Particle Photon + DS18B20 with Blynk

Need Help With My Project
4

I’m now using this Code with a timer. But still -127°C in Blynk.

#include <SparkCorePolledTimer.h>

// This #include statement was automatically added by the Particle IDE.
#include <blynk.h>

// This #include statement was automatically added by the Particle IDE.
#include <OneWire.h>

// This #include statement was automatically added by the Particle IDE.
#include "spark-dallas-temperature.h"


// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxxxxxxxxxxxxxxxxxxxxxxxxx";

//#define SensorPin 2

OneWire oneWire(D2);
DallasTemperature sensors(&oneWire);

double tempc = 0.0;

BlynkTimer timer;

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void sendSensor()
{
  sensors.requestTemperatures();
  double tempCheck = sensors.getTempCByIndex(0);
  tempc = (double) tempCheck;


  Blynk.virtualWrite(V5, tempCheck);
}

void setup()
{
  // Debug console
  Serial.begin(9600);

  delay(5000); // Allow board to settle
  Blynk.begin(auth);
  
  Particle.variable("tempc", &tempc, DOUBLE);

sensors.begin();
    

  // Setup a function to be called every second
  timer.setInterval(1000L, sendSensor);
}

void loop()
{
  Blynk.run();
  timer.run();
}