diff --git a/main.py b/main.py
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+++ b/main.py
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+#!/usr/bin/env pybricks-micropython
+
+from pybricks.hubs import EV3Brick
+from pybricks.ev3devices import (Motor, TouchSensor, ColorSensor, InfraredSensor, UltrasonicSensor, GyroSensor)
+from pybricks.parameters import (Port, Stop, Direction, Button, Color, SoundFile, ImageFile, Align)
+from pybricks.tools import print, wait, StopWatch
+
+import struct
+
+# Declare motors 
+left_motor = Motor(Port.B)
+right_motor = Motor(Port.C)
+steer_motor = Motor(Port.A)
+forward = 0
+left = 0
+
+# Dichiarazione device
+device = EV3Brick()
+device.speaker.set_volume(100, "_all_")
+device.speaker.set_speech_options(language="it", speed=175, pitch=50)
+device.speaker.say("Ciao Matteo. Mi sto preparando")
+
+# Dichiarazione sensore ultrasuoni
+ultrasuoni = UltrasonicSensor(Port.S3)
+
+
+# Auto center steering wheels.
+steer_motor.run_until_stalled(250)
+steer_motor.reset_angle(90)
+steer_motor.run_target(300,0)
+
+
+# A helper function for converting stick values (0 - 255)
+# to more usable numbers (-100 - 100)
+def scale(val, src, dst):
+    """
+    Scale the given value from the scale of src to the scale of dst.
+ 
+    val: float or int
+    src: tuple
+    dst: tuple
+ 
+    example: print(scale(99, (0.0, 99.0), (-1.0, +1.0)))
+    """
+    return (float(val-src[0]) / (src[1]-src[0])) * (dst[1]-dst[0])+dst[0]
+
+
+# Open the Gamepad event file:
+# /dev/input/event3 is for PS3 gamepad
+# /dev/input/event4 is for PS4 gamepad
+# look at contents of /proc/bus/input/devices if either one of them doesn't work.
+# use 'cat /proc/bus/input/devices' and look for the event file.
+infile_path = "/dev/input/event4"
+
+# open file in binary mode
+in_file = open(infile_path, "rb")
+
+# Read from the file
+# long int, long int, unsigned short, unsigned short, unsigned int
+FORMAT = 'llHHI'    
+EVENT_SIZE = struct.calcsize(FORMAT)
+event = in_file.read(EVENT_SIZE)
+
+device.speaker.say("Tutto fatto, adesso sono pronto")
+
+while event:
+    (tv_sec, tv_usec, ev_type, code, value) = struct.unpack(FORMAT, event)
+    print("Event")
+    
+    if ev_type == 1: # A button was pressed or released.
+        if code == 310 and value == 0: #L1
+            steer_motor.reset_angle(steer_motor.angle()-5)
+        elif code == 311 and value == 0: #R1
+            steer_motor.reset_angle(steer_motor.angle()+5)
+        elif code == 313 and value == 1: #R2
+            device.speaker.beep(frequency=500, duration=-1)
+        elif code == 313 and value == 0: #R2 rilasciato
+            device.speaker.beep(frequency=500, duration=0)
+            
+    elif ev_type == 3: # Stick was moved
+        if code == 3: 
+            left = scale(value, (0,255), (40, -40))
+        if code == 1: # left stick vertical
+            #if (value > 0 and ultrasuoni.distance() > 350) or value < 0:
+            forward = -scale(value, (0,255), (100,-100))
+        
+    # Set motor voltages. 
+    left_motor.dc(forward)
+    right_motor.dc(forward)
+
+    # Track the steering angle
+    steer_motor.track_target(left)
+
+    # Finally, read another event
+    event = in_file.read(EVENT_SIZE)
+
+in_file.close()
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