#define ECHO_PIN 2

#define TRIG_PIN 15

void setup() {

  // put your setup code here, to run once:

  Serial.begin(115200);

  //Serial.println("Hello, ESP32!");

  pinMode(LEND, OUTPUT);

  pinMode(TRIG_PIN, OUTPUT);

  pinMode(ECHO_PIN, INPUT);

  pinMode(5, OUTPUT); //merah

  pinMode(18, OUTPUT); //hijau

  pinMode(19, OUTPUT); //biru

  pinMode(21, OUTPUT); //ungu

  pinMode(4, OUTPUT); //buzzer

}



void loop() {

  // put your main code here, to run repeatedly:

  //delay(10); // this speeds up the simulation

  digitalWrite(TRIG_PIN, LOW);

  delayMicroseconds(2);

  digitalWrite(TRIG_PIN, HIGH);

  delayMicroseconds(10);

  digitalWrite(TRIG_PIN, LOW);

  int duration=pulseIn(ECHO_PIN,HIGH);

  float distance=duration*0.034/2;



  if(distance>50){

    digitalWrite(21, HIGH);

    digitalWrite(19, LOW);

    digitalWrite(18, LOW);

    digitalWrite(5, LOW);

    digitalWrite(4, LOW);

  }



  if(distance>100){

    digitalWrite(21, HIGH);

    digitalWrite(19, HIGH);

    digitalWrite(18, LOW);

    digitalWrite(5, LOW);

    digitalWrite(4, LOW);

  }



  if(distance>200){

    digitalWrite(21, HIGH);

    digitalWrite(19, HIGH);

    digitalWrite(18, HIGH);

    digitalWrite(5, LOW);

    digitalWrite(4, LOW);

  }



  if(distance>300){

    digitalWrite(21, HIGH);

    digitalWrite(19, HIGH);

    digitalWrite(18, HIGH);

    digitalWrite(5, HIGH);

    digitalWrite(4, HIGH);

  }



  Serial.print("Jarak : ");

  Serial.println(distance);

  delay(100);

}