This sketch version requires the library "PinChangeInterrupt" for interrupt handling. This is a non-standard library (it is not installed by default). Execute the following steps to install it onto your PC. You only need to do this once.
- Go to 'Sketch' => 'Include Library' => 'Manage Libraries...':
- The Library Manager will be started. Wait until the list of installed libraries is updated:
- In the search box, enter "pinchangeinterrupt":
- Select the libary named PinChangeInterrupt by NicoHood, then press "install":
- Wait until the installation is completed, then press "close":
