This Arduino library provides an interface for interacting with the SerialCraft Minecraft mod. Follow these instructions for getting up and running.
First, you'll need the Arduino IDE. You can download it here.
If you've purchased the kit for the Advanced Minecraft Controller classes at Children's Museum of Bozeman STEAMlab, then the Arduino you're using is called a Pololu A-Star Mini LV and it requires installing separate drivers for Windows. Follow these instructions, provided by Pololu.
After the drivers have been installed, you should be able to select the Arduino Micro or Arduino Leonardo from the Board menu as they use the same chip (ATmega 32U4). You can also add a Pololu A-Star 32U4 entry to the Board menu by following the "Arduino add-on" section here.
Download the SerialCraft Arduino library. Install the library by following the instructions under Importing a zip library on Arduino's site.
Minecraft is not necessary to use the SerialCraft Arduino library, but it's intent is to be able to interface with Minecraft. You can purchase and download Minecraft here.
You'll need Minecraft Forge to be able to install the SerialCraft Minecraft mod. The instructions page for installing Minecraft Forge can be found here. You'll need to install Minecraft Forge for Minecraft version 1.7.10. Here are video tutorials on how to install it for Windows and Mac.
You can download the latest SerialCraft mod release here. You'll also need to download the jssc library (also from the release page), which SerialCraft depends on. Unzip both files and place the resulting jar files in the mods directory as explained here.
Once installed and you enter the game, you can press 'k' by default to list any serial devices connected to your computer. If you have your Arduino hooked up to your computer, it should be listed there. Close and reopen the menu to refresh the list. Click connect after inputting the baud rate that your device has been configured to transmit at to start accepting serial events.
Stay tuned for more documentation on what serial commands you can send to (or receive from) the SerialCraft mod.