HC-12 Si4438 433MHz Module


Package Includes

  • 1x HC-12 Si4438 433MHz Module
  • 1x 433MHz Helical Antenna

Availability: 4 in stock

The HC-12 module is a dev board for the Si4438 RF transceiver chip. The board includes all the necessary RF circuitry as well as a pre-programmed microcontroller which interfaces directly with the RF transceiver chip, making it easier for you to jump straight in without having to worry about all the nitty-gritty RF control code – all you need are a few simple AT commands and you’ll be up and running in no time.

We purchase all of our HC boards directly from HC Information Technology, so you can rest assured that what you are purchasing is guaranteed genuine.

Features / Specs

  • Dev Board Manufacturer: HC Tech (HC Information Technology)
  • Dev Board Version: v2.6
  • RF Transceiver IC: Silicon Labs Si4438
  • On-Board Microcontroller: ST Micro STM8S003F3P6
  • Supply Voltage: 3.2 – 5.5VDC (Max 4.5VDC is recommended if using the module in higher current states for extended periods)
  • Comms Interface: UART (Default Baud Rate is 9600bps; 8-bit Data; No parity; 1 Stop bit; 3.3V / 5V)
  • Frequency Range: 433.4 ~ 473MHz
  • Transmit Power (Max): +20dBm
  • Transmission Distance: 500m / 1km @ 500bps (Open air / No obstacles)
  • Receiver Sensitivity: -116dBm
  • Transmission Rate (Half Duplex): 4 ~ 5kB/s
  • Sleep Current: 22μA
  • Operating Humidity Range: 10 ~ 90% RH
  • Operating Temperature Range: -25°C to +75°C
  • Dimensions: ~(27.4mm x 13.2mm x 4mm)



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