Once you want to get any more complex stuff going, you'll need a helper library to manage stuff like the internal temperature sensor, LED matrix, or Bluetooth connection.
To make your life easier, we've written up a wrapper library that manages all this stuff for you.
You'll also need to install some helpers:
To use the LED matrix or Bluetooth connection, you will need to download Adafruit_Microbit from our github repository. You can do that by visiting the github repo and manually downloading or, easier, just click this button to download the zip:
Rename the uncompressed folder Adafruit_Microbit and check that the Adafruit_Microbit folder contains Adafruit_Microbit.cpp and Adafruit_Microbit.h
Place the Adafruit_Microbit library folder your arduinosketchfolder/libraries/ folder.
You may need to create the libraries subfolder if its your first library. Restart the IDE.
We also have a great tutorial on Arduino library installation at:
Once you've re-started the Arduino IDE you should see the library examples appear in the File->Examples->Adafruit_Microbit menu