#include <ThingSpeak.h>
#include <ESP8266WiFi.h>
char ssid[] = "IOT_LAB";
char pass[] = "Iot_Lab@367"; 
const int LM35Pin = A0; 
const unsigned long myChannelNumber=3052491;
const char* myWriteAPIKey = "G9WXI43STV9K2QDA"; 
int LM;
WiFiClient client;
void setup() {
  Serial.begin(9600);
  ThingSpeak.begin(client);
}
void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("Attempting to connect to WiFi...");
    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);
      Serial.print(".");
      delay(5000);
  }
    Serial.println("\nConnected.");
  }
  LM = analogRead(A0);
  float temp = (LM*(3.0/1023.0))*100;
  Serial.print("Temperature = ");
  Serial.print(temp);
  Serial.println(" *C");
  ThingSpeak.setField(1, temp);
  int statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (statusCode == 200) {
    Serial.println("Channel update successful.");
  } 
  else {
    Serial.print("Problem writing data. HTTP error code:");
    Serial.println(statusCode);
  }
  delay(15000);
}