Design and Construction of a Safe Deposit Box with an Internal Environmental Condition Monitoring System

Abstract

This study examines the creation of a secure deposit box system that integrates environmental monitoring and security functionalities with Internet of Things (IoT) technology. The system is designed to improve the protection of stored items by maintaining suitable internal conditions while preventing unauthorized access. An ESP32 microcontroller is employed as the core processing unit to manage sensor inputs and control system responses. Internal temperature and humidity are monitored using a DHT22 sensor, allowing the system to observe environmental changes that may affect sensitive items. Human movement is detected using a PIR sensor, while a magnetic reed switch is used to identify door opening events. To support security functions, the system is equipped with a door lock solenoid that serves as an automatic locking mechanism and a buzzer that provides an audible alert when suspicious activity or forced access is detected. All sensor readings and system statuses are presented through a web-based dashboard, which enables users to monitor conditions and security events in real time via a local network connection. System evaluation was carried out to assess the reliability of sensor readings, the responsiveness of actuators, and overall system performance. The findings demonstrate that the system functions reliably, providing precise environmental measurements, dependable motion and door status detection, and prompt alarm activation. In conclusion, the established safe deposit box system provides a pragmatic and efficient option for safeguarding expensive assets necessitating regulated environmental conditions, with potential for enhancement through cloud-based monitoring and alerting functionalities.