Wifi Sheild Arduino plus keypad

Projects Programming
9

This is what I did, changed the keypad pin from 4 to 15.

I added the following code in the setup

 while(!mySerial){ ; }
  delay(500);
  ///////////////////////////////SD_Memory
  
   Serial.print("Initializing SD card...");
   if (!SD.begin(4)) { Serial.println("initialization failed!"); return; }
      Serial.println("initialization done.");

This is a link to the barcode scanner that I used

http://playground.arduino.cc/ComponentLib/BarcodeScanner

and I added this code before the setup

#include <SPI.h>
#include <SD.h>

File myFile;

But the SD card did not initialised