433MHz HC-12 SI4463 Wireless Serial Communication Module – 1000m Long Range, Bluetooth Alternative (Backward Compatible)

Description

Description

The HC-12 433MHz Wireless Serial Communication Module is a powerful, long-range transceiver that offers an exceptional alternative to Bluetooth for projects requiring distance and reliability. Built around the high-performance SI4463 RF chip, this module provides a robust wireless serial link of up to 1000 meters in open areas, making it ideal for applications where Wi-Fi and standard Bluetooth fall short.

Unlike simple RF modules that require complex low-level programming, the HC-12 acts as a transparent wireless serial cable. It features a built-in MCU that handles all RF protocol processing automatically. Data sent into the module’s UART port is transmitted wirelessly and appears instantly at the UART port of another HC-12 module on the same channel, with no RF programming required by your microcontroller.

The module offers exceptional flexibility with 100 selectable channels in the 433.4-473.0 MHz band and multiple operating modes that allow you to balance power consumption against communication distance. Whether you need ultra-low power operation for battery-powered sensors or maximum range for remote control applications, the HC-12 can be configured to meet your needs using simple AT commands.

Important Compatibility Note: The HC-12 uses a different protocol than the HC-11 module and is not compatible with it. For reliable communication, all modules in your network must be HC-12 modules. The module is also backward compatible with earlier versions of the HC-12, ensuring seamless integration with existing deployments.

Whether you need to build a remote weather station, control a device across a farm, create a wireless serial link between buildings, or replace wired connections with a reliable long-range alternative, the HC-12 delivers exceptional performance in a compact, easy-to-use package.

Key Features

• 1000m Long Range – Up to 1 kilometer communication distance in open areas (at 5000bps air baud rate)

• 100 Selectable Channels – 433.4–473.0 MHz frequency range with 400KHz channel spacing

• Transparent Serial Transmission – Built-in MCU handles all RF protocols; works like a wireless serial cable

• Adjustable Transmit Power – 8 power levels from -1dBm to +20dBm (100mW max)

• Multiple Operating Modes – FU1 (3.6mA idle), FU2 (80µA idle), FU3 (16mA idle), FU4 (long-range)

• Wide Voltage Range – 3.2V–5.5V DC, compatible with both 3.3V and 5V microcontrollers

• Configurable via AT Commands – Set channel, baud rate, power level, and operating mode

• High Receiver Sensitivity – -117dBm sensitivity ensures reliable reception even in challenging conditions

• Wide Baud Rate Support – UART speeds from 1200 bps to 115200 bps

• Industrial Temperature Range – -40°C to +85°C for reliable operation in harsh environments

Technical Parameters