Replace/Clone/Copy iButtonFunctions

Application:
  The method is suitalbe to DS1977,DS1982,DS1985,DS1991,DS1994,DS1995,DS2502 and DS2505 etc. DS1977 and DS1991 must be decipher the keys or passwords before copying them.

Principle

  Every iButton has a 64bit UID, ie, ROM. Because ROM could not be modified, the cloned iButton could not work well even though you copy all of the data from a usable iButton to another iButton, when the ROM is related to the data of the iButton.
  To resolve the problem, we adopt a MCU to simulate the ROM. When your equipment reads ROM, the MCU will answer the ROM, when your equipment reads or writes data of an iButton, a real iButton which has been copied the data from a usable iButton will respond correctly.