HC-12 433MHz Wireless Communication Module (SI4463) Overview
The HC-12 433MHz wireless module, powered by the SI4463 transceiver chip, is a long distance wireless communication module engineered for reliable, low-power data links. Designed for IoT, robotics, smart systems, and remote sensing, this compact transceiver offers long-range UART communication without complex network infrastructure.
Key Features
- Frequency: 433MHz optimized for long-range links and strong anti-interference performance
- Long Range: Up to 1 km in open space with clear line of sight
- Low Power: Efficient power use for battery-operated devices
- Flexible Interface: UART (3.3V TTL) for simple serial communication with microcontrollers
- Adjustable Settings: Baud rate 1200 to 115200 bps and configurable output power up to 100mW
- Wide Voltage Range: Operates from 3.2V to 5.5V, suitable for common development boards
- Compact Size: 27.4mm x 13.2mm x 4mm for tight installations
Why Choose the HC-12 433MHz Module
This HC-12 module is ideal for hobbyists and professionals who need dependable wireless links for telemetry, control, and sensor data. The SI4463 chipset ensures stable RF performance and strong resistance to interference, while the UART interface makes integration with Arduino and Raspberry Pi fast and straightforward.
Common Applications
- IoT sensor networks and telemetry
- Remote weather stations and environmental monitoring
- Smart irrigation and agricultural automation
- Robotics communication and remote control
- Home and industrial automation alerts
Specifications
| Feature | Details |
|---|---|
| Frequency | 433MHz |
| Chipset | SI4463 |
| Range | Up to 1 KM (open space) |
| Interface | UART (3.3V TTL) |
| Baud Rate | 1200 – 115200 bps |
| Operating Voltage | 3.2V – 5.5V |
| Output Power | Max 100mW |
| Dimensions | 27.4mm x 13.2mm x 4mm |
Integration and Getting Started
Integrating the HC-12 into your project is simple. Use a 3.3V UART connection to connect TX/RX lines to your microcontroller, ensure a common ground, and power the module within the 3.2V to 5.5V range. Adjust baud rate and power settings via AT commands to match range and throughput needs.
Quick Setup Steps
- Connect VCC (3.3V–5.5V) and GND.
- Connect TX of the module to RX of your microcontroller and RX to TX.
- Set matching baud rates on both devices (1200–115200 bps supported).
- Use AT commands to configure channel, power, and mode.
- Test link in open space to verify range and reliability.
Compatibility
The HC-12 module works well with Arduino, ESP8266/ESP32, Raspberry Pi, STM32, and most microcontrollers that support UART serial communication. It is suitable for both prototype development and production deployments that require robust point-to-point RF links.
Tips for Best Performance
- Place modules with clear line of sight for maximum range.
- Use proper antenna placement and grounding to reduce interference.
- Lower output power to conserve battery when full range is not required.
- Test different baud rates to find the optimal balance of speed and reliability.
Included and Important Notes
- Module only; antennas or mounting hardware may not be included depending on the listing.
- Images are for illustration purposes only.
Summary
The HC-12 433MHz wireless transceiver with SI4463 is a powerful, cost-effective solution for long-range, low-power wireless communication. It is tailored for IoT, remote monitoring, robotics, and any project that needs reliable UART-based RF links.
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