SIMULASI JARAK PADA MOBIL

const int TRIG_PIN = 9;
const int ECHO_PIN = 10;
const int BUZZER = 11;
int LED = 12;

long duration;
int distance;
int safetyDistance;

void setup() {
Serial.begin(9600);
pinMode(TRIG_PIN,OUTPUT);
pinMode(ECHO_PIN,INPUT);
pinMode (BUZZER , OUTPUT);
}

void loop() {
// Clears the trigPin
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(ECHO_PIN, HIGH);

// Calculating the distance
distance= duration*0.034/2;

safetyDistance = distance;
if (safetyDistance >= 5 && safetyDistance <= 10 ){
    for(int fadeValue = 10 ; fadeValue <= 200; fadeValue +=5)
    analogWrite(BUZZER, fadeValue);
}
else if (safetyDistance >= 10 && safetyDistance <= 18 ){
    for(int fadeValue = 200 ; fadeValue >= 50; fadeValue -=5)
    analogWrite(BUZZER, fadeValue);
}
else if (safetyDistance >= 18 && safetyDistance <= 20 ){
    for(int fadeValue = 200 ; fadeValue >= 0; fadeValue -=5)
    analogWrite(BUZZER, fadeValue);
}

// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
}