DS18b20 Temperature sensor interfacing with ESP8266

DS18b20_esp8266.ino

/*
Here is the complete tutorial for this code
http://www.fypsolutions.com/examples/ds18b20-interfacing-with-esp8266-nodemcu-board/

*/

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

#define ONE_WIRE_BUS D1                          //D2 pin of nodemcu

OneWire oneWire(ONE_WIRE_BUS);
 
DallasTemperature ds18b20(&oneWire);            // Pass the oneWire reference to Dallas Temperature.

void setup(void)
{
  Serial.begin(9600); 
  ds18b20.begin();
}

void loop(void)
{ 
  ds18b20.requestTemperatures();                // Send the command to get temperatures  
  Serial.print("Temp: ");
  Serial.println(ds18b20.getTempCByIndex(0));   // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
  delay(500);
}