Skype Emergency Call

#define CUSTOM_SETTINGS
#define INCLUDE_SKYPE_SHIELD

/* Include 1Sheeld library. */ 
#include <OneSheeld.h>

/* Define a boolean flag. */
boolean didWeCall = false;
/* A name for the button on pin 12. */
int buttonPin = 12;

void setup() 
{
  /* Start communication. */
  OneSheeld.begin();
  /* Set the button pin as input. */
  pinMode(buttonPin,INPUT);
}

void loop() 
{
  if (digitalRead(buttonPin) == HIGH)
  {
    if(!didWeCall)
    {
      /* Call one of your Skype's contacts. */
      Skype.call("echo123");  
      /* Set the flag. */
      didWeCall = true;
    }
  }
  else
  {
    /* Reset the flag. */
    didWeCall = false;
  }
}