Lösung: Digitaler Temperatursensor DS18B20

Der Dallas DS18B20 Temperatursensor ist ein One-Wire Digitalsensor.

Anschluss 18B20 (diskret mit 4,7k Pull Up-Widerstand)

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

// Data wire is connected to the Arduino digital pin 2
#define ONE_WIRE_BUS 2

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

// Pass our oneWire reference to Dallas Temperature sensor 
DallasTemperature sensors(&oneWire);

void setup(void)
{
  // Start serial communication for debugging purposes
  Serial.begin(9600);
  // Start up the library
  sensors.begin();
}

void loop()
{ 
  // Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus
  sensors.requestTemperatures();   
  Serial.print("Celsius temperature: ");
  // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
  Serial.print(sensors.getTempCByIndex(0)); 
  Serial.print(" °Celsius temperature: ");
  Serial.println(sensors.getTempFByIndex(0));
  delay(1000);
}