- The HC-04 Bluetooth Module (similar to HC-05) is a reliable and low-cost wireless communication module used to establish serial Bluetooth connectivity between microcontrollers and devices like smartphones or laptops.
- It operates on UART (Serial Communication) and allows easy data transfer for controlling and monitoring projects wirelessly. This module is widely used in Arduino-based robotics, automation systems, and mobile-controlled applications.
- With simple AT command configuration and stable performance, it is an excellent choice for students, hobbyists, and developers working on wireless communication projects.
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Description
Specifications
| Specification | Details |
|---|---|
| Model | HC-04 / HC-05 Compatible |
| Communication | Bluetooth Serial (UART) |
| Operating Voltage | 3.3V – 5V |
| Frequency | 2.4 GHz ISM band |
| Range | Up to 10 meters (approx.) |
| Default Baud Rate | 9600 |
| Modes | Master / Slave (configurable) |
| Interface | TX, RX, VCC, GND pins |
Features
- Easy wireless serial communication
- Supports Master and Slave modes
- Simple AT command configuration
- Stable and reliable connection
- Compatible with Arduino and other microcontrollers
Applications
- Bluetooth-controlled robots
- Home automation systems
- Wireless data transfer projects
- Mobile app-controlled devices
- Smart IoT prototypes
Why choose?
- Low-cost wireless solution
- Easy to use for beginners
- No WiFi required (Bluetooth-based control)
- Widely used in educational projects
- Perfect for mobile-controlled robotics
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