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 #include <SoftwareSerial.h>
 #include <SPI.h>        //SPI.h must be included as DMD is written by SPI (the IDE complains otherwise)
#include <DMD.h>        //
#include <TimerOne.h>   //
#include "Arial_black_16.h"

//Fire up the DMD library as dmd
#define DISPLAYS_ACROSS 1
//when i tried using#define DISPLAYS_ACROSS 2 i got trouble
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);


SoftwareSerial mySerial(5, 10);
char mes[500];
char ch;
int temp=0;
int j,i=0,t=0,k=0;
void ScanDMD()
{ 
  dmd.scanDisplayBySPI();
}

void setup()
{
  mySerial.begin(9600);   // Setting the baud rate of GSM Module  
  Serial.begin(9600);    // Setting the baud rate of Serial Monitor (Arduino)
  //initialize TimerOne's interrupt/CPU usage used to scan and refresh the display
   Timer1.initialize( 5000 );           //period in microseconds to call ScanDMD. Anything longer than 5000 (5ms) and you can see flicker.
   Timer1.attachInterrupt( ScanDMD );   //attach the Timer1 interrupt to ScanDMD which goes to dmd.scanDisplayBySPI()

   //clear/init the DMD pixels held in RAM
   dmd.clearScreen( true );   //true is normal (all pixels off), false is negative (all pixels on)

  //delay(1000);
}


void loop()
{ byte b;

  dmd.selectFont(Arial_Black_16);
  
  if (Serial.available()>0)
   switch(Serial.read())
  {
    case 's':
      SendMessage();
      break;
    case 'r':
      RecieveMessage();
      break;
  }

 while(mySerial.available()>0)
 {temp=0;
 i=0;
  
  while(mySerial.available()>0)
   {
   
    ch=mySerial.read();
    if(ch=='"')
     temp++;
    if(temp>=7)
    { 
      mes[i]=ch;
      i=i+1;
    }
    if(temp==6)
     temp++;
    Serial.write(ch);
   }
  
 mes[i]='\0';
  i++;
 
 
  
 }
 
 
while(i>j)
   {Serial.write(mes[j]);
   
   j++;
   }
   j=0;
   
   if(temp>6)
 {    dmd.drawMarquee(mes,strlen(mes),(32*DISPLAYS_ACROSS)-1,0);
   long start=millis();
   long timer=start;
   boolean ret=false;
   while(!ret){
     if ((timer+100
     ) < millis()) {
       ret=dmd.stepMarquee(-1,0);
       timer=millis();
     }
   }
 
 }
}

 void RecieveMessage()
{
 
   mySerial.println("AT+CNMI=2,2,0,0,0");
  delay(1000);
 } 




 void SendMessage()
{
  mySerial.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);  // Delay of 1000 milli seconds or 1 second
  mySerial.println("AT+CMGS=\"+91xxxxxxxxxx\"\r"); // Replace x with mobile number
  delay(1000);
  mySerial.println("I am SMS from GSM Module");// The SMS text you want to send
  delay(100);
   mySerial.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
}