ev3js/test/led.js

LEGO Mindstorms EV3 API for Node.js

var LED = require('../led.js');

var leds = [
    new LED(LED.GREEN, LED.LEFT),
    new LED(LED.RED, LED.LEFT),
    new LED(LED.GREEN, LED.RIGHT),
    new LED(LED.RED, LED.RIGHT)
];

var p = 0;
var b = 0;
leds[0].set(0);
leds[1].set(0);
leds[2].set(0);
leds[3].set(0);
setInterval(function(){
    switch(p){
        case 0:
            leds[0].set(b += 0.01);
            if(b >= 1){
                p++;
                b = 0;
            }
            break;
        case 1:
            leds[1].set(b += 0.01);
            if(b >= 1){
                p++;
                b = 0;
            }
            break;
        case 2:
            leds[3].set(b += 0.01);
            if(b >= 1){
                p++;
                b = 0;
            }
            break;
        case 3:
            leds[2].set(b += 0.01);
            if(b >= 1){
                p++;
                b = 1;
            }
            break;
        case 4:
            b -= 0.01;
            leds.forEach(function(led){
                led.set(b);
            });
            b > 0 || p++;
            break;
        default:
            process.exit();
    }
}, 10);