The study aimed to design a prototype that would provide an alternative way of locking and unlocking door locks with the use of Bluetooth technology that is also capable of sending SMS message upon intruder detection through GSM module. It is also integrated with microcontrollers for it to be able to provide remote access via Bluetooth technology and for GSM module manipulation.
The prototype has different components – a Bluetooth chipset, GSM module, toggle switch for rechargeable/non-rechargeable battery, LED indicator, relay, microcontroller, sound alarm, motor, and door lock. The Bluetooth chipset serves as the transceiver, and receiver of the Bluetooth signal between the mobile phone and the device that is responsible for the automation part of the device. The microcontroller processes the resulting inputs and commands gathered from the Bluetooth chipset and trigger the lock to be locked or unlock. The microcontroller also controls the GSM module on sending SMS message upon intruder detection. The toggle switch sets the operation of the battery for rechargeable and non-rechargeable. The LED indicator indicates the power status of the system. The relay switches the door lock to lock and unlocks status by means of digital signal.
The result of the study showed that the Bluetooth activated door lock with theft detectors via global system for mobile communication is possible as an alternative for the existing door lock locking and unlocking operation and is also embedded with a SMS message alarm. This device resolves problems concerning door lock management.