This is the Atmega328PB support package for Arduino derivative from Andre Moehl! Look at https://github.com/amoehl/uino-hardware hardware Repo for Schematic. This package lets you compile your code for the Atmel Atmega328PB Microcontroller. There is no additionally compiler needed. You can compile out of the box.

Arduino IDE 1.6.9 or higher which contains avr-gcc in Version 4.9.2

Copy this link into your Arduino IDE.

https://raw.githubusercontent.com/nhatuan87/ATmega328PB/master/package_atmega328pb_index.json

Run "Board Manager" -> Contributed -> Atmega328PB -> Install

This Package currently supports only Atmel ATmega328PB Xplained Mini boards.\