#include <Arduino.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#define ONE_WIRE_BUS D2
//OneWire oneWire(ONE_WIRE_BUS);  
//OneWire ourWire(D2);
OneWire ourWire(4);
DallasTemperature sensors(&ourWire);
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  sensors.begin();
}
void loop() {
  // put your main code here, to run repeatedly:
    Serial.print("Requesting temperatures...");
  sensors.requestTemperatures(); // Send the command to get temperatures
  Serial.println("DONE");
  // After we got the temperatures, we can print them here.
  // We use the function ByIndex, and as an example get the temperature from the first sensor only.
  float tempC = sensors.getTempCByIndex(0);
   Serial.println(tempC);

  // Check if reading was successful
  if(tempC != DEVICE_DISCONNECTED_C) 
  {
    Serial.print("Temperature for the device 1 (index 0) is: ");
    Serial.println(tempC);
  } 
  else
  {
    Serial.println("Error: Could not read temperature data");
  }
  delay(10); // this speeds up the simulation
}