UnoNet Arduino board with Ethernet (Atmega328PB)

Setting the Arduino IDE up Using the board with the Arduino IDE requires you to install board support for the ATMega328PB processor. Here's a short introduction to how that is made. This installation method requires Arduino IDE version 1.6.4 or greater.

• Open the Arduino IDE.
• Open the File > Preferences menu item.
• Enter the following URL in Additional Boards Manager URLs: https://mcudude.github.io/MiniCore/package_MCUdude_MiniCore_index.json
• Open the Tools > Board > Boards Manager... menu item.
• Wait for the platform indexes to finish downloading.
• Scroll down until you see the MiniCore entry and click on it.
• Click Install.
• After installation is complete close the Boards Manager window.

Note: If you plan to use the *PB series, you need the latest version of the Arduino toolchain. This toolchain is available through IDE 1.8.6 or newer. Here's how you install/enable the toolchain:

• Open the Tools > Board > Boards Manager... menu item.
• Wait for the platform indexes to finish downloading.
• The top is named Arduino AVR boards. Click on this item.
• Make sure the latest version is installed and selected
• Close the Boards Manager window.

When flashing you board you need to make sure that you have selected the MiniCore ATMega328 processor and the PB variant. All other options can be left to their defaults.