#include <LiquidCrystal_I2C.h>

const int trigPin = 4;
const int trigPin2 = 18;
const int echoPin = 5;
const int echoPin2 = 19;

int buzzerPin = 13;

//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration,
      duration2;
float distanceCm,
      distanceCm2;
float distanceInch,
      distanceInch2;

// set the LCD number of columns and rows
int lcdColumns = 16;
int lcdRows = 2;
// set LCD address, number of columns and rows
// if you don't know your display address, run an I2C scanner sketch
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  pinMode(buzzerPin, OUTPUT);

  lcd.init();
  lcd.setCursor(0, 0);
  lcd.print("Welcome");delay(500);
  lcd.setCursor(8, 0);
  lcd.print("to");delay(500);
  lcd.setCursor(0, 1);
  lcd.print("*anjir simulator");
  delay(2000);

}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.clear();
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);

  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);

  Serial.println(duration2);
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  distanceCm2 = duration2 * SOUND_SPEED/2;
  // Convert to inches
  distanceInch = distanceCm * CM_TO_INCH;
  distanceInch2 = distanceCm2 * CM_TO_INCH;
  
  // Prints the distance in the Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.print(distanceCm);
  Serial.print("\t|Distance (inch): ");
  Serial.println(distanceInch);
  Serial.print("Distance2(cm): ");
  Serial.print(distanceCm2);
  Serial.print("\t|Distance2(inch): ");
  Serial.println(distanceInch2);

  lcd.setCursor(0, 0); lcd.print("Usonic1");
  lcd.setCursor(8, 0); lcd.print("Usonic2");
  lcd.setCursor(0, 1); lcd.print(distanceCm);
  lcd.setCursor(8, 1); lcd.print(distanceCm2);
  
  delay(500);

  if (distanceCm < 100 && distanceCm2 < 100){
    for (int i=0; i<2; i++){
      lcd.clear();
      digitalWrite(buzzerPin, HIGH); // Menyalakan buzzer
      delay(500); // Delay selama 1 detik
      lcd.setCursor(0, 0); lcd.print(distanceCm);
      lcd.setCursor(8, 0); lcd.print(distanceCm2);
      lcd.setCursor(3, 1); lcd.print("banjir!!");
      digitalWrite(buzzerPin, LOW); // Mematikan buzzer
      delay(500); // Delay selama 1 detik
    }
  }

 
}