Abstract: SCADA  is the acronym that stands for Supervisory Control and Data Acquisition system . Acquiring data in real-time, it can impose supervisory control over the module to monitor and manage states. It comprises of gathering data, exchanging it back to a centralized system, completing essential investigation and control, and after that showing this information on various administrator screens. This paper mainly focuses on the architecture to build a 4th generation SCADA Unit with voltage regulation for automation (Internet of Things)  which uses cloud topology to build a scalable and a reliable system. A cloud controlled  system which can be operated remotely by using internet which provides maximum flexibility in operation of the unit as well as a solid platform in cloud based automation.
Keywords: IOT, Arduino, SCADA, 4th Generation, Middleware, ESP.