Smart Home Technology for Door Lock System

Abstract

In this work, we propose a Door lock System using Bluetooth. It is a part of smart home technology for door
locking and unlocking operation. The ideal purpose of this work is, it greatly helps physically challenged people and old
age people to lock and unlock the door without moving from their place. To perform door operation, Bluetooth enabled
devices (such as mobile phones, laptops, watches) are searched first. Then the signals from mobile devices are transferred
to Bluetooth module which is fixed with a breadboard. This Bluetooth module is then connected to an arduino
microcontroller. C based program is embedded in arduino microcontroller to perform door lock operation. When user
switch on the Bluetooth in the mobile device, the signal is transferred from arduino microcontroller to DC motor which is
attached with the door? By using gear mechanism in clockwise and anticlockwise direction, the DC motor is operated to
perform Door operation. For safety purpose, the project is designed with an additional facility of automatic door locking
mechanism with the time span of 30 seconds after the unlock of door.