# include <LiquidCrystal_I2C.h>
const float BETA = 3950;

LiquidCrystal_I2C lcd(0x27, 20, 4);   // LCD Namen zuweisen

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

void loop()  
{ 
  // Anzeige LCD
  lcd.clear();
  lcd.setCursor(0, 0);

  int analogValue = analogRead(A0);
  
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  lcd.print("Temp.: ");
  lcd.print(celsius);
  lcd.print(" \337C");

  delay(1000);
}