#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>
WiFiClient client;
DHTesp Saleth;
TempAndHumidity data;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
long myChannelNumber =  2616847;
const char * myWriteAPIKey = "3YWQDSJHCCJJNPX4";
int trig=27;
int echo=25;
int statusCode;
float d;

int ultrasonic(){

digitalWrite(trig,LOW);
delay(10);

digitalWrite(trig, HIGH);
delay(100);
digitalWrite(trig, LOW);
d=pulseIn(echo,HIGH);
return(d*0.034/2)+1;
delay(1000);
d=pulseIn(echo,LOW);
tone(23,2000);
}

 
  void setup()  
   {

  ThingSpeak.begin(client);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);
  Saleth.setup(18,DHTesp::DHT22);
  pinMode(23, OUTPUT);
  pinMode(17, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, OUTPUT);

  }

  

void loop()
 {
  ThingSpeak.setField(1, data.temperature);
   ThingSpeak.setField(2, data.humidity);
    ThingSpeak.setField(3, ultrasonic());

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

if(statusCode == 200) { 
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
data=Saleth.getTempAndHumidity();
  Serial.println("Humidity:  "+String(data.humidity));
  Serial.println("Temperature:  "+String(data.temperature));
  Serial.println("----------------");
  Serial.println("distance:   "+String(ultrasonic()));

  
  
  if(WiFi.status() != WL_CONNECTED)
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    
    Serial.print("");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 
  if(data.humidity>20 && data.humidity<70)
  {
  digitalWrite(17, HIGH);
   noTone(23);
   delay(300);
   }
  else if(data.temperature>30 && data.temperature<70)
  {
    digitalWrite(17, LOW);
    digitalWrite(19, HIGH);
    delay(300);
  }
  else if(ultrasonic()>200 && ultrasonic()<500)
  {
   digitalWrite(17, LOW);
   digitalWrite(19, LOW);
   tone(23,1500);
   delay(300);

   }
  else{

  }
  delay(10); // this speeds up the simulation
  }