#include <LiquidCrystal_I2C.h>
#define ECHO_PIN 5
#define TRIG_PIN 6
#define buzzer 7
#define m 13
#define k 12
#define h 11
LiquidCrystal_I2C lcd(0x27,20,4);

void setup() {
  pinMode(m, OUTPUT);
  pinMode(k, OUTPUT);
  pinMode(h, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  
  digitalWrite(m, HIGH);
  digitalWrite(k, HIGH);
  digitalWrite(h, HIGH);

  tone(7,1000,700);

  lcd.setCursor(1,0);
  lcd.print("DETEKTOR BANJIR");
  lcd.setCursor(2,1);
  lcd.print("PEMDES SLEMAN");
  delay(2000);
  lcd.clear();

  lcd.setCursor(1,0);
  lcd.print("DIPERSEMBAHKAN");
  lcd.setCursor(3,1);
  lcd.print("BINTANG A.B");
  delay(2000);
  lcd.clear();

  
  digitalWrite(m, LOW);
  digitalWrite(k, LOW);
  digitalWrite(h, LOW);
  lcd.clear();\
  }

  float kedalaman(){
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int durasi = pulseIn(ECHO_PIN, HIGH);
  return 400-durasi*0.034/2;
  }

void loop() {
    float kdlm = kedalaman();
 if(kdlm > 370)
 {
    digitalWrite(m, HIGH);
    digitalWrite(k, LOW);
    digitalWrite(h, LOW);

    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Kdlmn :");
    lcd.setCursor(7,0);
    lcd.print(kdlm);

    lcd.setCursor(14,0);
    lcd.print("cm");
    lcd.setCursor(0,1);
    lcd.print("Satus :");
    lcd.setCursor(9,1);
    lcd.print("Bahaya");

    tone(7,800,1000);
    delay(1000);

    lcd.clear();
    delay(100);
 }
 else{
   if(kdlm >= 320 && kdlm < 370)
 {
    digitalWrite(m, LOW);
    digitalWrite(k, HIGH);
    digitalWrite(h, LOW);

    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Kdlmn :");
    lcd.setCursor(7,0);
    lcd.print(kdlm);

    lcd.setCursor(14,0);
    lcd.print("cm");
    lcd.setCursor(0,1);
    lcd.print("Satus :");
    lcd.setCursor(9,1);
    lcd.print("Siaga");

    //digitalWrite(buzzer, LOW);
    delay(1000);
    lcd.clear();
    delay(100);
 }
  else{
    digitalWrite(m, LOW);
    digitalWrite(k, LOW);
    digitalWrite(h, HIGH);

    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Kdlmn :");
    lcd.setCursor(7,0);
    lcd.print(kdlm);

    lcd.setCursor(14,0);
    lcd.print("cm");
    lcd.setCursor(0,1);
    lcd.print("Satus :");
    lcd.setCursor(9,1);
    lcd.print("Aman");
    //digitalWrite(buzzer, LOW);
    
    delay(1000);
    lcd.clear();
    delay(100);
  }
   }


}