#include <LCD_I2C.h>
LCD_I2C lcd(0x27, 16, 2); 

float celsius;

void setup()
{ lcd.begin();
  lcd.backlight();
}

void loop()
{ lcd.setCursor(0,0);  lcd.print("     Hello");
  getTemp();  //NTC Temperature sensor
}

void getTemp()
{ const float BETA = 3950; 
  int analogValue = analogRead(A0);
  //NTC Formula
  celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  //LM35 Formula
  //celsius = (analogValue / 1023) * 500;
  lcd.setCursor(0,1);  lcd.print(celsius);
}