Arduino + SIM900 + read long sms

Projects Programming
1

Hello. There is a code:

#include "SIM900.h"
 
#include <SoftwareSerial.h>
 
#include "sms.h"
 
SMSGSM sms;
 
char number[]="3921234567";
 
char message[500];
 
char pos;
 
char *p;
 
void setup()
 
{
 
 Serial.begin(9600);
 
 if (gsm.begin(2400))
 
   Serial.println("\nstatus=READY");
 
 else Serial.println("\nstatus=IDLE");
 
};
 
void loop()
 
{
 
 pos=sms.IsSMSPresent(SMS_UNREAD);
 
 Serial.println((int)pos);
 
 if((int)pos>0&&(int)pos<=20){
 
   Serial.print("NUOVO MESSAGGIO, POS=");
 
   Serial.println((int)pos);
 
   //message[0]='\0';
 
   sms.GetSMS((int)pos,number,message,1000);
 
 Serial.print("number: ");
 Serial.print(number);
 
 Serial.print("message: ");
 Serial.print(message);


char message [] = "";

   
   
 for (int i=0; i<=(int)pos; i++)
   sms.DeleteSMS(i);
 
 }
 
 delay(5000);
 
};

this code must println the sms of 500 bytes, but why is output circumcision part sms (132 bytes) and without

Serial.print("number: ");
Serial.print("message: ");

who faced a similar problem please tell me how to properly implement reading long sms?...
Thank you in advance for your help!

2

You could always try search for 'User Data Header'.

Wikipedia has quite a lot of information about SMS message structure.

3 
char pos;

to index this array:

char message[500];

yeah, right!

4

Hi chiffacff

Have you tried the support forum at the website for the gsm library?

http://www.gsmlib.org/support.html

I 'm not sure if the type of variable "pos" is necessarily a problem, because I think it is used to index into a short table of SMS messages on the SIM card on the mobile phone, rather than indexing into the char array that gets the message.

Regards

Ray