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

#define TRIG_PIN  26 
#define ECHO_PIN  25 
#define LED_PIN   34 
#define DISTANCE_THRESHOLD 50 

OneWire ourWire(4); 
DallasTemperature DS18B20(&ourWire); 

void setup()
{
Serial.begin(115200); 
DS18B20.begin(); 
}

void loop()
{
DS18B20.requestTemperatures(); 
float tem= DS18B20.getTempCByIndex(0); 
Serial.print("Temperatur= ");
Serial.print(tem);
Serial.println(" °C");
delay(1000);
}