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Abstract
The tiny sensors used in roaring technology era is composed of the power supply with, computing facilities & communication of data with a network of the internet. Transfer of data among things can be materialized through lightweight, cheap and low bandwidth application layer protocol for which MQTT is the right choice. This protocol will publish-subscribe the topics via host performing as the server also termed as a broker. In this article, an ESP NodeMCU microprocessor-based hardware module with limited computing abilities is used along with numerous real-time analog and digital sensors. Interfacing of all these temperature, humidity & motion sensors has been described. For transmitting-receiving and routing of data was done through MQTT protocol. The bunch of devices communicating with each other emulates attest bed for the machine to machine communication which gets further enhanced to industry 4.0. The sensors provide condition based monitoring system and get the data to the subscribed clients on a smartphone or web-based service.
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