#include <LiquidCrystal.h>
#include <dht.h> 
dht DHT;

String text;
String value;
int var;
int i;

// rs,e,d4,d5,d6,d7
//LiquidCrystal lcd(22, 23, 24, 25, 26, 27); // Assigning arduino pins to LCD display module
LiquidCrystal lcd(10, 9, 7, 6, 5, 4);
int greenLED = 11; //2   
int redLED = 12;   //3       
int gasPin1 = A0;
int pirPin1 = A1;  //36    
int tempPin1 = A2; //A8
int ldrPin1 = A3;
int speakerPin = 13; //10
int relayPin = A5;
int testPin = 8;
int zone = 0;
int alarmActive = 0;  

void setup(){
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.clear();
      
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(speakerPin, OUTPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(testPin, OUTPUT);
  
  pinMode(pirPin1, INPUT);     //Motion
  pinMode(gasPin1, INPUT);     //Gas
  pinMode(ldrPin1, INPUT);     //LDR
  
  digitalWrite(redLED, LOW);
  digitalWrite(greenLED, HIGH);
  digitalWrite(speakerPin, LOW);
  lcd.print("   Warrming up   ");
  //delay(20000);
  delay(100);
  lcd.clear();
  lcd.print("  Welcome AAST   ");
  delay(100);
  
 
  
}

void loop(){
  alarmActive = 1;
  readstatus();
  Serial.flush();
  checksensor();
  readtemp();
  //sendstatus();
  }
/////////////////////////  Functions  /////////////////////////////////

void readtemp()    // Read Tempreature
{
  lcd.clear();
  int chk = DHT.read11(tempPin1);
  value = (String) DHT.temperature + "C" + "," + (String) DHT.humidity + "%" + "," + (String) digitalRead(relayPin);
  Serial.println(value);
  lcd.setCursor(0,0);
  lcd.print("Temp : ");
  lcd.setCursor(10,0);
  lcd.print(DHT.temperature);
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(0,1);
  lcd.print("Humidity: ");
  lcd.print(DHT.humidity);
  lcd.print("%");
  delay(1500);
    
}

void alarmTriggered(){
  
  //alarmActive = 1;
  digitalWrite(speakerPin, HIGH);
  digitalWrite(greenLED, LOW);
  digitalWrite(redLED, HIGH);
  lcd.clear(); //asm
  lcd.print("SYSTEM TRIGGERED");
  //lcd.setCursor(0,3);
  //lcd.print("                    ");
   
   if (zone == 0) { 
    lcd.setCursor(0,1);
    lcd.print("Motion Detected");
    delay(500);
    lcd.clear();
    delay(500);
  }

  if (zone == 5) { 
    lcd.setCursor(0,1);
    lcd.print("Light Detected");
    delay(500);
    lcd.clear();
    delay(500);
  }
  
   else if (zone == 4){
   lcd.setCursor(0,1);
   lcd.print("Gas Detected");
   delay(500);
   }
   digitalWrite(speakerPin, LOW);
   digitalWrite(greenLED, HIGH);
   digitalWrite(redLED, LOW);
}

void checksensor(){
if (alarmActive == 1)
    {
    if (digitalRead(pirPin1) == HIGH)
    {
      zone = 0;
      alarmTriggered();
    }
    if (digitalRead(gasPin1) == HIGH)
     {
      zone = 4;
      alarmTriggered();
     }
     if (digitalRead(ldrPin1) == LOW)
     {
      zone = 5;
      alarmTriggered();
     }
   }
   else
   
   //Serial.println("readtemp"); 
   readtemp();
}
void readstatus()
{while (Serial.available())
  { delay(100);
    char c = Serial.read();
    text += c;
  }
  if (text.length() > 0)
  {
    //Serial.print(text);
    if (text == "1")
    {
      digitalWrite(relayPin, HIGH);
    }
    if (text == "0")
    {
      digitalWrite(relayPin, LOW);
    }
    if (text == "query")
    {
      digitalWrite(testPin, LOW);
    }
    text = "";
  }
}

void sendstatus(){
    //var = 0;
    //while ( var < 200)
    while(Serial.available())
  { value = (String) DHT.temperature + "C" + "," + (String) DHT.humidity + "%" + "," + (String) digitalRead(relayPin);
    Serial.println(value);
    delay(1500);
    //var++;
  }
}

void sendstatus1(){
  for (int i=0; i<10; i++)
  Serial.println(value);
}