Implementation of WebSockets in ESP32 based IoT Systems

This paper presents implementation of the WebSocket communication method in Internet of Things systems that are based on ESP32 microcontroller. Impacts of using this technique for the real-time data transfer in Wi-Fi networks and its comparison to the standard polling techniques are discussed. For the proper comparison, special circuit is designed in order to stress the hardware part of the system and client-server communication. Also, for the real-time data receipt a web server application is designed and used to visualize received values. Efficiency of the data transfer methods are compared and discussed.