To get started with tramontana we need to understand this very basic concept: our digital devices are a set of inputs and outputs. Thanks to tramontana you can use your devices’ inputs (or sensors), like the accelerometer, or outputs (AKA actuators), like the haptic engine, without needing to be a specialist in networking nor in Android or iOS development. The only thing you need is to write one single sketch, in Processing or Javascript, where you can access one of more devices (also called nodes) running the tramontana app.