🔍 Product Overview

The HC-12 module is a compact, long-range wireless UART communication module operating in the 433 MHz ISM band. It uses the SI4463 RF transceiver along with an onboard MCU to provide transparent serial data transmission, making it ideal for microcontroller-to-microcontroller wireless links.

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🚀 Why It’s Ideal for Your Projects

• Simple integration – Uses a standard UART interface (TX/RX), making it easy to connect with Arduino, ESP32, STM32, Raspberry Pi, and other MCUs.

• Long-range capability – Achieves communication distances up to around 1 km in open environments with proper antenna setup.

• Configurable performance – Supports multiple channels, power levels, and baud rates via AT commands, allowing fine control over range, speed, and power consumption.

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📝 Key Features

• Operating frequency: Approximately 433.4-473 MHz (commonly 433.4 MHz default).

• Interface: TTL-level UART (VCC, GND, TXD, RXD, SET).

• Transmit power: Up to about 20 dBm, with several adjustable power levels.

• Working modes: FU1, FU2, FU3, and others offering different trade-offs for range, latency, and current usage.

• Power supply: Typically 3.2 V to 5.5 V with sufficient current for RF transmission bursts.

• Antenna support: Spring antenna or external antenna connector for improved performance.

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🎯 Typical Applications

• Wireless sensor networks

• RC vehicles, robotics, and telemetry

• Home automation and IoT devices

• Replacing wired UART links in embedded systems

• Long-distance controller communication

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✅ Why You’ll Love It

The HC-12 module provides a simple, robust, long-range wireless serial solution that is easy to integrate into any microcontroller project. It’s reliable, flexible, and perfect for both beginners and professionals building remote or distributed systems.