Description
📡 HC-05 Bluetooth Module – Reliable Wireless Communication for Your Projects
Elevate your wireless connectivity with the HC-05 Bluetooth Module—a compact, easy-to-use solution for creating transparent serial links in embedded systems. Whether you’re working on industrial control, wireless data transfer, or microcontroller-based applications, the HC-05 delivers stable Bluetooth V2.0+EDR performance with data rates up to 3Mbps.
🔧 Key Features
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Flexible Configuration
Operates in both master and slave modes, allowing seamless integration into diverse setups. -
Bluetooth V2.0+EDR
Works on the 2.4GHz ISM band, offering fast and stable data transfer using Enhanced Data Rate. -
Compact Footprint
Just 12.7mm x 27mm, making it perfect for space-limited applications. -
Reliable Serial Communication
Supports baud rates from 9600 to 115200bps for compatibility with most MCUs and devices. -
Auto-Pairing & Auto-Reconnect
Default PIN “0000” with auto-connect and auto-reconnect functionality within 30 minutes of disconnection. -
LED Indicators
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🔵 Blue LED: Blinks twice per second when disconnected
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🔴🔵 Red & Blue LEDs: Blink once every 2 seconds when paired
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Wide Voltage Support
Operates from 3.3V to 6V, suitable for various power configurations including battery-powered devices.
📊 Technical Specifications
| Parameter | Details |
|---|---|
| Bluetooth Protocol | Bluetooth v2.0 + EDR |
| Frequency | 2.4GHz ISM Band |
| Modulation | GFSK (Gaussian Frequency Shift Keying) |
| Transmission Power | ≤4dBm (Class 2) |
| Sensitivity | ≤ -84dBm @ 0.1% BER |
| Asynchronous Speed | Max 2.1Mbps / Typical 160kbps |
| Synchronous Speed | 1Mbps (up/down) |
| Security | Authentication and encryption |
| Bluetooth Profile | Serial Port Profile (SPP) |
| Default Baud Rate | 38400bps (changeable) |
| Supported Baud Rates | 9600 to 460800bps |
| Auto-Pair PIN | “0000” |
| Connection Pin | PIO1 (High = Connected, Low = Not) |
| Power Supply | +3.3VDC (~50mA) |
| Operating Temp | -20°C to +75°C |
| Module Size | 26.9mm x 13mm x 2.2mm |
📐 Common Applications
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Wireless Serial Communication
Replace traditional wired connections in embedded systems. -
Industrial Automation
Add Bluetooth capability to PLCs and monitoring systems. -
Microcontroller Projects
Interface with Arduino, ESP32, Raspberry Pi, and more. -
IoT & Smart Devices
Enable wireless data transfer in connected environments.
📦 Package Includes
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1 × HC-05 Bluetooth Module
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Pre-soldered header or cable (based on product variant)
💡 Why Choose the HC-05?
The HC-05 strikes the perfect balance between performance, cost-efficiency, and ease of use. Whether you’re a hobbyist, student, or engineer, this module simplifies Bluetooth integration, allowing you to focus on creating innovative wireless solutions.
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