HC-12 433MHz long-range wireless serial transceiver module with coil antenna for Arduino Raspberry Pi ESP32

HC-12 433MHz Long-Range Wireless Serial Transceiver Module (SI4438) for Arduino, Raspberry Pi & ESP32

SKU AA485

$12.99 USD Shipping & tax calculated at checkout
In stock· Order by 3pm ET and it ships today

HC-12 433MHz long-range UART wireless serial transceiver with SI4438 RF chip for Arduino, Raspberry Pi and ESP32; ideal for telemetry, remote sensors, robotics, home automation and prototyping.

  • Free Ground Shipping U.S. orders $35+
  • Ships from USA Domestic fulfillment
  • 30-day returns Free defect replacement
  • 7-day support Fast email replies
Frequently bought together
HC-12 433MHz long-range wireless serial transceiver module with coil antenna for Arduino Raspberry Pi ESP32 HC-12 433MHz Long-Range Wireless Serial Transceiver Module (SI4438) for Arduino, Raspberry Pi & ESP32No reviews yet $12.99 This item
ESP32-CAM 4WD smart robot car kit with WiFi app control and yellow wheels on product packaging ESP32-CAM 4WD Smart Robot Car Kit with WiFi App Control (Battery Not Included)No reviews yet $49.99
Compact blue RC servo tester and CCPM consistency checker with yellow adjustment knob and multiple pin connectors RC Servo Tester & CCPM Consistency CheckerNo reviews yet $7.99
N20 micro metal gear motor with visible brass gears and silver motor casing for robotics and DIY projects N20 Micro Metal Gear Motor 12V 100RPM for Robotics & DIY ProjectsNo reviews yet $8.99
Total for 4 items
$79.96

Products related to this item

MQ-7 carbon monoxide gas sensor module with blue PCB and metal mesh sensor for Arduino and ESP32
No reviews yetMQ-7 Carbon Monoxide (CO) Gas Sensor Module for Arduino, Raspberry Pi & ESP32 $6.99
MP3-TF-16P mini MP3 player module with TF card slot and pin headers for Arduino and Raspberry Pi
No reviews yetMP3-TF-16P Mini MP3 Player Module with TF Card Slot for Arduino & Raspberry Pi $6.99
Top view of MCP23017 pre-soldered I2C 16-bit I/O port expander module for Arduino Raspberry Pi ESP32
No reviews yetMCP23017 Pre-Soldered I2C 16-Bit I/O Port Expander for Arduino, Raspberry Pi & ESP32 $5.99
NEO-M8N GPS module with antenna and battery for Arduino Raspberry Pi and ESP32 projects
No reviews yetNEO-M8N GPS Module with Antenna & Battery for Arduino, Raspberry Pi & ESP32 $16.99
Pan-tilt servo bracket kit components including black plastic mounts, servo arms, screws, nuts, and brass inserts for SG90 and MG90S servos
No reviews yetPan-Tilt Servo Bracket Kit for SG90 & MG90S Micro Servos $3.99
VL53L1X Pre-Soldered Time-of-Flight Laser Distance Sensor 400cm for Arduino, Raspberry Pi & ESP32
No reviews yetVL53L1X Pre-Soldered Time-of-Flight Laser Distance Sensor 400cm for Arduino, Raspberry Pi & ESP32 $14.99

Overview

Product Overview

The HC-12 433MHz wireless serial transceiver module is a long-range UART data link built around the SI4438 RF chip, letting Arduino, Raspberry Pi, ESP32, and other microcontrollers send and receive serial data over 433MHz without a separate networking stack. Ideal for remote sensors, robotics, home automation, telemetry, and general prototyping, the HC-12 creates transparent point-to-point or controller-to-device links for commands, status updates, and data logging. Use it to replace short wired serial connections with a compact 433MHz transceiver that integrates easily with projects using standard TX/RX serial interfaces.

Questions & answers

Frequently asked questions

Yes, the HC-12 transceiver module is compatible with Raspberry Pi, Arduino, ESP32, and other microcontrollers that support standard TX/RX serial interfaces.
The HC-12 module comes with pre-soldered pins, enabling straightforward integration. Connect it to your microcontroller using TX/RX pins, configure the desired baud rate, and it's ready to establish a wireless serial link.
The HC-12 typically supports standard TTL voltage levels (3.3V or 5V) for serial communication, making it suitable for most microcontroller platforms, including Arduino, Raspberry Pi, and ESP32.
A common use case for the HC-12 module is in home automation systems, where it provides a wireless link to control and monitor sensors and devices over long distances without the need for a network infrastructure.
Ensure connections to the TX/RX pins are secure and configured correctly at both ends. Verify matching baud rates and check for any wireless interference. If issues persist, ShillehTek offers a 30-day return policy.

Have other questions?

Chat with our US-based team — we usually reply fast.

What's included

Features & Specs

RF ChipsetBuilt around the SI4438 RF transceiver for 433MHz wireless serial communication.

Serial InterfaceUses a standard UART TX/RX interface for transparent wireless data links.

Long Range LinkDesigned for long-range 433MHz point-to-point or controller-to-device communication.

Platform CompatibilityWorks with Arduino, Raspberry Pi, ESP32, and other microcontrollers with UART support.

No Network StackSends and receives serial data without requiring a separate wireless networking stack.

Project Use CasesSuitable for remote sensors, robotics, home automation, telemetry, commands, and data logging.

Wired Link ReplacementReplaces short wired serial connections with a compact 433MHz wireless transceiver module.

Verified buyers

Customer Reviews