Bidirectional Visitor Counter System
Keywords:
Real-Time Systems, Finite State Machine, IoT, Smart Building, Embedded Systems, Occupancy Monitoring, Arduino UNO, IR Sensor, Bidirectional CounterAbstract
This paper presents the design and implementation of a Bidirectional Visitor Counter System using paired Infrared (IR) sensors and an Arduino UNO microcontroller. The system accurately tracks real-time room occupancy, displays the count on a 16×2 LCD, automates room lighting via a relay module, and triggers a buzzer and LED alert when the preset maximum occupancy is reached. A Finite State Machine (FSM) governs the direction-detection logic by analysing the sequential order in which two sensor beams are interrupted. Prototype testing over 100 trials achieved greater than 95% counting accuracy with zero LCD display errors, validating the system as a cost-effective, reliable, and extensible smart building solution at a total hardware cost under INR 800.
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
