#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 20 chars and 4 line display

const float BETA = 3950; // should match the Beta Coefficient of the thermistor

int ThermistorPin = 0;
int Vo;
int Svalue = 0;
float R1 = 3950;
float logR2, R2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;

const int DIN_PIN = 2;

void setup()
{
 Serial.begin( 9600 );
 
 lcd.init();
 lcd.backlight();
 lcd.setCursor(4,0);
 lcd.print("Temperature: ");

 pinMode(2, INPUT_PULLUP); 
}


void loop()
{ 
 int analogValue = analogRead(A0);
 float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
 Svalue = digitalRead( DIN_PIN );

if (Svalue == 0){  
  lcd.setCursor(7,1);
  lcd.print(celsius);
  lcd.print("C  ");
  Serial.print("Celcius ");
  Serial.println( Svalue );

}
else if (Svalue == 1){
  lcd.setCursor(7,1);
  lcd.print(celsius*9/5+32);
  lcd.print("F  ");
  Serial.print("Farenheit ");
  Serial.println( Svalue );
}
else {
  lcd.setCursor(0,1);
  lcd.print("Switch Error");
  Serial.println("Switch Error");
}

}