Bluetooth Assisted Misplaced Object Finder Using DFRobot Arduino Integrated with Android Application

The chapter delves into the ubiquitous problem of misplaced objects, offering a sophisticated solution through the integration of Bluetooth technology and DFRobot Arduino. The system, designed for proximity-based tracking, leverages Bluetooth Low Energy (BLE) for its low power consumption and health safety, making it ideal for indoor environments. The hardware setup includes a DFRobot BLE Arduino interfaced with LED and buzzer, while the software component is a user-friendly Android application that initiates the search process and displays the estimated distance of the object. The chapter provides a thorough review of related works, highlighting various technologies such as RSSI, RFID, GPS, WiFi, and BLE used in object tracking systems. The system's design is meticulously detailed, including 3D modeling and printing of the hardware packaging, ensuring a robust and compact solution. The results and discussions section presents a comprehensive analysis of the system's accuracy, reliability, and power efficiency. The mobile application's distance estimation is evaluated using the lognormal model, with a mean squared error of approximately 0.48%, indicating high accuracy. The scatter plots illustrate the strong correlation between the app-measured distances and the actual distances, as well as the time taken to receive signals. The battery efficiency is also analyzed, showing an inverse relationship between app usage and battery lifespan. Expert evaluations confirm the system's reliability and user-friendliness, with high ratings across various indicators. The chapter concludes with a discussion on future improvements, suggesting the integration of Wi-Fi and GPS for enhanced tracking capabilities and improved data privacy and security measures.