#include <Servo.h>


int sen1Value = 0;
int sen2Value = 0;
int const LDR = A0;


long readUltrasonicDistance(int triggerPin, int echoPin)
{
  pinMode(triggerPin, OUTPUT);  // Clear the trigger
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  // Sets the trigger pin to HIGH state for 10 microseconds
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  pinMode(echoPin, INPUT);
  // Reads the echo pin, and returns the sound wave travel time in microseconds
  return pulseIn(echoPin, HIGH);
}

Servo servo_7;

void setup()
{
  Serial.begin(9600);		//initialize serial communication
  pinMode(LDR, INPUT);		//LDR
  pinMode(13, OUTPUT);		//connected to led
  servo_7.attach(4, 500, 2500); //servo motor

  pinMode(5, OUTPUT);     	//signal to piezo buzzer
  pinMode(6, INPUT);		//signal to PIR
  pinMode(12, OUTPUT);		//Red LED
  pinMode(11, OUTPUT);		//Green LED

}

void loop()
{

  //------light intensity control------//
  //--------------------------------------------------------------
  int val1 = analogRead(LDR);
  sen2Value = digitalRead(6);
  if ((val1 < 500) || (sen2Value == LOW))
  {
    digitalWrite(13, LOW);
    Serial.print("Bulb OFF = ");
    Serial.print(val1);

    if (sen2Value == LOW) {
      digitalWrite(12, HIGH); // Red LED ON,indicating no motion
      digitalWrite(11, LOW);
      Serial.print("     || NO Motion Detected    " );
    }
    if (sen2Value == HIGH) {
      digitalWrite(12, LOW); // RED LED OFF
      digitalWrite(11, HIGH);
      Serial.print(" 	   || Motion Detected!      " );


    }
  }

  else if ((val1 > 500) &&  (sen2Value == HIGH))
  {

    digitalWrite(13, HIGH);
    Serial.print("Bulb ON = ");
    Serial.print(val1);



    digitalWrite(12, LOW); // RED LED OFF
    digitalWrite(11, HIGH);
    Serial.print(" 	   || Motion Detected!      " );

  }





  /*
    --------------------------------------------------------------
       -------  servo motor  ---------
    -----------------------------------------------------------
  */
  sen1Value = 0.01723 * readUltrasonicDistance(2, 3);

  if (sen1Value < 100)
  {

    servo_7.write(90);
    tone(5, 650);

    Serial.print(" 	  || Door Open!  ; Distance = ");
    Serial.print(sen1Value);
    Serial.print("\n");



  }
  else
  {

    servo_7.write(0);
    noTone(5);
    Serial.print(" 	  || Door Closed! ; Distance =  ");
    Serial.print(sen1Value);
    Serial.print("\n");

  }
  delay(10); // Delay a little bit to improve simulation performance
}