Program Sensor Parkir berbasis arduino dengan sensor HC-SR04

// -------------------------------------------
// Program Sensor Parkir Berbasis Arduino dengan Sensor HC-SR04
// www.ardukode.blogspot.com
// -------------------------------------------

#define pin_trig 13
#define pin_echo 12
#define pin_10cm 11
#define pin_25cm 10
#define pin_40cm 9
#define pin_buz 8

void setup()
{
//Serial.begin (9600)
pinMode(pin_trig, OUTPUT);
pinMode(pin_echo, INPUT);
pinMode(pin_10cm, OUTPUT);
pinMode(pin_25cm, OUTPUT);
pinMode(pin_40cm, OUTPUT);
pinMode(pin_buz, OUTPUT);
}

void loop()
{
//kirim gelombang kotak
digitalWrite(pin_trig, HIGH);
delayMicroseconds(10);
digitalWrite(pin_trig, LOW);

// terima pantulan
double times = pulseIn(pin_echo, HIGH);

// hitung jarak
double range = 0.0343 * ( times / 2);

//Jika jarak lebih kurang sama dengan 10cm
if (range <= 10 )
{
digitalWrite(pin_10cm, HIGH);
digitalWrite(pin_buz, HIGH);
Serial.print(range);
delay(50);
digitalWrite(pin_10cm, LOW);
digitalWrite(pin_buz, LOW);
delay(50);
}

//Jika jarak lebih dari 10.5 cm dan kurang dari 25 cm
if ((range >=10.5) && (range <= 25))
{
digitalWrite(pin_25cm, HIGH);
digitalWrite(pin_buz, HIGH);
Serial.println(range);
delay(100);
digitalWrite(pin_25cm, LOW);
digitalWrite(pin_buz, LOW);
delay(100);
}

//ika jarak lebih dari 25.5 cm dan kurang dari 40 cm
if ((range >=25.5) && (range <= 40))
{
digitalWrite(pin_40cm, HIGH);
digitalWrite(pin_buz, HIGH);
Serial.println(range);
delay(200);
digitalWrite(pin_40cm, LOW);
digitalWrite(pin_buz, LOW);
delay(200);
}

else
{
digitalWrite(pin_10cm, LOW);
digitalWrite(pin_25cm, LOW);
digitalWrite(pin_40cm, LOW);
digitalWrite(pin_buz, LOW);
Serial.print(range);
Serial.println(" CM");
}
delay(100); // delay 100ms
}