#include <DHTesp.h>
#include<WiFi.h>
#include<ThingSpeak.h>

char ssid[]="Wokwi-GUEST";// default user name for wifi
char pass[]="";
WiFiClient client;// structure variable, definition inside wifi

unsigned long myChannelNumber = 2231201;
const char * myWriteAPIKey = "ZSYPOEHO5WY8PTVJ";

int statuscode;


DHTesp dhtSensor; //structure variable
TempAndHumidity data; //structure variable, humidity and temperature is stored in this structure
const int DHT_PIN = 14;

void setup() 
{
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN,DHTesp::DHT22);
  WiFi.mode(WIFI_STA); //connect to wifi simulator
  ThingSpeak.begin(client);  // connect to thingspeak
}

void loop() 
{
  data = dhtSensor.getTempAndHumidity();// retures humidity and temp. values
  Serial.println("Humi: " + String(data.humidity,1));
  Serial.println("Temp: " + String(data.temperature,2));
  Serial.println("-----------------");


  if(WiFi.status() != WL_CONNECTED)
    {
      Serial.println("Attempting to Connect");
      while(WiFi.status() != WL_CONNECTED)
      {
        WiFi.begin(ssid,pass);
        Serial.print(".");
        delay(5000);
      }
      Serial.println("\nConnected");
    }
  
  ThingSpeak.setField(1, data.humidity);
  ThingSpeak.setField(2, data.temperature);
  statuscode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  if(statuscode == 200) //200 indicates success update
  {
     Serial.println("Channel Update Successful");
  }
  else
  {
    Serial.println("Problem in writing Data:" + String(statuscode));
  }
  delay(30000);
}