Implementation and Analysis of IoT Based Automation Using MQTT

Internet of Things (IoT) allows the communication among various technology and devices that employing the internet with both the capacity to assemble and trade the information. Various devices have been frequently used small-scale controllers like Arduino. Communication between a set of devices connected over a network to communicate under the domain of the “Internet of Things” can deploy various communication models for information exchange. Internet of thing uses several protocol (e.g. HTTP, CoAP, MQTT etc.) in application layers for the transmission of data. MQTT is a protocol that uses the Publisher subscriber concept for communication. MQTT is used to perform several number of tasks to explore its functionality further. In IoT, Energy management in the buildings is an open challenge to the researcher. As a result, the IoT-based Automation system is constructed in this work using the MQTT protocol, in which the energy management is the basic key feature. Further an investigations have been carried out with communication between devices in IoT environment. A setup is established with the connection of devices with complex functionally such as RaspberryPi and NodeMCU (Wi-Fi) to analyze the performance of MQTT when several devices with high request/response ratio are connected to it. This paper is based on the communication between the RaspberryPi and NodeMCU using the MQTT protocol. Here, RaspberryPi act as a server and NodeMCU acts as the client. These devices control each other's devices with the help of MQTT protocol. This proposed system allows the users to remotely monitor their device form anywhere. It will help to save, monitor and control the light and energy in any type of buildings.