Description
Description
The Mini SI4432 Long-Range Wireless Module is a compact, high-performance RF transceiver module designed for IoT applications, remote control systems, and wireless sensor networks. Built around the Silicon Labs SI4432 transceiver IC – a member of the EZRadioPRO family – this module delivers exceptional range and reliability in a miniature SMD (Surface Mount Device) form factor .
The SI4432 is a highly integrated wireless ISM band transceiver capable of operating across a wide frequency range from 240MHz to 960MHz, with optimized performance in the 410-525MHz band . It features an impressive maximum output power of +20dBm (100mW) and outstanding receiver sensitivity of -117dBm to -121dBm, enabling open-area communication distances of over 1000 meters .
This module is designed for developers who need reliable long-range wireless communication without extensive RF engineering knowledge. The SI4432 handles all RF modulation and demodulation tasks, including FSK, GFSK, and OOK modulation schemes, with data rates ranging from 0.123kbps to 256kbps . The module communicates with your host microcontroller via a standard SPI interface, requiring only 4-5 I/O pins for full control.
Key integrated features include a 64-byte FIFO for buffering transmit and receive data, digital RSSI for signal strength monitoring, automatic CRC calculation and checking, programmable packet handling, and low battery detection . The chip also includes an integrated temperature sensor and 8-bit ADC for environmental monitoring applications.
The module’s SMD (stamp-hole) design allows for direct surface-mount soldering onto custom PCBs, making it ideal for volume production and space-constrained applications. A spring antenna is included with each module for immediate out-of-box use.
Whether you need to build a long-range remote control system, a wireless sensor network for agriculture or industrial monitoring, a remote meter reading system, or a wireless alarm system, the Mini SI4432 module delivers reliable, high-performance wireless communication in a miniature package .
Key Features
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Ultra-Long Range – Up to 1000+ meters open-area communication distance with +20dBm output power and -121dBm sensitivity
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Wide Frequency Range – Operates from 240MHz to 960MHz (optimized for 410-525MHz, including 433MHz ISM band)
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High Output Power – Maximum +20dBm (100mW) transmit power with 8 adjustable power levels
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Multiple Modulation Schemes – Supports FSK, GFSK, and OOK modulation for flexible application use
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Low Power Consumption – Receive current: 18.5mA; Standby current: 300nA; Shutdown current: 10nA
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SPI Control Interface – Simple 4-wire SPI connection to any microcontroller (Arduino, ESP32, STM32, etc.)
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Integrated Features – 64-byte FIFO, digital RSSI, temperature sensor, 8-bit ADC, low battery detection
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Miniature SMD Package – Compact dimensions (approx. 17×16.5mm) with stamp-hole pads for PCB integration
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Wide Supply Voltage – Operates from 1.8V to 3.6V DC (3.3V recommended)
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Industrial Temperature Range – -40°C to +85°C for reliable outdoor and industrial use
Technical Parameters
| Parameter | Value |
|---|---|
| Operating Frequency | 240 – 960 MHz (410-525MHz optimized) |
| Supply Voltage | 1.8V – 3.6V DC (3.3V typical, not 5V tolerant) |
| Transmit Power | Up to +20dBm (100mW) (8 adjustable levels) |
| Receiver Sensitivity | -121dBm @ 1.2kbps / -117dBm @ 9.6kbps |
| Communication Distance | 1000+ meters (open area, line of sight) |
| Data Rate | 0.123 – 256 kbps (programmable) |
| Modulation Types | FSK, GFSK, OOK |
| Receive Current | 18.5 mA (typical) |
| Standby/Shutdown Current | 300 nA / 10 nA |
| Operating Temperature | -40°C to +85°C |
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