Design and Implementation of a Smart Door Locking System with Automatic Appliance Switching

The implementation of a smart door for residences is discussed in this paper, which allows them to operate household devices as they leave the house. In the present days, electricity tariff is quite high. The majority of people forget to turn off their appliances, which results in higher electricity bills. In order to save electricity, it is necessary to automatically control the devices. One such technique is adopted here using smart door locking system. As residents leave the house, the devices turn off automatically while nobody is inside. As they arrive, to unlock the door, a password-entering system is introduced at the entrance. Once the door is unlocked, based on person’s status appliances are either put to off or on. Arduino Uno is incorporated to control the door operation. The operation is performed in two ways: one is manually by using a keypad, and the other is digitally using a Bluetooth module. The system depends upon the pre-decided password concept with proper security. This developed system has strict access control with security features for controlling the door. Thus, the implementation is effective in terms of security, cost and safety.