Abstract: In high-risk military scenarios like terrorist attacks, ensuring the safety of troops and maintaining efficient operations is crucial. This project introduces "Guardian Eye"- a mobile surveillance and defense system controlled via a mobile application. It combines a standard-definition camera with a defensive mechanism for real-time monitoring and threat response. Using PIR sensors, the system enhances detection accuracy from bunkers. Ultrasonic sensors provide radar-like capabilities, allowing for precise distance measurement to nearby objects. With the Centroid-Tracker algorithm, the system accurately tracks intruders. The mobile app facilitates smooth control of the device across rugged terrains, delivering consistent surveillance and automated threat mitigation. 

Key Terms: Internet of Things (IOT), Machine Learning (Centroid Tracker), Mobile App Interface, Embedded Systems

| DOI: 10.17148/IARJSET.2025.125315