RFM95W-868S2
Overview
RFM95W-868S2 is a surface-mount LoRa transceiver module for the 868 MHz ISM band. It supports LoRa and multiple FSK/GMSK/OOK-style modulations, communicates over SPI, and accepts 1.8V to 3.7V supply. The module is specified with up to 17 dBm transmit power and a receive sensitivity around -123 dBm; an external antenna is required (not included).
Why Choose This Part
This module offers a strong link budget (high sensitivity and up to 17 dBm TX) in a compact SMD package, making it suitable for battery-powered long-range designs. Wide supply range (1.8V to 3.7V) and SPI connectivity simplify interfacing to a wide range of microcontrollers. Surface-mount form factor and standard 50 ohm antenna connection (antenna not included) allow easy integration into custom PCBs.
Applications
Key Specifications
Getting Started
Develop with any MCU that provides SPI and a 3.3V-capable interface; common paths use Arduino-compatible boards or STM32/ESP32 dev boards. Use Semtech SX127x-compatible software stacks and libraries (for example the Arduino 'LoRa' library by Sandeep Mistry, RadioHead, or the LMIC libraries for LoRaWAN). Remember to provide a proper 50 ohm antenna, observe regional regulatory limits, and add a matching feed and ground clearance as recommended in the module datasheet.
