diff --git a/README.md b/README.md
index 624156b..60cc2d4 100644
--- a/README.md
+++ b/README.md
@@ -24,4 +24,6 @@ Comunicación VoIP entre dos raspberrys.
 6. Añadir intercom en /etc/hosts
 7. Copiar intercom.py e intercom.yml en la home. Editar intercom.yml
 
-CONFIGURAR ALSA?
\ No newline at end of file
+## Avoid PulseAudio for using parole directly
+
+`pasuspender -- parole -c rba -d plughw:0,0``
diff --git a/intercom.py b/intercom.py
index 5522fbe..8e4723a 100644
--- a/intercom.py
+++ b/intercom.py
@@ -1,4 +1,6 @@
-import RPi.GPIO as GPIO
+from gpiozero import LED
+from gpiozero import Button
+
 import subprocess
 from threading import Thread
 import socket
@@ -32,22 +34,22 @@ class CallManager:
             s.close()
             self.state = OUTGOING_CALL
             self.station = station
-            GPIO.output(station['red led'], GPIO.HIGH)
+            station['red'].on()
         except Exception as e:
             print('Error al realizar la llamada: ', e)
-            GPIO.output(station['green led'], GPIO.LOW)
+            station['green'].off()
             self.call_process.terminate()
             self.call_process.communicate()
 
     def incoming_call(self, station):
         self.state = INCOMING_CALL
         self.station = station
-        GPIO.output(station['red led'], GPIO.HIGH)
+        station['red'].on()
 
     def hang(self):
         print('Hang! self.station', self.station)
         if self.station is not None:
-            GPIO.output(self.station['red led'], GPIO.LOW)
+            self.station['red'].off()
         if self.call_process is not None:
             self.call_process.terminate()
             self.call_process.communicate()
@@ -96,7 +98,7 @@ def listen(call_manager):
             call_manager.incoming_call(station)
             clientsocket.send(OP_OK)
         elif data == OP_PING:
-            GPIO.output(station['green led'], GPIO.HIGH)
+            station['green'].on()
             clientsocket.send(OP_OK)
         else:
             clientsocket.send(OP_ERROR)
@@ -111,13 +113,13 @@ def check_status(station):
             s.connect((station['host'], station['port']))
             s.send(OP_PING)
             if s.recv(1024) == OP_OK:
-                GPIO.output(station['green led'], GPIO.HIGH)
+                station['green'].on()
             else:
-                GPIO.output(station['green led'], GPIO.LOW)
-                GPIO.output(station['red led'], GPIO.LOW)
+                station['red'].off()
+                station['green'].off()
         except socket.error:
-            GPIO.output(station['green led'], GPIO.LOW)
-            GPIO.output(station['red led'], GPIO.LOW)
+            station['red'].off()
+            station['green'].off()
             print('Check status failed! host=', station['host'])
         finally:
             s.close()
@@ -127,7 +129,6 @@ def check_status(station):
 config = yaml.safe_load(open("intercom.yml"))
 port = config['port']
 stations = config['stations']
-GPIO.setmode(GPIO.BCM)
 
 # Start thread to wait for incoming hang petitions.
 thread_listen = Thread(target=listen, args=(callManager,))
@@ -137,12 +138,18 @@ thread_listen.start()
 # Power off leds and start threads to check other intercoms status.
 for _station in stations:
     _station['ip'] = socket.gethostbyname(_station['host'])
-    GPIO.setup(_station['green led'], GPIO.OUT)
-    GPIO.setup(_station['red led'], GPIO.OUT)
-    GPIO.setup(_station['button'], GPIO.IN, pull_up_down=GPIO.PUD_UP)
-    _station['old button state'] = GPIO.input(_station['button'])
+
+    _station['red'] = LED(_station['red led'])
+    _station['red'].off()
+
+    _station['green'] = LED(_station['green led'])
+    _station['green'].off()
+
+    _station['btn'] = Button(_station['button'])
+    _station['old button state'] = _station['btn'].is_pressed
     _station['button state changed time'] = time.clock_gettime(time.CLOCK_MONOTONIC)
     _station['button pressed'] = False
+
     thread_check = Thread(target=check_status, args=(_station,))
     thread_check.daemon = True
     thread_check.start()
@@ -151,10 +158,11 @@ for _station in stations:
 try:
     while True:
         for _station in stations:
-            new_input_state = GPIO.input(_station['button'])
+            # new_input_state = GPIO.input(_station['button'])
+            new_input_state = station['btn'].is_pressed
             # Al pulsar el interruptor cambia el estado.
             elapsed_time = time.clock_gettime(time.CLOCK_MONOTONIC) - _station['button state changed time']
-            if new_input_state != _station['old button state'] and elapsed_time > 0.05:
+            if new_input_state != _station['old button state'] and elapsed_time > 0.2:
                 if not _station['toogle button']:
                     _station['button pressed'] = not _station['button pressed']
                     if _station['button pressed']:
@@ -176,4 +184,7 @@ try:
                 _station['button state changed time'] = time.clock_gettime(time.CLOCK_MONOTONIC)
         time.sleep(0.02)
 finally:
-    GPIO.cleanup()
+    for _station in stations:
+        _station['red'].close()
+        _station['green'].close()
+        _station['btn'].close()