Description

The Feather card is the new development card developed by Adafruit and as its name implies, Feather means Feather in English, it is small, light and can lift you up! It was designed to set a new standard for small microcontroller. This is the Adafruit Feather 32u4 RFM95 LoRa Radio card (868 or 915 MHz). Ideal for creating wireless networks that can go further than 2.4GHz 802.15.4 and similar, more flexible than Bluetooth LE and without the high power requirements of WiFi.

At the heart of the Feather card is an ATmega32u4 ATmega32u4 with an 8 MHz frequency and a 3.3 V logic, like the Flora card. This chip has 32K flash and 2K of RAM, with built-in USB, not only does it have a USB-to-serial converter and an integrated debugging capability without the need for an FTDI chip, it can also act as a mouse, keyboard, USB MIDI device, etc.

In order to carry out portable installations, this board has a JST connector dedicated to 3.7V lithium polymer batteries with an integrated charging circuit, 500mAh minimum for this Feather board. If you don't need a battery, simply power it through the micro-USB connector with a 500mA output source. The Feather card will automatically switch between the USB power supply and the battery if necessary.

M0 characteristics

•     Dimensions: 2.0" x 0.9" x 0.28" or 51mm x 23mm x 8mm
•     Very light: 5,5g
•     ATmega32u4 8MHz ATmega32u4 with 3.3V logic
•     3.3V output with 500 mA controller
•     Native USB with USB bootloader and debug in series
•     Lots of pine trees with 20 GPIO
•     Hardware serial port, hardware I2C port and hardware SPI port
•     7 pins, PWM capable
•     10 pins with analog inputs
•     100mA Lipo Charger with LED status LED
•     Pin 13 wired to a user LED
•     Power supply controllable via POWER ENABLE
•     4 fixing holes Reset button

Radio Features

•     LoRa SX1276 LoRa module with SPI interface
•     An Arduino library allows you to easily manage Radio packages.
•     Uses amateur or free ISM radio frequencies
•     Uses a simple antenna cable or uFL or SMA connector to be soldered
•     300µA (+13dBm) to 120 mA (+20dBm) required during transmission  

Documentation

Adafruit Feather 32u4 with LoRa Radio Module