Abstract: Smart door locking system is not a new concept. However with the advancement in technology, these systems also have become more advanced. The android based smart door lock system discussed in this paper is basically designed for multi mode operations like multi user and multi level user operation. Such system is very much required in Bank and Business organization. The system also gives functionalities for general user, where single user is authorized to operate the lock. The cost effective implementation with advanced functionality and easy to use interface makes the system very useful.

Keywords: Arduino Uno, Android, Smart Phone.