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

// Define the pin where the DS18B20 is connected
const int oneWireBus = 2; // Change this according to your setup

// Setup a oneWire instance to communicate with the DS18B20
OneWire oneWire(oneWireBus);
DallasTemperature sensors(&oneWire);

void setupTemperatureSensor() {
  sensors.begin();
}

float readTemperature() {
  sensors.requestTemperatures();
  return sensors.getTempCByIndex(0);
}