#include "ThingSpeak.h"
const int LM35 = A0;
char ssid[] = "IOT_LAB";
char pass[] = "Iot_Lab@367";
WiFiClient client;
int stat;
float temp;
unsigned long myChannelNumber = 3058182;
const char* myWriteAPIKey = "H73RV5NYMX1SLR03";
void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, pass); 
  ThingSpeak.begin(client);
}
void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED) {
      Serial.print(".");
      delay(1000);
    }
    Serial.println("\nConnected to WiFi");
  }
  int ADC = analogRead(LM35);
  // Convert ADC value to voltage (3.3V ref) and then to temperature (LM35 = 10mV/°C)
  temp = (ADC * 3.3 / 1023.0) * 100.0;
  Serial.print("Temperature = ");
  Serial.print(temp);
  Serial.println(" °C");
  upload();
  delay(2000); 
}
void upload() {
  ThingSpeak.setField(1, temp);
  stat = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (stat == 200) {
    Serial.println("Value Uploaded");
  } else {
    Serial.print("Error Occurred: ");
    Serial.println(stat);
  }
}