Counting RINGs, Sim900_suli.cpp on GPRS shield V2.0....HELP needed

Projects Programming
1

hello all...

It was very hard for me to understand the SIM900_suli library, there are very few examples and I tried to figure it out reading the cpp file.
Many things unfortunatelly are still unclear.
Anyway, the code below calls a number and starts to count RINGs in the DO/WHILE loop, int ringCount increment is by 1.
When running the code it goes 1,3,5,7....and so on.!!!??? WHY?
I should be 1,2,3,4....
Also, the response from the GPRS shield, in string gprsBuffer is truncated. there are only the 2 last digits from the caller ID. gprsBuffer length is always 16. (???)

you can see it in the screenshot....

I cant figure out why this is happening....any help is appreciated?

#include <GPRS_Shield_Arduino.h>
#include <SoftwareSerial.h>
#include <Wire.h>
#include <Suli.h>

#define NUM "xxxx083314"
char gprsBuffer[32];
char *s = NULL;
      
GPRS gprsVP(7,8,19200);//RX,TX,PWR,BaudRate

void setup() 
{ 
  Serial.begin(19200);
  while (!Serial.available()) {Serial.println("Press key to start") ;}
  while(0 == gprsVP.init())
      {delay(500);
      Serial.print("Init error\r\n");
      }
  delay(500);  
  Serial.println("Initialized..OK!");
  
  countrings();
}

void loop()
  {
  sim900_read_buffer(gprsBuffer,32,DEFAULT_TIMEOUT);
              Serial.println(gprsBuffer);
    }

void countrings()
{      
       int ringCount = 0;
       int readCount = 0;
       int busyCount = 0;
       int nocarCount = 0;
       
       gprsVP.hangup();
       gprsVP.callUp(NUM);
       delay(200);
       sim900_clean_buffer(gprsBuffer,32);
             
       do  {
              sim900_read_buffer(gprsBuffer,32,DEFAULT_TIMEOUT);
              Serial.println(gprsBuffer);
              Serial.print("buffer length=");
              String t=String(gprsBuffer);
              Serial.println(t.length());
              
              if(NULL != strstr(gprsBuffer,"RING")) 
                {ringCount++; 
                 Serial.print("ring string found -->");  //(ringCount);
                 Serial.println(ringCount++);
                }
              if(NULL !=strstr(gprsBuffer, "BUSY"))
                {Serial.println("busy string found ");
                 busyCount++;
                 Serial.println(busyCount);
                 ringCount=20; //escape do loop
                }
              if(NULL !=strstr(gprsBuffer, "NO CARRIER"))
                {Serial.print("no carrier found ");
                 nocarCount++;
                 Serial.println(nocarCount);
                 ringCount=20; // escape do loop
                }
           }  while (ringCount < 20);
                   
       gprsVP.hangup();
       Serial.print("OUT of the LOOOOp ==>");
       Serial.println(ringCount);
      
       sim900_clean_buffer(gprsBuffer,32);
      
 

}

ringcount.png
ringcount.png976×757 48 KB

2 
                {ringCount++;
                 Serial.print("ring string found -->");  //(ringCount);
                 Serial.println(ringCount++);
                }

In these three lines, how many times do you increment ringCount? If you said one, you are wrong.

3

PaulS:

                {ringCount++;

Serial.print("ring string found -->");  //(ringCount);
                Serial.println(ringCount++);
                }



In these three lines, how many times do you increment ringCount? If you said one, you are wrong.

hehe...you are right.
Twice, accidentaly. My fault!

Thanx :slight_smile:

PS. are you familiar with SIM900 library?

.