Design and Fabrication of Blue Shield Recon

Abstract

This research showcases the creation of an underwater control robot with live video output using an ESP32-CAM module and propulsion created with four 60 RPM DC geared motors. The robotic unit serves as a surveillance tool for limited-distance detection activities, including tank inspections and shallow aquatic investigations as well as elementary laboratory studies. To overcome underwater RF wave signal degradation and to establish a reliable power and data connection between the surface unit and the robot operation uses a physical tethered connection is used rather than wireless transmission. The bot's movement is managed by an L298N motor driver, while its main propulsion power switching is controlled by a relay module. The compact mechanical unit is positively buoyant while achieving electronic component protection through specialised waterproof sealing. Testing of the developed prototype took place within a water tank laboratory setup to check navigation capabilities together with stability and video streaming performance. The data proves the bot achieves both forward and backward movements together with turning capabilities, during stable video streaming between the submersible and surface. This research shows how basic components can work together to create a low-cost, wired underwater surveillance robot, opening the door to adding sensors and autonomous functionality.