Node.js Application

Add the following code to server.js:

server.js

...

var button = gpio.init("S11A");

var wasButtonPressed = false;

button.setDirection('input');

setInterval(function(){
    // If button is just released...
    if(button.getValue() === 1 && wasButtonPressed === true){
        wasButtonPressed = false;

        // ...reads the LED state...
        var ledState = led.getValue();

        //...inverses it...
        if(ledState === 1){
            ledState = 0
        }else{
            ledState = 1;
        }

        //...writes...
        led.setValue(ledState);

        //...and submits to the web app if connected
        if(clients !== undefined){
            clients.emit('tps:state:changed', ledState);
        }
    }else if(button.getValue() === 0){
        // If button is pressed
        wasButtonPressed = true;
    }
},100);

...