/*
Zobacz opis alarmu na http://majsterkowo.pl/zabezpieczamy-dom-czyli-jak-zrobic-alarm-z-odswiezacza-powietrza/
Autor programu: Łukasz Więcek
small changes by Nicu FLORICA (aka niq_ro) from http://www.arduinotehniq.com/
*/

#define senzor 14      // D14 is A0, pin for PIR sensor data
#define contact 2      // D2, pin for on/off alarm
#define syrena 13      // D13, pin for syren, buzzer
#define rosu 11        // D13, pin for red led
#define verde 9        // D9, pin for green led
#define albastru 10    // D10, pin for blue led

int senzorData;
unsigned long ceas, timpmemorat;

int intarziereactivare = 5;    // delay for standby to armed
int intarzieredezactivare = 5; // delay for triggered to syren activated
int timpurlat = 5;             // time to syren is on

// variable for states "0"
char caz = 0;

/*
States for :
  0 - off
  1 - stand-by
  2 - waitting
  3 - countdown
  4 - alarm
*/

void setup()
  {
  Serial.begin(9600);  
  Serial.println("Alarm system by Łukasz Więcek from http://majsterkowo.pl");
  Serial.println("Small changed by niq_ro from http://arduinotehniq.com");
  pinMode(syrena, OUTPUT);
  pinMode(senzor, INPUT);
  pinMode(contact, INPUT);
  pinMode(rosu, OUTPUT);
  pinMode(albastru, OUTPUT);
  pinMode(verde, OUTPUT);

  pinMode(contact, INPUT_PULLUP);
  }

void loop()
  {
  ceas = millis();    // read the internal clock

  if(digitalRead(contact) == HIGH)      
    {
    // alarm is off
    analogWrite(verde, 0);
    analogWrite(rosu, 0);
    analogWrite(albastru, 240);

    digitalWrite(syrena, LOW);
    caz = 0;
    Serial.println("System is OFF !");
    }

  else
    {
    // alarm is on
    if(caz == 0) 
     {
     caz = 1;
     timpmemorat = ceas;
     analogWrite(albastru, 0);
     }

    if(caz == 1)              // system waitting
      {
      analogWrite(verde, 240);
      delay(500);
      analogWrite(verde, 0);
      delay(500);

      if(ceas >= timpmemorat + intarziereactivare * 1000) {caz = 2;}
      Serial.println("System is waitting !");
      }
      
    if(caz == 2)              // system is armed
      {
      analogWrite(verde, 240); 

   //   senzorData = analogRead(senzor);
      senzorData = digitalRead(senzor);  
      Serial.print("senzordData = ");
      Serial.println(senzorData);
   
  //    if(senzorData > 600) {caz = 3; timpmemorat = ceas;}
     if(senzorData == HIGH)
       {
       caz = 3;
       timpmemorat = ceas;
       analogWrite(verde, 0);
       }
      Serial.println("System is armed !");
      }

    if(caz == 3)              // system is triggered and countdown
      {             
      analogWrite(rosu, 240);
      delay(100);
      analogWrite(rosu, 0);
      delay(400);

      if(ceas >= timpmemorat + intarzieredezactivare * 1000) {caz = 4; timpmemorat = ceas;}
      Serial.println("System is triggered and countdown !");
      }

    if(caz == 4)              // syren (buzzer) is active
      {
      digitalWrite(syrena, HIGH);
      analogWrite(rosu, 240);
      Serial.println("Syren is active !");
      
      if(ceas >= timpmemorat + timpurlat * 1000) {caz = 2; digitalWrite(syrena, LOW); analogWrite(rosu, 0);}
      }
    }
  }