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

DHTesp dht;
TempAndHumidity data;
// Thingspeak connectivity variable Declaration
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2621771;
const char * myWriteAPIKey = "ZILVYR91H7ACF11V";
int statusCode;

void setup() {
// put your setup code here, to run once:
  Serial.begin(115200);
   //wifi and thingspeak mode setup
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
   pinMode(25, OUTPUT);
   pinMode(26, INPUT);
   dht.setup(27,DHTesp::DHT22);
}

void loop() {
  // put your main code here, to run repeatedly:
  //wifi connection setup
   if(WiFi.status() != WL_CONNECTED)
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  }

 digitalWrite(25, HIGH);
 delay(100);
 digitalWrite(25, LOW);
 float duration=pulseIn(26,HIGH);
 int distance= duration * 0.034/2;
 Serial.println(distance);
 data = dht.getTempAndHumidity();
 Serial.println("Temperature");
 Serial.println(data.temperature);
 Serial.println("Humidity");
 Serial.println(data.humidity);
 delay(1000);// this speeds up the simulation

  ThingSpeak.setField(1, distance);
  ThingSpeak.setField(2, data.temperature);
  ThingSpeak.setField(3, data.humidity);

  //Thingspeak response
  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
  if(statusCode == 200) { //successful writing code
  Serial.println("Channel update successful.");
  }
  else {
  Serial.println("Problem Writing data. HTTP error code :" +String(statusCode));
  }
  delay(15000);
}