GSM Shield - problem with sending sms

Using Arduino Project Guidance
1

Hello everybody,
I am trying to send an sms with my Arduino UNO and the GSM Shield with the following code:

// Include the GSM library
#include <GSM.h>

#define PINNUMBER "1234"

// initialize the library instance
GSM gsmAccess;
GSM_SMS sms;

boolean bo = true;

void setup() {
  // initialize serial communications and wait for port to open:
  Serial.begin(9600);

  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.println("SMS Messages Sender");

  // connection state
  boolean notConnected = true;

  // Start GSM shield
  // If your SIM has PIN, pass it as a parameter of begin() in quotes
  while (notConnected) {
    if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
      notConnected = false;
    } else {
      Serial.println("Not connected");
      delay(1000);
    }
  }

  Serial.println("GSM initialized");

}

void loop() {



if(bo == true)
{
   Serial.println("in if");
  char txtMsg[] = "test";
  char remoteNum[] = "0123456789";
  
    // send the message
    sms.beginSMS(remoteNum);
     Serial.println("beginSMS");
    sms.print(txtMsg);
     Serial.println("print SMS");
    sms.endSMS();
    Serial.println("\nCOMPLETE!\n");
    Serial.println(" ende if");
    bo = false;
}
}

Running the program, I do not receive any sms. The last output of the serial monitor is "print SMS". The example sketch "SendSMS" ran without problems.
Where could be the mistake?

ludwigm

2

Hello,
I also tried this code, but it did not work, also.

  // send the message
    sms.beginSMS("0123456789");
    sms.print("Hello World");
    sms.endSMS();
    Serial.println("\nCOMPLETE!\);

Does anybody have an idea?