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Desenvolvimento de um sistema loT com diferentes formas de interação
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Abstract(s)
A Internet das Coisas tem vindo a crescer de forma galopante, pois o uso da tecnologia
da informação e comunicação (TIC) pode tornar tudo mais inteligente. A IoT inclui todos os
dispositivos e objetos que podem ser conectados permanentemente à Internet, comunicar
entre si e trocar dados.
Este projeto tem como objetivo principal o estudo de diferentes formas de interação
de um utilizador com um sistema IoT, para averiguar qual a forma mais eficaz e prática de
interação. Foi desenvolvido um sistema IoT com suporte a diferentes formas de interação,
tais como, uma aplicação web, uma aplicação móvel e um assistente virtual. Este sistema
possui microcontroladores que incluem sensores e atuadores, dispersos num edifício ou casa.
Um sistema desta natureza gera uma enorme quantidade de dados. Por esse motivo, os dados
foram armazenados numa base de dados na cloud.
Para a criação do sistema, foram estipulados os requisitos funcionais e não funcionais
e desenhada a arquitetura do sistema. A arquitetura é constituída por um módulo
microcontrolador, um servidor central, por brokers MQTT, por uma base de dados remota,
por sensores e atuadores, por um website, aplicação móvel e por uma skill na Alexa. Para os
microcontroladores, foram usados NodeMCUs, que são equipamentos de baixo custo, com
suporte a ligações WiFi. No que diz respeito ao servidor central, que consiste numa API REST,
fica hospedado num Raspberry.
Foram realizados testes de usabilidade a cada uma das aplicações desenvolvidas. Para
estes testes, foi usado o questionário SUS (System Usability Scale). Por fim, foram realizadas
instalações em três casas para que os utilizadores pudessem interagir por mais tempo com o
sistema. O objetivo destas instalações foi poder inferir qual a melhor forma do utilizador final
interagir com um sistema desta natureza a fim de poder retirar conclusões sobre as diferentes
formas de interagir com o sistema e assim verificar qual das aplicações desenvolvidas mais se
adequa a um sistema IoT.
The Internet of Things has been growing at a fast rate, as the use of Information and Communication Technology (ICT) can make everything smarter. IoT includes all the devices and objects that can be permanently connected to the Internet, communicate with each other and exchange data. The main goal of this project is to study different ways of interaction of a user with an IoT system, to find out which is the most effective and practical way of interaction. An IoT system was developed that supports different forms of interaction, such as a web application, a mobile application and a virtual assistant. This system has microcontrollers that include sensors and actuators, dispersed in a building or house. A system of this nature generates a huge amount of data. For this reason, the data was stored in a cloud database For the creation of the system, the functional and non-functional requirements were stipulated, and the architecture of the system was designed. The architecture consists of a microcontroller module, a central server, MQTT brokers, a remote database, sensors and actuators, a website, a mobile application, and a skill at Alexa. For the microcontrollers, NodeMCUs were used, which are a low-cost equipment, with WiFi connection support. For the central server, which consists of a REST API, is hosted in a Raspberry. Usability tests were performed on each of the applications developed. For these tests, the SUS (System Usability Scale) questionnaire was used. Finally, installations were made in three houses so that users could interact with the system for a longer period of time. The objective of these installations was to be able to infer which is the best way for the end user to interact with a system of this nature in order to be able to draw conclusions about the different ways of interacting with the system and thus verify which of the applications developed is most suitable for an IoT system.
The Internet of Things has been growing at a fast rate, as the use of Information and Communication Technology (ICT) can make everything smarter. IoT includes all the devices and objects that can be permanently connected to the Internet, communicate with each other and exchange data. The main goal of this project is to study different ways of interaction of a user with an IoT system, to find out which is the most effective and practical way of interaction. An IoT system was developed that supports different forms of interaction, such as a web application, a mobile application and a virtual assistant. This system has microcontrollers that include sensors and actuators, dispersed in a building or house. A system of this nature generates a huge amount of data. For this reason, the data was stored in a cloud database For the creation of the system, the functional and non-functional requirements were stipulated, and the architecture of the system was designed. The architecture consists of a microcontroller module, a central server, MQTT brokers, a remote database, sensors and actuators, a website, a mobile application, and a skill at Alexa. For the microcontrollers, NodeMCUs were used, which are a low-cost equipment, with WiFi connection support. For the central server, which consists of a REST API, is hosted in a Raspberry. Usability tests were performed on each of the applications developed. For these tests, the SUS (System Usability Scale) questionnaire was used. Finally, installations were made in three houses so that users could interact with the system for a longer period of time. The objective of these installations was to be able to infer which is the best way for the end user to interact with a system of this nature in order to be able to draw conclusions about the different ways of interacting with the system and thus verify which of the applications developed is most suitable for an IoT system.
Description
Keywords
loT Alexa Microcontrolador Interação Computação na núvem Microcontroller Interaction Cloud computing Engenharia Informática . Faculdade de Ciências Exatas e da Engenharia