 *   1. Setup
 *   2. Handle Serial (for start-up configuration)
 *   3. Loop
-*        Enter Sleep (low-power mode)
-*        < Will wake up on Interrupt and continue: >
 *        If serial is enabled
 *          Handle serial input
 *        If four seconds are up

  *   call function Sleep();
  \*****************************************/
  if(/*sleepEnable*/)
    Sleep();
}

*          Power-on the SD card
*          Write data
*          Power-off the SD card
*        If sleep is enabled (disabled when serial is enabled)
*          Enter Sleep (low-power mode)
*          < Will wake up on Interrupt and continue: >
*      Repeat Loop
*      
* Interrupts:
