HC-12 433MHz Long Range Wireless Serial Module with Spring Antenna

HC-12 433MHz Long Range Wireless Serial Module

The HC-12 is a powerful 433MHz wireless serial communication module capable of transmitting data over distances up to 1800 meters in open air. With a simple UART interface and AT command configuration, it's a drop-in replacement for wired serial connections in Arduino, ESP32, and microcontroller projects.

Key Features

• 433MHz ISM band wireless communication
• Range: up to 1800m (open air, FU1 mode)
• Simple UART serial interface (TX/RX)
• AT command configuration for baud rate, channel, and power
• 20 selectable channels (433.4MHz – 473.0MHz)
• Includes spring coil antenna for extended range
• Gold IPEX/U.FL connector for external antenna
• Blue PCB with compact SMD design

Specifications

• Frequency: 433MHz
• Range: Up to 1800m (open air)
• Interface: UART (TTL 3.3V/5V compatible)
• Baud Rate: 1200 – 115200 bps
• Operating Voltage: 3.2V – 5.5V
• Transmit Power: -1dBm – 20dBm (adjustable)
• Channels: 20
• Antenna: Spring coil (included)

Compatible With

• Arduino UNO, Nano, Mega
• ESP8266 / ESP32
• Raspberry Pi
• Any UART-capable microcontroller