Description
The HC-12 Wireless Module is a powerful and versatile 433MHz RF serial communication module designed for long-range, low-power wireless data transmission. It allows microcontrollers like Arduino, ESP32, STM32, and Raspberry Pi to communicate wirelessly over distances of up to 1 kilometer (line of sight).
Think of it as a wireless cable replacement quietly carrying your data through the air while your devices stay physically apart.
With simple UART (serial) communication, the HC-12 is incredibly easy to integrate into your projects without complex networking protocols.
📡 Key Features
- Operates on 433MHz frequency band
- Long-range communication up to 1000 meters (LOS)
- UART serial interface (easy to use)
- Adjustable transmission power and baud rate
- Low power consumption modes
- Built-in spring antenna for improved signal range
- Stable and reliable wireless communication
🔧 Technical Specifications
- Operating Voltage: 3.2V – 5.5V
- Frequency Range: 433.4MHz – 473.0MHz
- Communication Interface: UART (TX/RX)
- Default Baud Rate: 9600 bps (configurable)
- Transmission Power: Up to 100mW (20dBm)
- Communication Distance: Up to 1km (line of sight)
- Sensitivity: -117 dBm
- Modes: FU1, FU2, FU3, FU4 (different power/speed modes)
🧠 Why Choose HC-12?
The HC-12 module shines in scenarios where Bluetooth and WiFi fall short in range. It provides:
- Long-distance communication
- Simple setup (no pairing or network setup)
- Reliable data transfer even in open environments
Perfect for projects where distance matters more than speed.
🔗 Applications
- Wireless sensor networks
- Remote control systems
- Smart agriculture (farm monitoring)
- Home automation systems
- Industrial data transmission
- IoT long-range communication
- Arduino to Arduino wireless link
⚙️ How It Works
The HC-12 uses serial communication (UART):
- Connect TX/RX to your microcontroller
- Send data via serial
- Data is transmitted wirelessly to another HC-12 module
- The receiving module outputs the data via serial
No complex libraries required—just plug, configure, and transmit.
📦 Package Includes
- 1x HC-12 Wireless Module
- 1x Spring Antenna
🚀 Advantages
- Long communication range compared to Bluetooth
- Easy integration with microcontrollers
- Compact and lightweight design
- Multiple power-saving modes
- Cost-effective wireless solution
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