Datasheet

Here's a short description of each of the Adafruit supplied packages that will be available in

the Board Manager when you add the URL:

Adafruit AVR Boards - Includes support for Flora, Gemma, Feather 32u4, Trinket, &

Trinket Pro.

Adafruit SAMD Boards - Includes support for Feather M0, Metro M0, Circuit

Playground Express, Gemma M0 and Trinket M0

Arduino Leonardo & Micro MIDI-USB - This adds MIDI over USB support for the Flora,

Feather 32u4, Micro and Leonardo using the arcore project.

If you have multiple boards you want to support, say ESP8266 and Adafruit, have both URLs

in the text box separated by a comma (,)

Once done click OK to save the new preference settings. Next we will look at installing

boards with the Board Manager.

Now continue to the next step to actually install the board support package!