arduino strucks on Serial.println(); SRAM or other fault

Projects Programming
1

Hello,

I am making GSM control unit. Arduino strucks on any command in function(check photo):
void epwrite(){
if(kelintas==1){
for(i=0;i<9;i++){
EEPROM.write(i, atpaz.substring(i, i+1).toInt());
}}
if(kelintas==2){
for(i=10;i<19;i++){
EEPROM.write(i, atpaz1.substring(i-10, i-9).toInt());
}}
if(kelintas==3){
for(i=20;i<29;i++){
EEPROM.write(i, atpaz2.substring(i-20, i-19).toInt());
}}
delay(700);
Serial.println("anything");
}

I tried to add SRAM checking function Arduino Playground - AvailableMemory and it shows about 900bytes of memory left. When I put more commands it strucks earlier. That could be fault about this error? When I call this command from other place it works good. Can I change stack and heap on arduino, as on IAR? Whole code is about 490lines, pretty long.. Maybe some other ideas?

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2

When code was not so long, it worked good. Added more functions - it should write something one time, but it has been writting twice; much more functions - it strucks.

3

Post code, not screenshots.

4

AWOL:
Post code, not screenshots.

Use code tags.

5

When code was not so long, it worked good. Added more functions - it should write something one time, but it has been writting twice; much more functions - it strucks.

That's generally what happens when you run out of memory.

6

It is not full code, only everything around faulty function:

void loop() {
  modemas();     //I tried to put nrkeitimas() here, it worked fine
  sildo();
  wdt_reset();
}
//////////////////////---skaitom iš GSM modemo***////////////////////////
void modemas(){ 
  if (gsmSerial.available () > 0)             //jei modemas siun?ia duomenis, juos nuskaitom
  {
    while (gsmSerial.available () > 0) {
      char inByte = gsmSerial.read ();

      switch (inByte)
      {

      case '\n':   // jei teksto pabaiga
        eil+=1;
        input_line [input_pos] = 0;  //nulinam eilut?
        data=input_line;
        process_data ();//(input_line);
        delay(3);
        input_pos = 0;               //nulinam pozicij?
        break;

      case '\r':                //atmetam carriage return
        break;

      default:
        if (input_pos < (MAX_INPUT - 1))
          input_line [input_pos++] = inByte;       //gauti duomenys surašomi ? eilut?
        break;

      }
    }
  }
}
////////////////
void process_data (){
if(strstr(data, "REC UNREAD")){
    numeris+='8';
    for(i=25;i<33;i++){
      numeris+= data[i];
    }
  }  
  if(strstr(data, "+CMTI:")){    // +CMTI reiskia, kad gavom SMS?
    char* copy = data + 12;      // ži?rim kelintas SMSas
    SMS_location_number = (byte) atoi(copy);  // pasiver?iam reikšm?(eilut?) ? skai?i?
    gsmSerial.print("AT+CMGR=");
    gsmSerial.println(SMS_location_number);  // Skaitom SMS? 
    sms=1;
    numeris=NULL;
    eil=0;
  }
  else if(strstr(data, kodas) && strstr(data, "naujas nr ")){
    char* cop = data + 17;
    kelintas = (byte) atoi(cop);
    for (i=19; i<28;i++)
      naujasnr += data[i];
    nrkeitimas();                             //          THIS IS FAULTY FUNCTION
  }
///////////////
//////////////////Here are many "else if's" for other commands
///////////////
}
void nrkeitimas(){                              //atpazistamo numerio keitimo funkcija
  Serial.println("freeMemory()=");
  Serial.println(freeMemory());
  Serial.println("Y"); 
  if(kelintas==1){
  atpaz=naujasnr;
  }
  else if(kelintas==2){
  atpaz1=naujasnr;
  }
  else if(kelintas==3){
  atpaz2=naujasnr;
  }
  else neteisinga();
  epwrite();                          /////////  It strucks even here(before doing epwrite()) if add more code
  Serial.println(naujasnr);
  gsmSerial.print(F("AT+CMGS="));
  gsmSerial.print(naujasnr);
  gsmSerial.println(F("\r"));
  delay(700);
  gsmSerial.print(F("Vartotojo ")); 
  gsmSerial.print(kelintas);
  gsmSerial.print(F(" numeris sekmingai pakeistas"));
  gsmSerial.print((char)26);
  gsmSerial.print(F("\r"));
  wait(1);
  
  naujasnr=NULL;
}

void epwrite(){
if(kelintas==1){
  for(i=0;i<9;i++){
    EEPROM.write(i, atpaz.substring(i, i+1).toInt());
    Serial.println(i);
  }}
if(kelintas==2){
for(i=10;i<19;i++){
  delay(3);
  EEPROM.write(i, atpaz1.substring(i-10, i-9).toInt());
}}
if(kelintas==3){
for(i=20;i<29;i++){
  EEPROM.write(i, atpaz2.substring(i-20, i-19).toInt());
}}                                                                                     ///////// HERE it strucks
}
7

RobvdVeer:

AWOL:
Post code, not screenshots.

Use code tags.

8

Even interrupt doesn't work, when this happens, but watchdog keeps counting.