The HC-12 Wireless Serial Module is a long-range 433MHz transceiver offering UART-based communication up to 1000 meters in open space. With 100 selectable channels, adjustable transmit power up to 100mW, and configurable baud rates, it is ideal for remote control, telemetry, and wireless sensor network projects using Arduino or ESP32.

HC-12 Wireless Serial Module – 433MHz Long Range Transceiver

Name: HC-12 Wireless Serial Module - 433MHz Long Range Transceiver - robboquad
SKU: 1235
Price: 450.00 INR
Availability: InStock

SKU 1235 Category Sensors & Modules

₹450.00 (Excl GST)

excl. GST*

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HC-12 Wireless Serial Module – 433MHz Long Range Transceiver

The HC-12 Wireless Serial Module is a half-duplex, long-range wireless transceiver designed for reliable UART-based serial communication between two microcontrollers or embedded devices. Built around the SI4463/SI4438 RF transceiver chip and an onboard STM8S microcontroller, it operates in the 433MHz ISM band and can transmit data over distances of up to 1000 meters in open space, making it a popular choice for Arduino and ESP32-based wireless projects.

Key Features

Long-range wireless communication up to 1000 meters in open space
Operates in the license-free 433.4MHz to 473.0MHz ISM band
100 selectable communication channels with 400kHz spacing
Adjustable transmit power up to 100mW (20dBm)
High receiver sensitivity down to -117dBm
Configurable baud rate from 1200bps to 115200bps
Simple UART TTL interface for easy microcontroller integration
Four selectable working modes (FU1 to FU4) for power and range optimization
Built-in spring antenna with optional IPEX antenna socket
Easy integration with Arduino, ESP32, and other microcontroller platforms

Technical Specifications

Parameter	Specification
Transceiver IC	Silicon Labs SI4463 / SI4438
Onboard Microcontroller	STMicroelectronics STM8S003F3
Operating Frequency	433.4MHz to 473.0MHz
Number of Channels	100, with 400kHz channel spacing
Modulation	GFSK (Gaussian Frequency-Shift Keying)
Communication Distance	Approximately 1000 meters in open space (default setting)
Transmit Power	-1dBm to 20dBm (adjustable, default 20dBm / 100mW)
Receiver Sensitivity	-100dBm to -117dBm depending on baud rate
Serial Baud Rate	1200bps to 115200bps (configurable)
Interface	UART TTL (RX, TX, GND, SET)
Operating Voltage	3.2V to 5.5V DC
Transmitting Current	100mA continuous max, 200mA peak
Idle Current	3.6mA (FU1), 80uA (FU2), 16mA (FU3/FU4)
Operating Temperature	-40C to +85C
Module Dimensions	27.8mm x 14.4mm x 4mm

Applications

Long-Range Remote Control Systems
Wireless Sensor Networks
Drone and RC Telemetry Links
Home and Industrial Automation
Agricultural and Environmental Monitoring
Arduino to Arduino Wireless Data Transfer
GPS Tracking and Remote Data Logging

Important Notes

This is a half-duplex module; only one device can transmit at a time on the same channel.
Actual communication range depends on antenna quality, line of sight, baud rate, and surrounding interference.
Use the SET pin to enter configuration mode for changing channel, baud rate, or transmit power settings.
Lower baud rates generally provide longer range due to higher receiver sensitivity.
Ensure a stable power supply within 3.2V to 5.5V for reliable transmission, especially during peak current draw.
Both communicating modules must be configured with matching channel and baud rate settings.