Arduino Uno + Gsm Shield issue: unresponsive

hi,

i'm using arduino uno + gsm shield in project  that aims @ controlling instrument remotely. runs continuously without problems first week approximately, after uno seems unresponsive , not process sms received , looks unresponsive. way in order normal functioning pushing reset button on uno board.

i don't know whether can understand issue, when call mobile number, line ok.

thank help

the following code:

code: [select]


# www.biemmeitalia.net

#include <gsm.h>
#include <memoryfree.h>    //library calculate free memory
#define watchdog 1         //commentare questa riga per disabilitare il watchdog

#ifdef watchdog
 #include <avr/wdt.h>        //watchdog library
#endif

//#define debug 1          

#define soglia_memoria_disponibile 600

#define sendsms 1

#define pin_sondatemp 1
#define pincaldaia_on 8
#define pin_temp_minima 9
#define ledantigelo 4
#define pinalarm 10

//impostazione da pulsanti su box
#define pin_on 5
#define pin_off 6

//numero di campionamenti analogica
#define num_letture_an 30

#define set_temp 2.0
#define delta 5.0

// initialize library instances
gsm gsmaccess;
gsm_sms sms;

char sendernumber[20];  

char remotenumm[20]="33912345678";
char remotenumcliente[20]="34712345677";

byte flagabilitalogica = 1;
byte flagsmsallarme    = 0;
byte flagsmsricevutoon = 0;
byte flagsmsricevutooff= 0;
byte flagtempsottozero = 0;
byte flagtempnegativa  = 0;

byte flagsmsdestinatariom = 0;

//stato letture pin digitali
byte statopinon     = 0;
byte statopinoff    = 0;
byte statopinalarm = 0;

//logica temperatura
int count = 0;
unsigned long cum = 0;
int reading;
double temp_avg = 150.0;
double temperaturec = 15.0;


void setup()
{
 #ifdef debug
   serial.begin(9600);
 #endif
 
 #ifdef debug
  serial.println("init pins");
 #endif

 pinmode(pincaldaia_on, output);
 pinmode(pin_temp_minima, output);
 pinmode(pinalarm, input_pullup);
 pinmode(ledantigelo,output);
 pinmode(pin_on, input_pullup);
 pinmode(pin_off,input_pullup);
 digitalwrite(pincaldaia_on,low);
 digitalwrite(pin_temp_minima,low);

 // connection state
 boolean notconnected = true;

 // start gsm connection
 while(notconnected)
 
 {
   if(gsmaccess.begin()==gsm_ready)
     notconnected = false;
   else
   {
     #ifdef debug
       serial.println("not connected");
     #endif
     delay(1000);
     logicatemperatura();
     
   }
 }
 #ifdef debug
  serial.println("gsm initialized");
  serial.println("waiting messages");
 #endif
 delay(1000);
 
 #ifndef watchdog
  sendalarmsms("enel riattivato.");
 #endif
 
 #ifdef watchdog
  wdt_enable(wdto_8s);
 #endif
}


void loop()
{
 string smstextreceived;
 char c;

 // if there smss available()  
 if (sms.available()){

   serial.println("message received from:");

   sms.remotenumber(sendernumber, 20);
   #ifdef debug
    serial.println(sendernumber);
   #endif

   smstextreceived="";

   while(c=sms.read()){
     smstextreceived+=c;
     #ifdef debug
      serial.print(c);
     #endif
   }
   #ifdef debug
    serial.println("\nend of message");
   #endif

   // delete message modem memory
   sms.flush();
   #ifdef debug
    serial.println("message deleted");
   #endif

   //se ricevo un sms con il testo "on"
   if (smstextreceived.equalsignorecase("on")){
     flagsmsricevutoon = 1;
   }

   if (smstextreceived.equalsignorecase("off")){
     flagsmsricevutooff = 1;
   }
   if (smstextreceived.equalsignorecase("mario")){
     flagsmsdestinatariom = 1;
     sendalarmsms_m("messaggi diretti m.");
   }
   if (smstextreceived.equalsignorecase("cliente")){
     flagsmsdestinatariom = 0;
     sendalarmsms_m("messaggi diretti al c.");
   }
   
   if (smstextreceived.equalsignorecase("temp")){
     char messaggio[100];
     
     string mess;
     string str_intero;
     string str_virgola;
     int intero;
     int virgola;
     
     serial.println(temperaturec);
     
     flagtempnegativa = 0;
     if (temperaturec < 0){
       flagtempnegativa = 1;
       temperaturec = abs(temperaturec);
     }    
     intero = (int)temperaturec;
     virgola = (int)((temperaturec - (double)intero)*100.0);
     
