NodeMCU and Blynk with LM35

1//Made for arduino
2//by ArduiCreate
3//if any problems pls email  to sumithaak@gmail.com
4//Thanks
5#include <ESP8266WiFi.h>//Install these library
6#include  <BlynkSimpleEsp8266.h>
7#include <SimpleTimer.h>
8
9#define BLYNK_PRINT Serial
10
11float  vref = 3.3;
12float resolution = vref / 1023.0;
13float temperature;
14
15char  auth[] = "auth";//yourauthtoken
16char ssid[] = "name of wifi";//name of your  wifi
17char pass[] = "password";//password of wifi
18
19SimpleTimer timer;
20
21void  setup()
22{
23  Serial.begin(9600);
24  Blynk.begin(auth, ssid, pass);
25  timer.setInterval(2000,  sendUptime);
26}
27
28void sendUptime()
29{
30  float temperature = analogRead(A0);//lm35  is connected to pin A0 on NodeMcu
31  temperature = (temperature * resolution);
32  temperature = temperature * 100.0;
33  Serial.print("LM35 temperature: ");//serial  print the value 
34  Serial.println(temperature);
35  Blynk.virtualWrite(V0, temperature);//send  the value to blynk application
36}
37
38void loop()
39{
40  Blynk.run();
41  timer.run();
42}
43//Thanks for your use
44