LAUSR

In this paper, a prototype DC electric system was practically designed.  The idea of the proposed system was derived from the microgrid concept. The system contained two houses each have a DC generator and load that consists of four 12V DC lamps.  Each house is controlled fully by Arduino UNO microcontroller to work in Island mode or connected it with the second house or main electric network. House operating mode depends on the power generated by its source and the availability of the main network. Under all operating cases, the minimum price of electricity consumption should satisfy as possible. Information between the houses about the operating mode and the main network state was exchanging wirelessly with the help of the RF-HC12. This information uploaded to the Ubidots platform by the Wi-Fi-ESP8266 included in the Node MCU microcontroller. This platform has several advantages such as capture, visualization, analysis, and management of data.  The system was examined for different cases to verify its working by varying the load in each building. All tested states showed that the houses transfer from one mode to another automatically with high reliability and minimum energy cost. The information about the main grid states and the sources of the houses were monitored and stored at the Ubidots platform.