Arduino Uno and SimCOM SIM 900 problem

Projects Networking, Protocols, and Devices
1

Hello!

For a long time trying connect Arduino uno and SimCOM SIM900 GPRS shield but Without success.
I try a lot of diferent CODE but gprs shield does not respond.

In this code in serial monitor write :

  //////////////////////////////////////////////
  //        Arduino GSM SHIELD SMS            //
 //              Tutorial by                 //
//           http://www.educ8s.tv           //
/////////////////////////////////////////////


#include "SIM900.h"

#include "sms.h"
SMSGSM sms;

int numdata;
boolean started=false;
char smsbuffer[160];
char n[20];

char sms_position;
char phone_number[20];
char sms_text[100];
int i;

void setup()
{
    Serial.begin(9600);
    
    if (gsm.begin(9600)) 
    {
        Serial.println("\nstatus=READY");
        started=true;
    } 
    else 
        Serial.println("\nstatus=IDLE");

    if(started) 
    {
        if (sms.SendSMS("+3864178xxxx", "Arduino SMS"))
        {
          Serial.println("\nSMS sent OK.");
        }
        else
        {
          Serial.println("\nError sending SMS.");
        }      
    }
};

void loop()
{
    if(started) 
    {
        sms_position=sms.IsSMSPresent(SMS_UNREAD);
        if (sms_position) 
        {
            Serial.print("SMS postion:");
            Serial.println(sms_position,DEC);
            sms.GetSMS(sms_position, phone_number, sms_text, 100);
            Serial.println(phone_number);
            Serial.println(sms_text);
        }      
        delay(2000);
    }
};

DB:NO RESP
Trying to force the baud-rate to 9600
1200
2400
.
.
.115200
ERROR: SIM900 doesnt ansfer

Here is link of my pictures of GPRS SHIELD for ARDUINO UNO

Pictures

2

Here is another code Serial Relay

   //////////////////////////////////////////////
  //        Arduino GSM SHIELD SMS            //
 //              Tutorial by                 //
//           http://www.educ8s.tv           //
/////////////////////////////////////////////


#include "SIM900.h"

#include "sms.h"
SMSGSM sms;

int numdata;
boolean started=false;
char smsbuffer[160];
char n[20];

char sms_position;
char phone_number[20];
char sms_text[100];
int i;

void setup()
{
    Serial.begin(9600);
    
    if (gsm.begin(9600)) 
    {
        Serial.println("\nstatus=READY");
        started=true;
    } 
    else 
        Serial.println("\nstatus=IDLE");

    if(started) 
    {
        if (sms.SendSMS("+3864178xxxx", "Arduino SMS"))
        {
          Serial.println("\nSMS sent OK.");
        }
        else
        {
          Serial.println("\nError sending SMS.");
        }      
    }
};

void loop()
{
    if(started) 
    {
        sms_position=sms.IsSMSPresent(SMS_UNREAD);
        if (sms_position) 
        {
            Serial.print("SMS postion:");
            Serial.println(sms_position,DEC);
            sms.GetSMS(sms_position, phone_number, sms_text, 100);
            Serial.println(phone_number);
            Serial.println(sms_text);
        }      
        delay(2000);
    }
};

when i typing AT and send in serial command, nothing happend....

Jumper on GPRS shield is set on D8(RX) and D7(TX) i thing this is serial.

Power led is ON
Status led is ON
Netlifght blink every 3 second.

If I call the phone number (sim in gprs) called normal, means that the number is available.

Please help me !

Thankyou

Regards