This product is shipped from Sydney. All modules are tested before shipping. See the video how we test the module.

ITEM SPECIFICS

Brand: Unbranded / Generic
Type: Wireless Serial Transceiver Module
Model: HC-12
Onboard MCU: STM8S003F3U6
RF Transceiver Chip: Si4463
Frequency Band: 433.4MHz – 473.0MHz (100 Channels)
Operating Voltage: 3.2V – 5.5V DC
Transmit Power: Up to 100mW (20dBm) (Configurable)
Communication Distance: Up to 1,000m (FU3 mode) / Up to 1,800m (FU4 mode)
Interface: UART / TTL (VCC, GND, RXD, TXD, SET)
Quantity: 2 Modules + 2 Helical Spring Antennas

DESCRIPTION

2x HC-12 433MHz SI4463 Wireless Serial Transceiver Modules (STM8S003F3U6)

Upgrade your DIY micro-controller projects with this 2-pack of HC-12 433MHz Wireless Serial Modules. Based on the high-performance Silicon Labs Si4463 RF chip and powered by the STM8S003F3U6 MCU, these modules allow seamless, transparent serial (UART) communication over long distances.

Whether you're building remote sensors, telemetry systems, or long-range wireless links for Arduino or Raspberry Pi, the HC-12 provides a reliable plug-and-play solution.

Key Features:

Long Range Performance: Up to 1,000 meters in open space (FU3 mode at low baud rate) and up to 1,800 meters in long-range mode (FU4).
Transparent Data Transmission: Just send data via standard UART TTL; no complex RF programming required.
100 Channels: Operating range from 433.4MHz to 473.0MHz with 400kHz stepping, allowing multiple pairs to operate without interference.
Configurable via AT Commands: Easily adjust channel, baud rate, power output, and working modes (FU1, FU2, FU3, FU4) via the SET pin.
Dual Antenna Options: Includes 2 helical spring antennas, plus an IPEX (u.FL) connector footprint for external antenna attachment.
3.3V & 5V Logic Compatible: Operates from 3.2V to 5.5V DC, making it easy to interface with Arduino, STM32, ESP8266, ESP32, and Raspberry Pi.

Specifications:

Operating Voltage: 3.2V – 5.5V DC (Minimum supply capacity: 200mA)
Operating Frequency: 433.4MHz – 473.0MHz
Transmitting Power: -1dBm to 20dBm (100mW Max, adjustable)
Receiving Sensitivity: -117dBm to -100dBm
Supported Baud Rates: 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200 bps
Working Modes:
- FU1 (Medium Power Save)
- FU2 (Ultra Power Save)
- FU3 (Default Full Speed / Distance)
- FU4 (Ultra Long Distance)
Board Dimensions: 27.8mm × 14.4mm × 4mm
Pin Pitch: 2.54mm (Standard breadboard header)

Pin Definitions:

VCC: Power Supply (3.2V – 5.5V DC)
GND: Ground
RXD: Serial Data Input (TTL Level)
TXD: Serial Data Output (TTL Level)
SET: Parameter Setting Control Pin (Pull LOW to enter AT command mode)

Package Includes:

2x HC-12 433MHz Wireless Serial Transceiver Modules with antenna