#include<Servo.h>
Servo microservo;
int pos=0;
int temp;
int tempPin = 2; // analog input pin
int sampleTime = 10000;
int i=0;
#define trigPin 7
#define echoPin 6
#define led 11
#define led2 10
 const int sensorPin= 0;

int smoke_level;
 long duration, distance;



void setup()
{
  // Open serial connection.
  Serial.begin(9600);
  pinMode(9,OUTPUT);
  pinMode(13,OUTPUT);
   pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(led2, OUTPUT);
  
pinMode(sensorPin, INPUT);//the smoke sensor will be an input to the arduino

  
  microservo.attach(5);
  Serial.write('1000');

  
}

void loop()
{ 
  


smoke_level= analogRead(sensorPin); //arduino reads the value from the smoke sensor
//prints just for debugging purposes, to see what values the sensor is picking up
if(smoke_level > 200)
{ //if smoke level is greater than 200, the buzzer will go off
digitalWrite(2, HIGH);
digitalWrite(13,HIGH);
delay(10000);
digitalWrite(13,LOW);
 for(pos = 0; pos < 180; pos += 3)  // goes from 0 degrees to 180 degrees 
                {                                  // in steps of 1 degree 
                  microservo.write(pos);              // tell servo to go to position in variable 'pos' 
                  delay(15);                       // waits 15ms for the servo to reach the position 
                } 

}
else
{
digitalWrite(2, LOW);
}


  
  if(Serial.available() > 0)  // if data present, blink
   {
    char inByte = Serial.read();
    switch(inByte)
  {
    case'a':
  
  {
    digitalWrite(9,HIGH);
    Serial.println("                        LED IS ON ");
    Serial.write('\n');
     Serial.write('0');
  }  
     break;
   
   case'b':
   
     digitalWrite(9,LOW);
     Serial.println("                       LED IS OFF ");
    Serial.write('\n');
     Serial.write('0');
     break;
   
   case'c':
   digitalWrite(13,HIGH);
   Serial.println("                         FAN IS ON ");
    Serial.write('\n');
   Serial.write('0');
   break;
   
   case'd':
   digitalWrite(13,LOW);
  Serial.println("                          FAN IS OFF ");
    Serial.write('\n'); 
   Serial.write('0');
   break;
   
   case'e':
   for(pos = 0; pos < 180; pos += 3)  // goes from 0 degrees to 180 degrees 
                {                                  // in steps of 1 degree 
                  microservo.write(pos);              // tell servo to go to position in variable 'pos' 
                  delay(15);                       // waits 15ms for the servo to reach the position 
                } 
   Serial.println("                       DOOR IS OPEN ");
    Serial.write('\n');             
  Serial.write('0');
  break;
  
  case'f':
    for(pos = 180; pos>=1; pos-=3)     // goes from 180 degrees to 0 degrees 
                {                                
                  microservo.write(pos);              // tell servo to go to position in variable 'pos' 
                  delay(15);                       // waits 15ms for the servo to reach the position 
                } 
    Serial.println("                     DOOR IS CLOSED ");
    Serial.write('\n');            
   Serial.write('0');
  break;
  
  case'g':
  //gets and prints the raw data from the lm35
{
  temp = analogRead(tempPin);
  
  //converts raw data into degrees celsius and prints it out
  // 500mV/1024=.48828125
  temp = temp * 0.48828125;
  Serial.write('\n');
  Serial.print(" CELSIUS: ");
  Serial.print(temp);
   
  Serial.write(temp);
  Serial.println("*C");
  //converts celsius into fahrenheit 
  temp = temp *9 / 5;
  temp = temp + 32;
  Serial.print(" FAHRENHEIT: ");
  Serial.print(temp);
  Serial.write(temp);
  Serial.println("*F");
  
  
  
  Serial.write('0');
  break;
} 

case 'h':
{
  
do
 {
 
  digitalWrite(trigPin, LOW);  // Added this line
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPin, HIGH);
//  delayMicroseconds(1000); - Removed this line
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  if (distance <= 6) 
  
  { 
    digitalWrite(led,HIGH); // When the Red condition is met, the Green LED should turn off
  digitalWrite(led2,LOW);
  
  
  
  Serial.print(" Intrusion is Detected and distance is");
    digitalWrite(2,HIGH);
  delay(3000);
  Serial.write('0');
 
  

  }
  
  
  else
  {
    digitalWrite(led,LOW);
    digitalWrite(led2,HIGH);
  }
  
  if (distance >= 200 || distance <= 0)
  {
    
    Serial.println("Out of range");
  }
  else {
    Serial.print(distance);
    Serial.println(" cm");
  }
  delay(500);
}

while(distance>6);
Serial.write('0');
break;
}
    default:
    Serial.println("wrong value recieved by arduino");
    Serial.write('0');
    break;
 }
 
 
   }
 
}