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433Mhz Serial RF Module HC-12 (1000M)

433Mhz Serial RF Module HC-12 (1000M)

The HC-12 is a multi-channel embedded wireless serial port module operating in the 433.4–473.0 MHz band. With up to 100 mW (20 dBm) transmit power and −117 dBm receiving sensitivity, it achieves communication distances of up to 1,000 metres in open space at 5,000 bps air baud rate.

A built-in MCU handles all RF protocol processing, allowing transparent serial data transmission — simply send data to the module's UART and it appears at the other end. Configuration is done via AT commands, with three operating modes (FU1, FU2, FU3) offering different power/speed trade-offs. A minimum of two modules is required for communication.

Key Features

  • 1,000 m Range – Open-space communication at 5,000 bps air baud rate
  • 100 Channels – 433.4–473.0 MHz with 400 kHz channel spacing
  • Transparent Serial Transmission – Built-in MCU handles RF protocol; no external programming required
  • UART/TTL Interface – Serial baud rates from 1.2 kbps to 115.2 kbps (default 9.6 kbps)
  • Adjustable TX Power – 8 power levels from −1 dBm to +20 dBm (100 mW max)
  • Three Operating Modes – FU1 (80 µA idle), FU2 (3.6 mA idle), FU3 (16 mA idle) for power/performance trade-offs
  • Wide Supply Voltage – 3.2–5.5V DC, compatible with both 3.3V and 5V microcontrollers
  • AT Command Configuration – Set channel, baud rate, power level, and operating mode
  • No Packet Size Limit – Unlimited bytes per transmission
  • Wide Temperature Range – −40°C to +85°C

Specifications

  • Frequency Range: 433.4–473.0 MHz (100 channels)
  • Supply Voltage: 3.2–5.5V DC
  • Communication Distance: Up to 1,000 m (open space)
  • Serial Baud Rate: 1.2–115.2 kbps (default 9.6 kbps)
  • Receiving Sensitivity: −117 dBm to −100 dBm
  • Transmit Power: −1 dBm to +20 dBm (8 levels)
  • Max TX Current: 100 mA
  • Interface: UART/TTL
  • Operating Temperature: −40°C to +85°C
  • Dimensions: 27.8 × 14.4 × 4 mm

Ideal For

  • Long-range wireless sensor networks
  • Remote data logging and telemetry
  • Arduino and microcontroller wireless serial links
  • Home automation and IoT gateways
  • Replacing wired serial connections over distance

Package Contents

  • 1× HC-12 433 MHz Serial RF Module
Note: A minimum of two HC-12 modules is required for communication. An antenna must be soldered to the module for proper operation. The HC-12 is not compatible with the HC-11 module.

The 433Mhz Serial RF Module HC-12 (1000M) appears in the following collections:

SKU EC-WHC0012RF
by Elecrow