An Implementation and Development of Distributed Visualized Information Device via MQTT Broker Based on Internet of Thing Technology

The visualized information is a critical issue of information systems, especially, instant and emergent information generated from mass devices with environmental sensing sensors distributed in living, home, factory, metropolitan, and so on. There is critical and instant information not only to be stored in the database but also visualized. Thus, the traditional techniques of information systems collect, store, summarise, and report but failed to reflect the urgency. Therefore, we try to integrate the Internet of Things and message queue telemetry transport (MQTT) to develop and implement a prototype device embedded in a tiny system to achieve instant and visualized information encapsulated in a box or shell and to support requested users with the independent and isolated device only. Thus, the devices are entitled as distributed visualized information device (DVID) that solves the instant visualized issues of the specialized information from a cloud platform, connect sensor devices, or any information system. This study uses the ESP32 microcontroller unit as a centurial-processor to integrate the dot matrix display for a large size display and a thin-film-transistor liquid-crystal display (TFT LCD) as a portable display to demonstrate the feasibility and usability of research goals. The devices connect to the cloud platform, subscribe to the MQTT Broker, and collect data to visualize the information without extra sub-system supports of the information systems to work independently.