#include <DHT.h>;

//Constants
#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
const int pResistor = A0; // Photoresistor at Arduino analog pin A0
const int ledPin1=9;       // Led pin at Arduino pin 9
const int ledPin2=6;


//Variables 
int Relaypin = 7;              
int PIRsensor = 4; 
int state = 0;
int count=0;
int val;
int value;
int chk;
float hum;  //Stores humidity value
float temp; //Stores temperature value

void setup()
{
  pinMode(ledPin1, OUTPUT);  // Set lepPin1 - 9 pin as an output
  pinMode(ledPin2, OUTPUT);  // Set lepPin2 - 6 pin as an output
  pinMode(Relaypin, OUTPUT); // Set Relaypin - 10 pin as an output
  pinMode(pResistor, INPUT); // Set pResistor - A0 pin as an input (optional)
  pinMode(PIRsensor, INPUT); // Set PIRsensor - 4 pin as an input
  Serial.begin(9600);
	dht.begin();

}

void loop()
{
    //Read data and store it to variables hum and temp
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    //Print temp and humidity values to serial monitor
    Serial.print("Humidity: ");
    Serial.print(hum);
    Serial.print(" %, Temp: ");
    Serial.print(temp);
    Serial.println(" Celsius");
    delay(2000); //Delay 2 sec.
    //If DHT 22 reads temperature greater than 30° it on the fan else it off
    if(temp > 30)
    {
     digitalWrite(Relaypin, HIGH);

    }
    else
    {
     digitalWrite(Relaypin, LOW); 
    }
  
    Serial.print("Photo Resistor : ");
    value = analogRead(pResistor);

    Serial.println(value);
    //You can change value "25"
    if (value > 900)
    {
      analogWrite(ledPin1, 255);  //Turn led on
    }
    else if (value > 700)
    {
      analogWrite(ledPin1, 180); //Turn led on
    }
    else if (value > 400)
    {
      analogWrite(ledPin1, 100); //Turn led on
    }
    else if (value > 200)
    {
      analogWrite(ledPin1, 50); //Turn led on
    }
    else
    {
      analogWrite(ledPin1, 0); //Turn led off
    }
    delay(500); //Small delay
    val = digitalRead(PIRsensor);  
    if(val == 1 && state == 0)
    {
    Serial.println("\nMotion is detected");
    digitalWrite(ledPin2, HIGH);
    count++;
    state = 1;
    Serial.print("\nTotal count is: ");
    Serial.print(count);
    Serial.print("\n");
    delay(10000);
    }
    else if (val == 0 && state == 1)
    {
    digitalWrite(ledPin2, LOW);
    state = 0;
  }
}