#include <DHT.h>
// dht header

#include<WiFi.h>
//wifi header

#include<ThingSpeak.h>
//Thingspeak header

const int dhtPin = 15;
DHT dht22(dhtPin,DHT22);
//dht declaration

const int trigPin = 4;
const int echoPin = 16;
//ultrasonic declaration

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
//wifi declaration

long int myChannelId = 2615069 ;
char myWriteApiKey[] = "MIAXB0SOUWSAU1WU";
int statusCode;
//Thingspeak declaration


void setup() {
  Serial.begin(115200);
  //common
  dht22.begin();
  //dht setup

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  //ultrasonic setup

  WiFi.mode(WIFI_STA);
  Serial.print("Attempting to connect");
  while(WiFi.status()!=WL_CONNECTED)
  {
    WiFi.begin(ssid,pass);
    Serial.print(".");
    delay(5000);
  }
  Serial.println("\nConnected");
  //WiFi setup

  ThingSpeak.begin(client);
  //Thingspeak setup
}

void loop() {
  int humidity = dht22.readHumidity();
  int temp = dht22.readTemperature();
  Serial.println(humidity);
  Serial.println(temp);
  //dht loop

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  int duration = pulseIn(echoPin,HIGH);
  int distance = duration * 0.034 / 2;
  Serial.println(distance);
  // ultrasonic loop

  ThingSpeak.setField(1,humidity);
  ThingSpeak.setField(2,temp);
  ThingSpeak.setField(3,distance);
  statusCode = ThingSpeak.writeFields(myChannelId,myWriteApiKey);
  if(statusCode==200)
    Serial.println("Value Uploaded");
  else
    Serial.println("Not Uploaded");
  delay(15000);
  //ThingSpeak loop
  }