/*
https://create.arduino.cc/projecthub/everth-villamil-ruiz/temperature-sensor-ds18b20-3decfc
*/

//Include libraries
#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

void setup(void)
{
  Serial.begin(9600); //Begin serial communication
  Serial.println("Arduino Digital Temperature // Serial Monitor Version"); //Print a message
  sensors.begin();
}

void loop(void)
{ 
  // Send the command to get temperatures
  sensors.requestTemperatures();  
  Serial.print("Temperature is: ");
  Serial.println(sensors.getTempCByIndex(0)); // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
  //Update value every 1 sec.
  delay(1000);
}


- - - - - or - - - - -



/*
https://create.arduino.cc/projecthub/TheGadgetBoy/ds18b20-digital-temperature-sensor-and-arduino-9cc806
*/

/* YourDuino TEST: Temperature Sensor DS18B20
 *  V1.2 08-26-2016
- Connect cable to Arduino Digital I/O Pin 2
terry@yourduino.com */

/*-----( Import needed libraries )-----*/
#include <OneWire.h>
#include <DallasTemperature.h>

/*-----( Declare Constants )-----*/
#define ONE_WIRE_BUS 2 /*-(Connect to Pin 2 )-*/

/*-----( Declare objects )-----*/
/* Set up a oneWire instance to communicate with any OneWire device*/
OneWire ourWire(ONE_WIRE_BUS);

/* Tell Dallas Temperature Library to use oneWire Library */
DallasTemperature sensors(&ourWire);

/*-----( Declare Variables )-----*/


void setup() /*----( SETUP: RUNS ONCE )----*/
{
/*-(start serial port to see results )-*/
delay(1000);
Serial.begin(9600);
Serial.println("YourDuino.com: Temperature Sensor Test Program");
Serial.println("Temperature Sensor: DS18B20");
delay(1000);

/*-( Start up the DallasTemperature library )-*/
sensors.begin();
}/*--(end setup )---*/


void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
Serial.println();
Serial.print("Requesting temperature...");
sensors.requestTemperatures(); // Send the command to get temperatures
Serial.println("DONE");

Serial.print("Device 1 (index 0) = ");
Serial.print(sensors.getTempCByIndex(0));
Serial.println(" Degrees C");
Serial.print("Device 1 (index 0) = ");
Serial.print(sensors.getTempFByIndex(0));
Serial.println(" Degrees F");
delay(5000);
}/* --(end main loop )-- */