SMS controlled Door Lock using Arduino and GSM module.

we propose a smart digital door lock system for home automation. A digital door lock system is equipment that uses the digital information such as a secret code.A door lock system proposed here consists of GSM module to interact with user remotely, a motor module for opening and closing of the door and some sensor modules for detecting the knocking situations of user.it also allows users to remotely reset the secret code in the lock.The LCD display and keypad help to user to give inputs and see outputs easily.