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

#define ONE_WIRE_BUS 2  // DS18B20 connected to D2

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27

void setup() {
  Serial.begin(9600);
  sensors.begin();
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Temp Logger");
  delay(2000);
  lcd.clear();
}

void loop() {
  sensors.requestTemperatures();
  float tempC = sensors.getTempCByIndex(0);
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(tempC);
  lcd.print(" C");

  Serial.print("Temperature: ");
  Serial.print(tempC);
  Serial.println(" *C");

  delay(2000); // log every 2 seconds
}