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

char ssid[] = "Wokwi-GUEST";
char pass[] ="";
WiFiClient client;
unsigned long myChannelNumber = 2610240;
const char * myWriteAPIKey = "G33C150WNV3LXHTR";
int statusCode;
int led;

DHTesp sensor;
TempAndHumidity data;
int pin=26;
int trig =13;
int echo =27;
long distance  , duriation;
void setup() {
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  sensor.setup(pin,DHTesp::DHT22);
  // put your setup code here, to run once:
  Serial.begin(115200);
   pinMode(trig,OUTPUT);
  pinMode(echo, INPUT);
  pinMode(25, OUTPUT);
  // put your setup code here, to run once:
  Serial.println("Hello, ESP32!");
}

void loop() {
  connectToCloud();
  writeData();

   data=sensor.getTempAndHumidity();
Serial.println(String(data.temperature)+"this is Temperature");
Serial.println("");
Serial.println(String(data.humidity)+"this is humidity");
 digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duriation = pulseIn(echo,HIGH);
  distance = (duriation * 0.034)/2+1;
  Serial.println(distance);
  // put your main code here, to run repeatedly:
  delay(2000);
   if (distance<100 && data.temperature>30)
  {
    digitalWrite(25, HIGH);
    ThingSpeak.setField(4,"1");
  }
  else{
    digitalWrite(25, LOW);
    ThingSpeak.setField(4,"0");
  }

}
void connectToCloud(){
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid,pass);
      Serial.print(".");
      delay(1000);
    }
  }
  Serial.println("\nConnected.");

    }


    void writeData(){
      ThingSpeak.setField(1,distance);
      ThingSpeak.setField(2,data.humidity);
      ThingSpeak.setField(3,data.temperature);
      
      statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
      if (statusCode == 200)
      Serial.println("Channel update succesful.");
      else
      Serial.println("Problem Writing data. HTTP error code :" + 
      String(statusCode));
      delay(15000);


    }