rpi-pin-events/index.js

Bathroom helper extraordinaire

var Gpio = require('onoff').Gpio;
var EventEmitter = require('events');
 
function exit() {
  pir.unexport();
  process.exit();
}

const CHANGE_EVENT = 'change';

class PinInputEvents extends EventEmitter
{
	super({ pin = 15, changeListeners = [], minimumInterval = 0 })
	{
		this.pin = pin;	
		listeners.forEach((changeListeners)=>
		{
			this.addChangeListener(changeListener);
		});


		this.deviceIO = new Gpio(pin, 'in', 'both');
		this.deviceIO.watch(this.dispatchGPIOEvent);
	}

	dispatchGPIOEvent (error, value)
	{
		if(error)
		{
			console.error('error ->', error);
			exit();
		}
		this.emitChange(CHANGE_EVENT, value);
	}
	/**
	*	adds a listener in the form function(err, value){} 
	*/
	onChange ( listener )
	{
		this.on(CHANGE_EVENT, listener);
	}
	/**
	*	removes specified listener
	**/
	removeChangeListener ( listener )
	{
		this.removeListener(CHANGE_EVENT, listener);
	};
}

let pirSignal = new PinInputEvents(
{
	pin : 15,
	minimumInterval : 1000,
	changeListeners : 
	[
		(value)=>
		{
			console.log('change listener detected value ->', value);
		}
	]
});

console.log('pirSignal ->', pirSignal);

pirSignal.onChange((value)=>console.log('value'));
console.log('watching');