HC-12 STM8S003F3P6 433Mhz SI4438 Wireless Serial Port Module

The HC-12 433MHz SI4438 Wireless Serial Port Module delivers reliable long-range wireless communication for embedded systems and IoT applications.

Operating at 3.3V with configurable power output up to 100mW, it achieves default transmission distances of 600m, extendable to 1000m at 5000 BPS baud rate. The module supports 100 communication channels across the 433.4–473.0 MHz frequency range, with adjustable idle current consumption starting at 16mA. Preset in FU3 mode at 9600 BPS on channel CH001 (433.4MHz), it offers full software upgrade compatibility for future-proofing.

Its compact 27.8 x 14.4 x 4mm form factor integrates seamlessly into space-constrained designs. Ideal for remote monitoring, telemetry, and wireless data transfer applications requiring efficient, configurable serial communication.