GPIO WATCHER

こんなん

var b = require('bonescript');
var EventEmitter = require('events').EventEmitter;

var Watcher = function(pinName, interval){
	var emitter = new EventEmitter();
	var f = 0;
	b.pinMode(pinName, b.INPUT);
	setInterval(function(){
		b.digitalRead(pinName, function(x){
			if(f !== x.value){
				if(x.value === 1){
					emitter.emit('high');
				}
				if(x.value === 0){
					emitter.emit('low');
				}
			}
			f = x.value;
		});
	}, interval);
	return emitter;
};

var pin8_8 = Watcher('P8_8', 50);

pin8_8.on('high', function(){
	console.log('HIGH!');
});