Thermistor, Node MCU and Blynk App

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>

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

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "YOUR_SSID";  //Enter your WIFI Name
char pass[] = "YOUR_PASSWORD";  //Enter your WIFI Password

int ThermistorPin = 0; //USE Analog Pin A0 for the input of thermistor value [0 or A0 both works]
int Vo;
float R1 = 10000;
float logR2, R2, T, Tc, Tf;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;

SimpleTimer timer;
void sendSensor()
{

  Vo = analogRead(ThermistorPin); // Analog Value read from thermistor pin A0

  R2 = R1 * (1023.0 / (float)Vo - 1.0); //Mapping of the Data
  logR2 = log(R2); // Log of Mapped Data
  T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2)); // Convert data to temperature relevant data
  Tc = T - 273.15; //Temperature in Celcius
  Tf = (Tc * 9.0)/ 5.0 + 32.0; //Temperature in Fareinheit

  Serial.print("Temperature: ");
  Serial.print(Tc);
  Serial.println(" C");
  Blynk.virtualWrite(V4, Tc); //Virtual Pin for the data display in the APP
}

void setup()
{
  Serial.begin(115200); // See the connection status in Serial Monitor
  Blynk.begin(auth, ssid, pass);
  // Setup a function to be called every second
  timer.setInterval(1000L, sendSensor);
}

void loop()
{
  Blynk.run(); // Initiates Blynk
  timer.run(); // Initiates SimpleTimer
}