     #ifdef debug
      serial.println(intero);
      serial.println(virgola);
     #endif
     
     str_intero = string(intero);
     str_virgola = string(virgola);
     
     if (flagtempnegativa == 0){
       mess = string("temperatura corrente: " + str_intero + "," + str_virgola);
     }else{
       mess = string("temperatura corrente: -" + str_intero + "," + str_virgola);
     }
     mess.tochararray(messaggio, mess.length());
     sendalarmsms(messaggio);
     delay(100);
   }
   
 }
 
 statopinon  = digitalread(pin_on);
 statopinoff = digitalread(pin_off);
   
 if ((flagsmsricevutoon) || (statopinon == low)){
     #ifdef debug
      serial.println("on");
     #endif
     digitalwrite(pincaldaia_on, high);
     digitalwrite(pin_temp_minima, low);
     digitalwrite(ledantigelo,low);
     
     flagabilitalogica = 0;
     sendalarmsms("caldaia attiva da termostato ambiente.");
 }else{
   if ((flagsmsricevutooff) || (statopinoff == low)){
     #ifdef debug
      serial.println("off");
     #endif
     digitalwrite(pincaldaia_on, low);
     digitalwrite(ledantigelo,high);
     
     cum = 0;      //azzera la variabile per il calcolo delle temp medie
     flagabilitalogica = 1;
     count = 0;
     sendalarmsms("abilitazione temperatura minima.");
   }
 }
 
 logicatemperatura();

 delay(10);
 
 statopinalarm = digitalread(pinalarm);
 
 if (statopinalarm == low){  
   if (!flagsmsallarme){
     sendalarmsms("blocco.");
     flagsmsallarme=!flagsmsallarme;
   }
 }else{
   flagsmsallarme=0;
 }
 flagsmsricevutoon  = 0;
 flagsmsricevutooff = 0;

 #ifdef watchdog
   int mem = freememory();
   if (mem > soglia_memoria_disponibile){
     wdt_reset();
   }
 #endif
}



void logicatemperatura(){

 if (count < num_letture_an){
   
   count++;
   reading = analogread(pin_sondatemp);
   cum += reading;
   
 }
 else{
   
   temp_avg = (double)cum/(double)num_letture_an;
   
   double voltage = temp_avg * 5.0;
   voltage /= 1024.0;

   temperaturec = ((voltage - 0.5) * 100)-5.0 ;

   #ifdef debug
    serial.print(temperaturec);
    serial.println(" degrees c");
   #endif

   if (flagabilitalogica){
     if (temperaturec < set_temp){
       #ifdef debug
        serial.println("temp bassa");
       #endif
       digitalwrite(pin_temp_minima, high);
     }else if (temperaturec > set_temp + delta){
       #ifdef debug
        serial.println("temp alta");
       #endif
       digitalwrite(pin_temp_minima, low);
     }
   }
   count = 0;
   cum   = 0;  
 }
}

void sendalarmsms(char * txtmsg){
#ifdef sendsms
 
 #ifdef debug
  serial.println("spedisco:");
  serial.println();
  serial.println("il seguente messaggio:");
  serial.println(txtmsg);
 #endif

 if (flagsmsdestinatariom){
   sms.beginsms(remotenumm);
 }else{
   sms.beginsms(remotenumcliente);
 }
 
 sms.print(txtmsg);
 sms.endsms();
 #ifdef debug
  serial.println("\nspedito!\n");
 #endif
#endif
delay(10);
}

void sendalarmsms_m(char * txtmsg){
#ifdef sendsms
 #ifdef debug
  serial.println("spedisco:");
  serial.println();
  serial.println("il seguente messaggio:");
  serial.println(txtmsg);
 #endif

 sms.beginsms(remotenumm);
 sms.print(txtmsg);
 sms.endsms();
 #ifdef debug
  serial.println("\nspedito!\n");
 #endif
#endif
delay(10);
}


any ideas?

thanks
elle

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