Description

Wireless Transceiver Serial UART (1km Range) – HC-12 SI4438 Module

The HC-12 SI4438 Wireless Transceiver is a long-range communication module designed for reliable, low-power, and high-performance serial data transmission. With a communication range of up to 1 kilometer in open space, this compact device is an ideal solution for engineers, hobbyists, and IoT developers who require stable wireless connectivity between microcontrollers or embedded systems.

Operating on the 433 MHz frequency band, this module provides robust data transfer while maintaining low interference, making it perfect for projects that demand secure and consistent communication. Whether you’re building a remote monitoring system, wireless sensor network, or automation project, the HC-12 offers both flexibility and efficiency.

🔧 Key Features

• Long-Range Communication – Up to 1km in open space.

• UART Interface – Simple serial communication with microcontrollers and development boards.

• Adjustable Baud Rate – Supports multiple data rates for flexible project requirements.

• Low Power Consumption – Energy-efficient operation suitable for battery-powered projects.

• Compact Size – Easy to integrate into small electronics projects.

• High Stability – Built with the SI4438 chip for consistent performance.

• Multiple Channels – Supports up to 100 communication channels to minimize interference.

⚡ Technical Specifications

• Model: HC-12 (SI4438)

• Operating Frequency: 433.4–473.0 MHz

• Communication Range: Up to 1km (open environment)

• Interface: UART (serial, TTL level)

• Baud Rate: 1200 to 115200 bps (default 9600 bps)

• Modulation Type: GFSK

• Supply Voltage: 3.2V – 5.5V

• Transmit Power: Up to 100mW (20dBm)

• Antenna: External antenna included for maximum performance

• Dimensions: Compact PCB design for easy integration

🌍 Applications

The HC-12 module is a flexible solution for a wide range of projects that need reliable wireless communication:

1. IoT Networks – Connect sensors and devices wirelessly for smart home or smart city projects.

2. Remote Monitoring Systems – Collect and transmit data from remote locations such as farms, weather stations, or industrial plants.

3. Robotics – Enable wireless control and communication between robots and controllers.

4. Wireless Data Logging – Send real-time sensor data to a central hub without physical wiring.

5. Automation – Integrate into smart agriculture, greenhouse monitoring, or industrial automation setups.

6. Education – Excellent for students and researchers learning about wireless communication protocols.

🔒 Reliability and Performance

One of the standout advantages of the HC-12 SI4438 module is its long-range communication combined with low power consumption. This makes it particularly useful for projects where devices are spread out over a wide area but must maintain efficient energy usage.

The built-in error detection mechanism ensures that data packets are transmitted and received accurately, reducing the chances of data loss even in noisy environments. Additionally, its support for multiple channels means you can avoid interference by selecting the most stable frequency for your project.

✅ Why Choose This Wireless UART Module?

• Simple serial interface makes it easy to use with Arduino, ESP8266, ESP32, STM32, Raspberry Pi, and other microcontrollers.

• Long-distance capability without the need for Wi-Fi or GSM.

• Reliable communication in both DIY and professional applications.

• Affordable, compact, and easy to implement.

Conclusion

The HC-12 SI4438 wireless transceiver module is a powerful and dependable choice for anyone needing long-range UART communication. With its 1km range, low power operation, and high stability, it’s suitable for IoT projects, automation, robotics, and educational purposes. Its compatibility with a wide range of development boards makes it an excellent addition to your electronics toolkit.

Whether you are creating a wireless sensor network, developing a remote control system, or simply learning about RF communication, this module provides the perfect balance of performance, affordability, and ease of use.

Data Sheet