#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>

// Data wire is plugged into digital pin 6 on the Arduino
#define ONE_WIRE_BUS 6

// Setup a oneWire instance to communicate with any OneWire device
OneWire oneWire(ONE_WIRE_BUS);  

// Pass oneWire reference to DallasTemperature library
DallasTemperature sensors(&oneWire);

// I2C address 0x27, 16 column and 2 rows
LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup(void)
{
  sensors.begin();  // Start up the library
  Serial.begin(9600);
  lcd.init(); // initialize the lcd
  lcd.backlight();
}

void loop(void)
{ 
  lcd.clear();  // clear display

  // Send the command to get temperatures
  sensors.requestTemperatures(); 
  float temperature = sensors.getTempCByIndex(0);
  
  lcd.setCursor(0, 0);         // move cursor to   (0, 0)
  lcd.print("Temp.: ");
  lcd.print(temperature);
  lcd.print((char)176);  //shows degrees character
  lcd.print("C");

  //print the temperature in Celsius
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print((char)176);//shows degrees character
  Serial.print("C | ");

  if(temperature < 18.00 || temperature > 25.00){
    lcd.setCursor(1,1);
    lcd.print("t out of range ");
    Serial.println("t out of range");
  }

  delay(1000);
}