HC-12 STM8S003F3U6 433Mhz SI4438 Wireless Serial Port Module

HC-12 433MHz SI4438 Wireless Serial Port Module – Professional-Grade Connectivity Reliable long-range wireless communication for embedded systems and IoT applications.

This compact serial module delivers stable connectivity up to 600 m standard, extendable to 1000 m with configurable parameters.

Key Specifications:

• Operating voltage: 3.3 V with low idle current (16 mA default)

• Frequency range: 433.4–473.0 MHz across 100 selectable channels

• Transmit power: Up to 100 mW (adjustable)

• Baud rate: 9600 BPS factory default, supports up to 5000 BPS

• Compact footprint: 27.8 × 14.4 × 4 mm

• Software upgradeable for future compatibility Ships pre-configured in FU3 mode on channel CH001 (433.4 MHz).

Ideal for remote monitoring, sensor networks, and wireless data acquisition where space and power efficiency matter. 

Supports flexible configuration to match your application requirements.