Adafruit Feather 32u4 RFM95 LoRa Radio

Adafruit Feather 32u4 RFM95 LoRa Radio is a microcontroller with a Long Range (LoRa) packet radio transceiver and built-in USB and battery charging. The device integrates an Adafruit Feather 32u4 in a 900MHz radio module. Designers can use this 900MHz frequency module version for either 868MHz or 915MHz transmission and reception.

The 32u4 RFM95 LoRa Packet Radio supports wireless networks that extend past 2.4GHz 802.15.4. The device is also more flexible than BLUETOOTH® LE and without the high-power requirements of WiFi.

The design is based on the ATmega32u4 processor, clocked at 8MHz and at 3.3V logic. The chip offers 32K of flash and 2K of RAM. The built-in USB provides a USB-to-Serial program and debug capability. To support portable projects, the development board includes a connector for Adafruit 3.7V lithium polymer batteries and built-in battery charging.

Features

  • Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
  • Weight 5.5 grams
  • ATmega32u4 @ 8MHz with 3.3V logic/power
  • 3.3V regulator with 500mA peak current output
  • USB native support comes with a USB bootloader and serial port debugging
  • 20 GPIO pins
  • Hardware Serial, hardware I²C, hardware SPI support
  • 8 PWM pins
  • 10 analog inputs
  • Built-in 100mA lithium polymer battery charger with charging status indicator LED
  • Pin #13 red LED for general purpose blinking
  • Power/enable pin
  • 4 mounting holes
  • Reset button
  • Feather 32u4 LoRa Radio Features
    • SX1276 LoRa® based module with SPI interface
    • Packet radio with ready-to-go Arduino libraries
    • Uses the license-free ISM bands (ITU "Europe" @ 433MHz and ITU "Americas" @ 900MHz)
    • +5 to +20dBm up to 100mW Power Output Capability (power output selectable in software)
    • ~300uA during full sleep, ~120mA peak during +20dBm transmit, ~40mA during active radio listening.
    • Simple wire antenna or spot for uFL connector

Feather 32u4 RFM95 LoRa Radio

Adafruit Feather 32u4 RFM95 LoRa Radio
Publicado: 2017-01-20 | Atualizado: 2022-03-11