This project presents a Night-Patrolling Robot for women’s safety that provides continuous 360° visual monitoring and rapid alerting when suspicious sounds are detected. The mobile platform is driven by DC motors through an L293D motor driver and powered by a 12 V battery with an LM2596 module providing regulated 5 V for logic. Four ESP32-CAM modules are mounted to give full 360° coverage; when any of the four sound sensors detects a noise above a configurable threshold, the Arduino UNO (system controller) triggers the nearest ESP32-CAM(s) to capture images and forward them to a predefined email address. Simultaneously, the GPS module acquires the robot’s coordinates and the GSM module transmits a concise SMS alert with location to emergency contacts. The system therefore fuses acoustic sensing, real-time imaging, geolocation, and cellular messaging to deliver fast, actionable alerts—useful for night patrols, campus security, and personal protection. The architecture emphasizes low cost, modularity, and reliability: sound sensors minimize false alarms by requiring sustained or pattern-based triggers, ESP32-CAMs handle image capture and uplink, and the GSM+GPS pair ensure alerts reach recipients even where Wi-Fi is unavailable. Optional night-vision illumination (IR LEDs), battery status monitoring, and simple autonomous patrol logic can be added to increase effectiveness.

 

The Major building blocks of this project are:

• Arduino UNO.
• DC motor with L293D motor driver.
• Four sound sensors.
• Four ESP32 Camera module.
• GPS.
• GSM.
• Rechargeable Battery.

   

   

     

   

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