Intelligent Access Control Using RFID and IoT Blynk Interface

Abstract

This paper presents an Internet of Things (IoT)-based remote access security system that combines Radio Frequency Identification (RFID) technology with the capabilities of the Blynk mobile application for enhanced security and convenience. Built upon the foundational concept of IoT—interconnecting physical devices embedded with sensors, software, and network capabilities—this system enables real-time data exchange and remote control over secure access points via the Internet. IoT applications have already transformed our daily lives by facilitating smart city infrastructure and increasing the security of residential and commercial spaces. With this in mind, the current project leverages IoT to design a smart access system that can monitor and control entry points remotely. The system employs an EM18 RFID reader, NodeMCU ESP8266 Wi-Fi module, and software tools like Arduino IDE and Blynk. The NodeMCU, which serves as the central controller, interfaces with the RFID module and other components, handling data processing and communication with the Blynk app. The RFID reader scans authorized tags to authenticate users, and the Blynk app allows users to monitor and control the door lock status from anywhere in the world, providing real-time security monitoring and control through smartphones. This implementation of RFID-based access management not only improves security by restricting unauthorized entry but also offers convenience with remote accessibility. This paper details the system's design, implementation, and operation, highlighting the role of the Blynk app in managing device interactions and enabling user control through a user-friendly mobile interface. The proposed IoT-based security solution demonstrates the potential of integrating IoT, RFID, and mobile applications to create a secure, flexible, and scalable access control system suitable for residential and commercial environments.