#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27,16,2);

int trigger=26;
int echo=25;
int light=18;
int buzzer=17;


void setup() {
  // put your setup code here, to run once:
 lcd.init();
 // turn on LCD backlight 
 lcd.backlight();
 lcd.setCursor(0,0);
 delay(1000);

 pinMode(trigger, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(light, OUTPUT);
 pinMode(buzzer, OUTPUT);

 int Ultra_sonic(){
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
 float recieved= pulseIn(echo, HIGH);
 float converted=(recieved*0.034/2)+1;
 return(converted);
delay(1000);
}


}

void loop() {
  
  int actual_distance=Ultra_sonic();
  Serial.println(actual_distance);
  delay(100);
 lcd.clear();
  if(actual_distance<=250){
    digitalWrite(light, HIGH);
    tone(buzzer,5000);
   
    lcd.setCursor(0,0);
    lcd.println("water level incresd");
    lcd.setCursor(0,1);
    lcd.println("goto safe area");
    delay(1000);
    
   
   
  }

   else if(actual_distance>=251);{
    digitalWrite(light, LOW);
    noTone(buzzer);
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.print("safe condition");
    delay(1000);
  
  }
}