#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

//temperature-sensor
const float BETA = 3950;

void setup() {
  //temperature-sensor
  Serial.begin(9600);

  //LCD 
  lcd.init();
  lcd.backlight();
}

void loop() {
  //temperature-sensor 
  int analogValue = analogRead(A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  
  //LCD 
  lcd.setCursor(12, 0);
  lcd.print(celsius);
  int second = millis()/1000;
  if(second/12%2>0){
    lcd.scrollDisplayRight();
  }else{
    lcd.scrollDisplayLeft();
  }
  delay(1000);

  
}