 const int MESSAGE_SIZE = 101;
 
 // Set the name of the file to be read.
-#define FILENAME "backup.txt"
+#define FILENAME "testfile.txt"
 
 // Instantiate SDCard object. Need to call begin before using.
 UASensors_SDCard sd(CS_PIN);
 
 
 // Menu options recognized from Serial input
+const char SHOW_MENU = 'm';
 const char READ_FILE = 'r';
 const char WRITE_FILE = 'w';
 

  {
    switch (Serial.read())
    {
      case READ_FILE:
        doReadFile();
        break;

  }
}

void doShowMenu()
{
  Serial.println("SD Card Tester commands");
  Serial.println("-----------------------");
  Serial.println("m: Show menu");
  Serial.println("r: Reads contents of file");
  Serial.println("w: Write contents to file");
  Serial.println();
}

// Reads contents from specified file and returns
// the contents as String that will be printed to
