OR Logic Gate-Based NodeMCU (ESP8266) Supported IoT Simulation

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COSKUN O., DEMIREL E. C. G.

Cumhuriyet Science Journal, cilt.47, sa.3, ss.598-605, 2026 (TRDizin)

Özet

This study utilizes digital electronic circuits as a practical framework for teaching binary-based logic gates. To this end, an experimental Internet of Things (IoT) circuit was developed, integrating a NodeMCU V3 microcontroller with an OR logic gate configuration. The web server system, which is at the centre of the design, is based on NodeMCU V3 (ESP8266). This enables simultaneous and multi-user simulation of logic operations via web browsers, independent of a physical experimental setup. This approach successfully overcomes the physical and economic limitations of traditional laboratory environments, providing high accessibility and resource efficiency, particularly in distance learning processes. From a physical perspective, the system can be regarded as the transfer of switching theory in semiconductor technologies and binary signal transmission to a distributed structure via network protocols. Nevertheless, the originality of the work lies in the structural similarity of this logical framework to biophysical processes. In the domain of biophysics, the processes of nerve transmission and synaptic integration are regarded as the biological counterparts of complex logic gates. The sum of different stimuli required for a neuron to reach its threshold value can be modelled using a logical OR gate. The proposed experimental setup serves as a tangible simulation platform for students in engineering, physics, and biophysics, enabling the modeling of threshold-driven biological processes such as action potentials and 'all-or-nothing' ion channel dynamics. Furthermore, its implementation fosters a cost-effective and scalable educational framework that promotes interdisciplinary synergy.