Adafruit Feather RP2040 with RFM95 LoRa 915 MHz

Overview

The Adafruit Feather RP2040 with RFM95 LoRa combines the dual-core RP2040 with the RFM95W LoRa transceiver module, based on the Semtech SX1276/7/8 chipset. LoRa's chirp spread spectrum modulation enables extremely long range — up to 2 km in typical urban environments and 20 km or more in open line-of-sight conditions — at very low power consumption, making it ideal for IoT sensor networks, asset tracking, and environmental monitoring.

The RFM95W operates in the 868/915 MHz ISM band, outputs up to +20 dBm (100 mW), and draws as little as 300 µA in sleep mode. Connection is via SPI. Both a uFL connector for external antennas and a wire solder pad are included for flexible antenna options. The LoRa physical layer is compatible with LoRaWAN stacks for cloud connectivity.

Built on the RP2040 with 264 KB SRAM and 8 MB SPI flash, the board follows the standard Adafruit Feather pinout and is fully compatible with CircuitPython, MicroPython, and Arduino with the Adafruit RFM9x library. Standard Feather accessories — LiPo charger, USB Type-C, STEMMA QT, status NeoPixel, four mounting holes — are all included.