Code for Interfacing DS18B20 Temperature Sensor with Arduino.

Arduino_DS18B20_Tutorial.ino

#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal.h>
#define DS18B20 8

OneWire ourWire(DS18B20);
DallasTemperature sensor(&ourWire);
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
byte degree_symbol[8] = 
              {
                0b00111,
                0b00101,
                0b00111,
                0b00000,
                0b00000,
                0b00000,
                0b00000,
                0b00000
              };
void setup()
{
   Serial.begin(9600); 
   delay(1000);
   sensor.begin();
   lcd.begin(16, 2);
   lcd.createChar(1, degree_symbol);
   lcd.setCursor(0,0);
   lcd.print("    Digital    ");
   lcd.setCursor(0,1);
   lcd.print("  Thermometer   ");
   delay(4000);
   lcd.clear();
   lcd.setCursor(0,0);
   lcd.print("Temp - ");
}

void loop()
{
   sensor.requestTemperatures();
   Serial.print(sensor.getTempCByIndex(0));
   Serial.println("°C");
   lcd.setCursor(7,0);
   lcd.print(sensor.getTempCByIndex(0));
    lcd.write(1);
    lcd.print("C");
   delay(1000);
}