Project Overview

Sentinel-X is an Arduino-based mobile robotic platform designed to combine Bluetooth wireless control, ultrasonic object detection, 180° scanning, directional tracking, and servo-based actuation in a single rover.

The project focuses on integrating multiple hardware and software components to demonstrate practical applications of embedded systems and robotics.

Key Features

Bluetooth Control: Enables wireless control of the rover through a Bluetooth-enabled device.

180° Ultrasonic Scanning: A servo-mounted ultrasonic sensor continuously scans the surrounding area.

Object Detection: Detects nearby objects using ultrasonic distance measurement.

Directional Tracking: When an object is detected, the scanning mechanism determines its direction and positions the servo mechanism accordingly.

Buzzer Alert: Provides an audible indication when an object is detected.

Servo-Based Actuation: Includes a user-controlled servo-actuated demonstration mechanism.

Mobile Robotic Platform: Uses DC geared motors for movement and navigation.

Working Principle

The ultrasonic sensor is mounted on a servo motor that allows it to scan approximately 180° from left to right. During scanning, the sensor measures the distance to objects in its surroundings.

When an object is detected within the defined range, the Arduino processes the sensor readings and determines the approximate direction of the object. The servo mechanism is then positioned toward that direction, while the buzzer provides an alert.

The rover's movement and user-controlled functions are operated wirelessly through the Bluetooth module, allowing the system to combine automatic sensing with manual control.

Technologies & Components

1. Arduino Uno

2. Embedded C / Arduino IDE

3. HC-05 Bluetooth Module

4. HC-SR04 Ultrasonic Sensor

5. SG90 Servo Motors

6. L298N Motor Driver

7. DC Geared Motors

8. Buzzer

9. 4-Wheel Robotic Chassis

Learning Outcome

This project provided practical experience in integrating microcontrollers, sensors, actuators, wireless communication, and motor-control systems. It also strengthened understanding of real-time sensor processing and hardware-software integration in robotic applications.