Desenvolvimento de um aplicativo mobile para controlar bancada eletropneumática via protocolo MQTT usando Raspberry Pi 4 e ESP32

Abstract

The COVID-19 pandemic made it impossible to carry out several tasks due to the safety measures. Among those activities, we have the practical classes of Industrial Automation at the Federal University of Uberlândia using an electro-pneumatic bench, the students were hindered because they had no oportunity to test the models of electro-pneumatic sequences, taught in theoretical classes, in the practice classes. However with the development of Industry 4.0, we have an architecture that can be used to solve problems like this, which is the Industrial Internet of Things (IIoT). The IIoT allows connecting devices, machines, and sensors in real time, bringing greater efficiency and increased productivity in various scenarios. One of the tools for carrying out this application is the Message Queuing Telemetry Transport (MQTT) protocol, which allows us to carry out communication between the devices connected to a network. Thus, this project presents a solution for carrying out practical classes by controlling the electropneumatic bench remotely through a cellphone application, presenting several technologies that can be adapted in environments beyond the university. The architecture of this project is composed of ESP32 microcontrollers to control the 5/2 valves with simple solenoid and spring return of the electro-pneumatic bench, Raspberry microcomputer to host the local MQTT broker, limit sensors that send the status information of the actuators and mobile application for Android devices.