/*

-Cody Singer-
-9/2012-

---(NWRA ALARM AUTODIALER 2012 V1.3)---

--When the alarm is triggered it closes a relay that connects LOW (-) to pin 4.
- this calls for the function DialVoiceCall(); to dial out to a phone number.

--Other feature is when an authorized number dials the device and lets it ring (3) set by "comring" times it will trigger the function KillFog() triggering a relay to OPEN which
-will disable the fog system of the alarm system. This funtion also triggers the function SendTextMessageFogDisarm() that sends a confirmation SMS to cody.

--Test switch is to test the system witout disturbing dan. When the switch is activated it triggers  TestDevice() function that sets
--the "ledPin" to HIGH and LOW (blink) then sends a text message to cody.
*/

#include <SoftwareSerial.h>
#include <String.h>

//software serial port for the GSM sheild to communicate with the Arduino
SoftwareSerial mySerial(7, 8);

char dan[]="AT + CMGS = \"+15092706606\"";
char cody[]="AT + CMGS = \"+15098501985\"";

//Trigger pin from the relay of the alarm
int triggerPin = 4;
//Pin that activates the relay opening the fog circuit
int fogkillPin = 10;
//Testpin is a switch that when activated sends a SMS to cody to ensure the device is communicating
int testPin = 11;
//Pin for the LED for visual reference of activation of the fogKill function, also activates with the TestDevice() function
int ledPin = 13;


char inchar;


// used to count the number of 'rings' received by the GSM module
int numring=0;
// this is the number of rings to wait for until calling the function doSomething();
int comring=3;

//Tracking variable to tell if the pin is (+) or (-)
int val;
int test;
//store mySerial.read info
char c = 0;
//store sms strings for if statements
String line = "";

void setup() {

//The GPRS baud rate
mySerial.begin(19200);
//The GPRS baud rate
Serial.begin(19200);
delay(500);


//Set the trigger pin as input
pinMode(triggerPin, INPUT);
//Set the fogkillPin as output
pinMode(fogkillPin, OUTPUT);
//set the testPin as input
pinMode(testPin, INPUT);
//set ledPin as output
pinMode(ledPin, OUTPUT);


//Internal pull up resistor to keep TriggerPin and testPin (+) until it receives a (-) signal from the alarm
digitalWrite(triggerPin, HIGH);
digitalWrite(testPin, HIGH);

Serial.print("Welcome to DIY alarm trigger by Cody Singer");
}

void loop() {

  //Set Val variable (TriggerPin)
  val = digitalRead(triggerPin);
  delay(100);
   if (val == LOW) {
     Serial.print("Alarm triggered");
     DialVoiceCall();
     delay(100);
   }

     //Set test to variable (testPin)
  test = digitalRead(testPin);
  delay(100);
   if (test == LOW) {
     Serial.print("TEST");
     TestDevice();
   }

    else {

    if (mySerial.available() > 0) { //read incoming data from GSM module
    c = mySerial.read();
    while ((c != '\n') && (c != '\r')) { //look for new lines from SIM900
                  line = line + c; //write incoming sms data to "line"
                  c = mySerial.read();
                }

if ((line == "RING"))  {
                  line = ""; //clear "line"
                  delay(10);
                  numring++;
                  if (numring==comring)
                  {
                  numring=0; // reset ring counter
                  Serial.print("RING received 3 times");
                  mySerial.println("ATH");
                  KillFog();
               }
             }
           }
         }
       }

//Send SMS function
void SendTextMessage(who, what)
{
  //Send the SMS in text mode
  mySerial.print("AT+CMGF=1\r");
  delay(100);
  mySerial.println(who);
  delay(100);
  mySerial.println(what);
  delay(100);
  //The ASCII code of the ctrl+z is 26
  mySerial.println((char)26);
  delay(100);
  mySerial.println();
}



//DialVoiceCall
void DialVoiceCall()
{
  //Dial the number
  mySerial.println(cody);
  delay(100);
  mySerial.println();
  delay(20000);

}

void TestDevice()
{
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);

}

void KillFog()
{
digitalWrite(fogkillPin, HIGH);
delay(500);
digitalWrite(ledPin, HIGH);
//SendTextMessage(cody,"FOG DISARMED!!!");
}

void LedBlink()
{
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);
}