HC-12 433 SI4463 Wireless Serial Module

Product Description The HC-12 is a high-performance multichannel wireless serial communication module based on the SI4463 transceiver. It serves as a transparent wireless bridge, allowing you to replace physical wired serial connections with a long-range radio link. Operating in the 433MHz ISM band, it supports 100 communication channels and provides a staggering range of up to 1000 meters. This module is ideal for telemetry, remote sensing, and long-distance robot control. Its ability to work with standard UART protocols makes it compatible with Arduino, Raspberry Pi, and other microcontrollers without the need for complex wireless networking stacks.
Key Features
Long Range Communication: Achieves up to 1km distance in open environments, far exceeding standard Bluetooth or WiFi ranges.
Transparent Transmission: Functions exactly like a wired TTL serial link; whatever data enters the RX pin of one module exits the TX pin of the paired module.
Flexible Configuration: Use AT commands to adjust baud rates, frequency channels, and transmit power to suit your specific project needs.
Low Power Modes: Features multiple idle and sleep modes, making it suitable for battery-powered sensor nodes and remote devices.
Multi-Channel Support: Supports 100 independent channels (spaced at 400kHz) to allow multiple pairs of modules to operate in the same vicinity without interference.

Technical Details
Core Transceiver: Utilizes the Silicon Labs SI4463 high-performance EZRadioPRO chip for superior sensitivity and range.
Operating Current: Consumes approximately 16mA in idle mode and up to 100mA during full-power transmission.
Sensitivity: High receiving sensitivity of -117dBm at low baud rates, ensuring reliable links even at the edge of the range.
Baud Rate Support: Compatible with standard UART speeds ranging from 1200bps to 115200bps (default is 9600bps).
Communication Modes: Offers four modes (FU1, FU2, FU3, FU4) to balance power consumption, latency, and distance.
MCU Interface: Communicates via simple 4-pin interface (VCC, GND, TX, RX) plus a 'SET' pin for AT command mode.
Buffer Size: Includes a 256-byte internal buffer to handle high-speed serial data bursts effectively.
Frequency Stability: Built-in TCXO (Temperature Compensated Crystal Oscillator) ensures frequency stability across varying temperatures.
Filtering: Features high-performance filtering to reject noise from other electronics and environmental RF interference.
Voltage Regulation: On-board LDO regulator allows safe operation from 3.2V up to 5.5V supplies.
Antenna Options: Supplied with a helical spring antenna; also features a pad for an IPEX connector for external high-gain antennas.
Operating Temperature: Industrial grade design rated for stable performance from -40°C to +85°C.
Logic Compatibility: While VCC can handle 5V, the TX/RX pins are 3.3V logic; use a series resistor for 5V systems to ensure long-term reliability.
Packet Handling: Transparently handles preamble, synchronization, and CRC checking internally.
Dimensions: Compact 27.4mm x 13.2mm x 4mm PCB footprint, suitable for embedded applications.