25, September 2025

Design and Implementation of an ESP32-Based Bluetooth-Enabled Automatic Bell System with RTC Synchronization

VOLUME-11; ISSUE-9; SEPT-2025

Author(s): Dr. Kakade Sandeep , Mr. Kotalwar Girish , Miss. Kulkarni Saroja , Mr. Kunal Ardad

Authors Affiliations:

1Assistant professor, Department of Electronics & Telecommunication Engineering, Vilasrao Deshmukh foundation Group of Institutions, Latur, India

2Final Year Student, Department of Electronics & Telecommunication Engineering, Vilasrao Deshmukh foundation Group of Institutions, Latur, India

3 Final Year Student, Department of Electronics & Telecommunication Engineering , Vilasrao Deshmukh foundation Group of Institutions, Latur,  India

4 Final Year Student, Department of Electronics & Telecommunication Engineering , Vilasrao Deshmukh foundation Group of Institutions, Latur,  India

DOIs:10.2015/IJIRMF/202509030     |     Paper ID: IJIRMF202509030


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Time management plays a vital role in maintaining discipline and efficiency in schools, colleges, and organizations. Conventional bell systems often rely on manual operation or mechanical timers, which are prone to human error, inconsistency, and limited flexibility. To address these challenges, this paper presents an ESP32-based automatic bell system controlled through a Bluetooth-enabled mobile application. The system integrates a Real-Time Clock (RTC) module for accurate timekeeping, a relay driver circuit to operate the bell, and a dot matrix display for real-time status updates. Users can easily configure or modify schedules using a dedicated mobile interface, eliminating the need for technical reprogramming or continuous Internet access. The proposed design was implemented and tested under real-time conditions, demonstrating precise synchronization, reliable wireless communication within a range of 8–10 meters, and consistent bell operation with negligible delay. Comparative evaluation with existing systems shows that the developed solution offers a cost-effective, user-friendly, and offline-capable alternative suitable for educational institutions and small-scale organizations. The system can be extended to larger setups with multi-bell control, centralized scheduling and optional IoT connectivity.

   
Automatic bell system, ESP32 micro Controller, Bluetooth communication, Real-Time Clock (RTC), Wireless scheduling

Dr. Kakade Sandeep , Mr. Kotalwar Girish , Miss. Kulkarni Saroja , Mr. Kunal Ardad (2025); Design and Implementation of an ESP32-Based Bluetooth-Enabled Automatic Bell System with RTC Synchronization, International Journal for Innovative Research in Multidisciplinary Field, ISSN(O): 2455-0620, Vol-11, Issue-9, Pp. 209-215.         Available on –   https://www.ijirmf.com/

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