Automação residencial usando protocolo MQTT, Node-RED e Mosquitto Broker com ESP32 e ESP8266

Abstract

The Internet of Things (IoT) aims to analyse, control and integrate environments, with home automation being the application of IoT in the residential area, with the purpose of bringing comfort, safety and energy saving to the houses. The objective of this work is to present an integrated home automation solution with open source tools that may simplify its implementation. The publish/subscribe MQTT protocol was used with Mosquitto Broker. This protocol is capable of allowing clients in a network to communicate between themselves with the brokers mediation. As clients, the microcontrollers ESP32 and ESP8266 were used. The Node-RED tool was also used as a client, so that it may communicate with the broker and create a User Interface. A system was then created, thinking of an application to two rooms: a kitchen and an office. This system is capable of monitoring temperature, humidity and the state of safety alarms, besides also allowing the actuation of these alarms and of outputs represented by leds. Finally, the results are shown in the user interface, with specific screens for each room.