SI4432 Long Range Wireless RF Transceiver Module – 1500m SPI Communication
Product Description
The SI4432 Long Range Wireless Module is a high-performance, low-power RF transceiver designed for long-distance wireless communication between embedded devices. Based on the Silicon Labs Si4432 EZRadioPRO chipset, it supports wireless data transmission and reception across the 240–960 MHz frequency range.
With high receiver sensitivity of up to -121 dBm and adjustable RF output power up to +20 dBm, this module is suitable for long-range communication projects, remote monitoring, telemetry, and wireless sensor networks.
The module supports FSK, GFSK, and OOK modulation techniques and includes useful features such as Received Signal Strength Indicator (RSSI), packet handling, a built-in temperature sensor, and low-battery detection. Its compact Single-In-Line (SIL) package makes it convenient to integrate into embedded electronic systems.
The SI4432 is an excellent choice for Arduino, microcontroller-based wireless communication, IoT prototypes, automation systems, and remote-control applications.
Key Features
Long-Range Wireless Communication: Advertised communication range of up to 1500 metres in open-area conditions.
Wide Frequency Coverage: Supports operation across the 240–960 MHz range, depending on module configuration.
High Receiver Sensitivity: Sensitivity of up to -121 dBm.
Adjustable Transmit Power: RF output power configurable up to +20 dBm.
Multiple Modulation Modes: Supports FSK, GFSK, and OOK.
Low Power Consumption: Includes sleep and standby operating modes.
RSSI Support: Measures received signal strength for link monitoring.
Built-in Temperature Sensor: Provides an onboard temperature measurement feature.
Packet Handling: Integrated packet processing and 64-byte FIFO.
Compact SIL Design: Suitable for embedded and space-constrained projects.
Technical Specifications
Parameter | Specification |
Product Name | SI4432 Long Range Wireless Module |
RF Transceiver IC | Silicon Labs Si4432 |
Module Type | RF Wireless Transceiver |
Package Type | Single-In-Line (SIL) |
Operating Frequency Range | 240–960 MHz |
Common Frequency Range | 410–440 MHz (module-dependent) |
Maximum Receiver Sensitivity | Up to -121 dBm |
Maximum RF Output Power | Up to +20 dBm |
Modulation Types | FSK, GFSK, OOK |
Communication | Wireless RF |
Host Interface | SPI |
FIFO Size | 64 bytes |
Signal Monitoring | RSSI |
Additional Features | Temperature sensor, low-battery detection |
Power Modes | Sleep, standby, and active modes |
Advertised Communication Range | Up to 1500 m in open areas |
Applications
Long-range wireless communication projects
Arduino and microcontroller RF systems
Wireless sensor networks
Remote monitoring and control
IoT communication prototypes
Telemetry and data transmission
Industrial automation systems
Wireless alarm and notification systems
Smart agriculture monitoring
Battery-powered remote devices
Package Includes
1 × SI4432 Long Range Wireless RF Transceiver Module (Single-In-Line Package)
Important Notes
The advertised 1500 m communication range is an approximate open-area claim. Actual range depends on antenna type, antenna placement, frequency, transmit power, receiver sensitivity, obstacles, and interference.
The module communicates with a host microcontroller through SPI; it is not a direct UART wireless module.
The module's frequency configuration must match between the transmitter and receiver.
Check the module's actual operating voltage and logic-level requirements before connecting it to a microcontroller.
An appropriate antenna is essential for reliable RF performance.
RF frequency and transmit-power regulations vary by country. In India, verify applicable WPC and frequency-band requirements before deploying or transmitting.
The 240–960 MHz range describes the transceiver IC's frequency coverage; the actual module may be configured for only a particular frequency band.
