HC-12 433Mhz SI4463 Wireless Module 1000m Replace Bluetooth

Product Overview: HC-12 433MHz Wireless Serial Transceiver

The HC-12 is a long-range, high-performance wireless serial communication module based on the Si4463 transceiver chip. It is designed to act as a “wireless bridge,” allowing two microcontrollers (like your Arduino or ESP32) to communicate over long distances just as they would with a wired serial (TTL) connection. Marketed as a superior alternative to Bluetooth for non-audio tasks, the HC-12 offers a massive 1,000-meter range in open space, making it ideal for remote-controlled cars, long-distance telemetry, and agricultural monitoring.

Technical Specifications

Key Features

• Long-Distance Transmission: Achieves up to 1km range, far exceeding the 10-30m limit of standard Bluetooth (HC-05/06) modules.

• Transparent Transmission: Once configured, it functions like a physical wire. Data sent into the TX pin of one module instantly appears at the RX pin of the other.

• Wide Frequency Selection: Supports 100 channels with 400kHz spacing, allowing multiple pairs of modules to operate in the same area without interference.

• Low Power Modes: Features four specialized power modes (FU1, FU2, FU3, FU4) to balance range and power consumption (ranging from 80µA in deep sleep to 100mA during transmission).

• Flexible Configuration: Use AT Commands to change the baud rate, frequency channel, and transmitting power on the fly.

Comparison: HC-12 vs. Bluetooth (HC-05)