#include <Wire.h>  
  #include <LiquidCrystal_I2C.h> 
  LiquidCrystal_I2C lcd(0x27,16,2); 
   
  const int trigger_pin = 10; 
  const int echo_pin = 11; 
   
  int sure; 
  float mesafe; 
  float c; 
  float h; 
  float sesh; 
   
  void setup()  
  { 
    lcd.init(); 
    lcd.backlight(); 
    pinMode(trigger_pin, OUTPUT); 
    pinMode(echo_pin, INPUT); 
   
    Serial.begin(9600); 
  } 
  void loop()  
  { 
    delay(150); 
    c = analogRead(A0); 
    c = c * ((5.0*1000/1023)/10); 
    sesh = (0.6*c)+331.5; 
    h = (sesh*100)/1000000; 
    h = 1/h; 
     
    digitalWrite(trigger_pin, HIGH); 
    delay(1); 
    digitalWrite(trigger_pin, LOW); 
    sure= pulseIn(echo_pin, HIGH); 
    mesafe = (sure/2) /h; 
   
    lcd.clear(); 
    Serial.println(mesafe); 
    Serial.println(c); 
    Serial.println(h); 
    lcd.print(mesafe); 
    lcd.print(" cm"); 
    lcd.setCursor(9, 0); 
    lcd.print(c); 
    lcd.print(" C"); 
    lcd.setCursor(0, 1); 
    lcd.print(sesh); 
    lcd.print(" m/sn "); 
    lcd.blink();   
  }