1CH.Rohith, 2D.Yaswanth Kumar, 3CH.Naga Venkat Sai, 4G.Arun Kumar, 5B.Mohan Rao 02 07 The increasing rate of theft incidents in modern society has created a strong demand for intelligent and automated security systems Traditional locking mechanisms such as mechanical locks and basic alarms are no longer sufficient to provide reliable protection for valuable assets These systems often fail to detect unauthorized access in real time or notify the user immediately To overcome these limitations advanced embedded and IoTbased solutions are being developed to enhance security and provide smart monitoring capabilitiesThis project presents an AntiTheft Security System designed using NodeMCU along with RFID IR sensor vibration sensor GPS module and a buzzer The main objective of the system is to detect unauthorized access and trigger instant alerts The RFID module is used for authentication ensuring that only authorized users can access the system If an invalid RFID tag is detected the system immediately considers it as a threat and activates the security response mechanism In addition to RFID authentication the system also uses IR sensors and vibration sensors to detect physical disturbances or motion near the protected object These sensors continuously monitor the environment and send signals to the NodeMCU microcontroller when abnormal activity is detected The microcontroller processes the data and determines whether a security breach has occurred If a threat is confirmed the system activates a buzzer alarm to alert nearby peopleFurthermore the GPS module plays a crucial role in tracking the exact location of the protected object In case of theft the system sends realtime location data to the user through IoT communication using WiFi This allows the user to take immediate action and recover the stolen item quickly The integration of multiple sensors with IoT technology ensures high accuracy reliability and efficiency in security monitoring In conclusion the proposed AntiTheft Security System provides a smart costeffective and efficient solution for modern security challenges By combining embedded systems and IoT technology the system enhances realtime monitoring instant alert generation and location tracking This makes it more advanced compared to conventional security methods and suitable for applications such as vehicle protection locker security and personal asset safety Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026