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HC-05 Bluetooth Module
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Product Specifications
| Specification | Details |
|---|---|
| Operating Voltage | 3.6V – 6V (typically 5V) |
| Operating Current | 30 mA (active), 1–2 mA (idle) |
| Communication Protocol | UART (TTL) |
| Baud Rate (Default) | 9600 bps |
| Bluetooth Standard | V2.0+EDR (Enhanced Data Rate) |
| Frequency | 2.4 GHz ISM band |
| Range | Up to 10 meters |
| Modes | Master/Slave (configurable) |
| Dimensions | Approx. 30mm x 14mm x 2.2mm |
Key Features
- Supports both Master and Slave modes for flexible communication.
- Easy UART serial interface for microcontrollers and Arduino projects.
- Configurable baud rate and settings using AT commands.
- Low power consumption with idle and sleep modes.
- Reliable wireless data transmission up to 10 meters.
- Compact and lightweight design for embedded projects.
Applications
- Wireless communication between Arduino or microcontroller boards.
- Bluetooth-based robot control systems.
- Home automation projects.
- Wireless data logging and monitoring.
- Remote device control using smartphones or PCs (with Bluetooth).
- IoT projects requiring short-range connectivity.
Frequently Asked Questions
The HC-05 supports both master and slave modes, while the HC-06 works only in slave mode. This makes HC-05 more versatile.
It can communicate reliably up to 10 meters in open space without obstacles.
For most microcontroller applications, no drivers are needed. However, for PC connections via USB-to-serial adapters, drivers may be required.
Yes, it can connect to smartphones, tablets, and laptops that support Bluetooth V2.0+EDR.
Yes, it can easily be interfaced with Arduino, Raspberry Pi, ESP32, and other microcontrollers using UART.
