#include<DHT.h>// import dht library
#include<WiFi.h>// import wifi library
#include<ThingSpeak.h>// import thingspeak library

int trigpin = 13;
int echopin = 12;
//ultrasonic initialization

int dhtpin = 15;
DHT dht22(dhtpin,DHT22);
//dht initialization

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

long int mychannelid = 2653230;
char mywriteapikey[] = "1F4HMLPKKBZR5SP8";
//thingspeak initialization


void setup() {
  Serial.begin(115200);

  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  //ultrasonic setup

  dht22.begin();
  //dht 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() {
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin, LOW);
  int duration = pulseIn(echopin,HIGH);
  int distance = duration * 0.034/2;
  Serial.println(distance);
  //ultrasonic loop code

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

  ThingSpeak.setField(1,humidity);
  ThingSpeak.setField(2,temp);
  ThingSpeak.setField(3,distance);
  int statuscode = ThingSpeak.writeFields(mychannelid,mywriteapikey);
  if(statuscode == 200)
    Serial.println("Data uploaded");
  else
    Serial.println("Problem writing data");
  delay(15000);



}