codes.
Specifications
- TypeBluetooth Module
- Operating Voltage3.3V – 5V
- Temperature Range0°C – 50°C
- InterfaceUART
















