Development of smart key locker security system of Technological University of the Philippines Quezon/ Jepthe C. Gulifardo, John Mel G. Jesoro, Mary Grace R. Nuñez, John Kenneth M. Paulite, and Diego P. Zamudio .--

Bachelor's thesis

College of Industrial Technology .-- Bachelor of Engineering Technology major in Computer Engineering Technology: Technological University of the Philippines, 2025.

Includes bibliographic references and index.

This project is an innovative solution developed to enhance TUP's key management and
security: The Smart Key Locker Security System. The project will use a holistic system
that includes hardware and software components to deal with issues such as misplacement
of keys, unauthorized access, and ineffective tracking. The system provides an interface
for users' authentication by utilizing various technologies, such as the NodeMCU
ESP8266, solenoid lock, relay module, buck converter, 12-volt AC adapter, and a mobile
application. Security is achieved by implementing various features like sign-up and login
procedures and real-time monitoring of key access. Audit trails for administrators and data
logging functions further enhance the system by documenting users' activities. The
evaluation result shows that the project Key Locker Security System is reliable, with an
overall result of 4.74, which is highly acceptable. The project has been used continuously
for (24) hours without encountering any adverse results. The said feature provides ease in
identifying suspicious activities,such as illegal attempts to enter the locker and problems
with the system. Accessibility in cases of an electronic system failure is further ensured
through manual override devices such as key cylinders. The Smart Key Locker Security
System reduces risks. It increases responsibility by using a combination of digital and
physical security mechanisms to ensure that access to the keys is granted only to an
authorized person.

Keywords: Smart Key Locker, Key misplacement, Audit trail, NodeMCU ESP8266