Development of an IoT Based Open Source SCADA System for PV System Monitoring

This paper presents the development of a low cost, open source Supervisory Control and Data Acquisition (SCADA) system for solar photovoltaic (PV) system monitoring and remote control. The proposed SCADA system is based on the Internet of Things (IoT) SCADA architecture which incorporates web services with the conventional SCADA for a robust supervisory control and monitoring. It comprises of analog Current and Voltage sensors for acquiring the desired data from the solar PV system, Arduino Uno micro-controller which serves as a Remote Terminal Unit to receive the acquired sensor data, Raspberry Pi with a Node-RED programming tool for parsing the acquired data (Communication Channel), and Emoncms Local Server IoT Platform for data storage, monitoring and remote control (Master Terminal Unit). The developed SCADA system was set up to monitor and control a 260W, 12V solar PV panel in the Electrical and Computer Engineering Laboratory at Memorial University, and some of the created Dashboards and Charts showing the acquired data on Emoncms server where an operator can monitor the data in the cloud using both a computer with internet access, and Emoncms mobile app are presented in the paper.