#define ECHO_PIN 15
#define TRIG_PIN 2
#define l1 33
#define l2 32
#define l3 5
#define buz 4


void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  pinMode(l3, OUTPUT);
  pinMode(buz, OUTPUT);
  
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {
  // float distance = readDistanceCM();

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());
  delay(5000);
if(readDistanceCM()< 60)
{
  Serial.println("Hati-hati Banjir");

  digitalWrite(l1, HIGH);
  digitalWrite(l2, HIGH);
  digitalWrite(l3, HIGH);
  tone(buz, 2000);
  noTone(buz);
  delay(2000);
  tone(buz, 500, 2000);
  delay(3000);
  
}
else if(readDistanceCM()>= 60 && readDistanceCM()< 70)
{
  Serial.println("Potensi Bahaya Banjir");
  digitalWrite(l1, HIGH);
  digitalWrite(l2, HIGH);
  digitalWrite(l3, LOW);
}
else if(readDistanceCM()>= 70)
{
  Serial.println("Wilayah Aman Banjir");
  digitalWrite(l1, HIGH);
  digitalWrite(l2, LOW);
  digitalWrite(l3, LOW);
}
}