#include <DHTesp.h>
#include <WiFi.h>
#include<ThingSpeak.h>
char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;
unsigned long myChannelNumber=2078922; 
const char*myWriteAPIKey="C3HLTIF7O12J3I6U";
int statusCode;
const int dhtpin=15;
DHTesp dhtsensor;
TempAndHumidity data;
const int trig=2;
const int echo=4;
long duration;
int distance;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(trig,OUTPUT);
  pinMode(echo, INPUT);
  dhtsensor.setup(dhtpin,DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
    ThingSpeak.begin(client);
}

void loop() 
 {data=dhtsensor.getTempAndHumidity();
  Serial.println("humidity:"+String(data.humidity));
  Serial.println("temperature:"+String(data.temperature));
  digitalWrite(trig, LOW);
  delayMicroseconds(20);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration=pulseIn(echo,HIGH);
  distance=duration*0.034/2+1;
  Serial.println("DISTANCE:"+String(distance));
  
  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");
   ThingSpeak.setField(1,data.humidity);
   ThingSpeak.setField(2,data.temperature);
   ThingSpeak.setField(3,distance);

   statusCode=ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
   
   if(statusCode==200)
   {
     Serial.println("Channel update sucessful");

   }
   else
   {
     Serial.println("problem Writing Data:HTTp error code :"+String(statusCode));

   }
   delay(15000);
 }