Desenvolvimento de um sistema supervisório para medição de voltagem utilizando MQTT.

Abstract

The Internet of Things (IoT) has transformed many areas by making it possible to connect sensors and devices to control and monitoring systems in real time. In this scenario, the creation of monitoring systems to measure voltage in industrial environments has become important for increasing operational efficiency and facilitating preventive maintenance. One of the main challenges faced by these systems is to guarantee communication that is both reliable and effective, using protocols that require low power consumption and operate continuously in resource-constrained environments. With this in mind, this research has developed and implemented a system capable of taking precise electrical voltage measurements, transmitting the data collected continuously and reliably via the MQTT protocol to a supervisory platform in the cloud. The methodology adopted involved using the ZMPT101B sensor to capture the electrical signals, an ESP8266 microcontroller with Wi-Fi connectivity to process and send the data, and the Adafruit IO platform to visualize and manage the information via configurable dashboards. Operating voltage limits were set between 60V and 140V, with automatic alerts implemented in cases of undervoltage or overvoltage. The results demonstrated the accuracy of the measurements, the stability of the communication via MQTT and the efficiency of the remote supervision. The system developed proved to be viable, low-cost and applicable to industrial, academic and laboratory environments that require continuous electrical monitoring.