{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T10:40:53Z","timestamp":1777632053132,"version":"3.51.4"},"reference-count":18,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,6]],"date-time":"2022-09-06T00:00:00Z","timestamp":1662422400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Sciences and Engineering Research Council of Canada (NSERC)"},{"name":"School of Graduate Studies (SGS) Memorial University"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This article describes a low-cost Supervisory Control and Data Acquisition (SCADA) system for a PV plant with local data logging. Typically, SCADA systems that are available on the market are proprietary (commercial), which are expensive and individually configured for a particular site. The main objective of this paper is to design a low-cost and open-source monitoring solution (hardware and software) to meet the requirements. The hardware used for this SCADA consisted of Arduino, Raspberry Pi, sensors, serial communication cables, and an open-source web view platform. This open-source platform manipulates, logs, and visualizes PV and environmental data. Emoncms runs on the Debian operating system. Field instruments were connected to two remote terminal units (RTUs). A PV array provided data to the RTU1, while an inverter output provided data to the RTU2, and the Raspberry Pi received the collected data in JSON format. As these data arrived, Emoncms used Emonhub as its main module, which refines data and then displays it on Emoncms\u2019s WebView. The Raspberry Pi also stores data locally. Data logging was tested for 6 h, but the final results showed that data logging can last much longer. From an hour to a year, the data trend can be viewed on a user-friendly dashboard.<\/jats:p>","DOI":"10.3390\/s22186733","type":"journal-article","created":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T04:18:32Z","timestamp":1662610712000},"page":"6733","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Low-Cost, Open-Source, Emoncms-Based SCADA System for a Large Grid-Connected PV System"],"prefix":"10.3390","volume":"22","author":[{"given":"Luqman","family":"Ahsan","sequence":"first","affiliation":[{"name":"Department of Electrical and Computer Engineering, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. Johns, NL A1C 5S7, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5855-2700","authenticated-orcid":false,"given":"Mirza Jabbar Aziz","family":"Baig","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. Johns, NL A1C 5S7, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7056-4811","authenticated-orcid":false,"given":"Mohmmad Tariq","family":"Iqbal","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. Johns, NL A1C 5S7, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,6]]},"reference":[{"key":"ref_1","unstructured":"(2022, July 25). Inductive Automation. Available online: https:\/\/inductiveautomation.com\/resources\/article\/what-is-scada."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Ahsan, L., and Iqbal, M.T. (2021, January 27\u201330). Design of an Optimal Hybrid Energy System for a Captive Power Plant in Pakistan. Proceedings of the 2021 IEEE 12th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON), Vancouver, BC, Canada.","DOI":"10.1109\/IEMCON53756.2021.9623260"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"195","DOI":"10.5455\/jjee.204-1644676329","article-title":"Dynamic Modeling of an Optimal Hybrid Power System for a Captive Power Plant in Pakistan","volume":"8","author":"Ahsan","year":"2022","journal-title":"Jordan J. Electr. Eng."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1626","DOI":"10.1109\/TASE.2020.3013760","article-title":"Detection and Differentiation of Replay Attack and Equipment Faults in SCADA Systems","volume":"18","author":"Li","year":"2021","journal-title":"IEEE Trans. Autom. Sci. Eng."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1874","DOI":"10.1002\/ese3.1130","article-title":"Monitoring of renewable energy systems by IoT-aided SCADA","volume":"10","author":"Qays","year":"2022","journal-title":"Energy Sci. Eng."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Abdulsalam, A.B., Alsaadi, H.A.J., and Hamodat, Z. (2022, January 9\u201311). Control and Management of Solar PV Grid Using Scada System. Proceedings of the 2022 International Congress on Human-Computer Interaction, Optimization and Robotic Applications (HORA), Ankara, Turkey.","DOI":"10.1109\/HORA55278.2022.9799994"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"57","DOI":"10.3934\/ElectrEng.2020.1.57","article-title":"Design and implementation of a low-cost, open source IoT-based SCADA system using ESP32 with OLED, ThingsBoard and MQTT protocol","volume":"4","author":"Lawrence","year":"2020","journal-title":"AIMS Electron. Electr. Eng."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Oton, C.N., and Iqbal, M.T. (2021, January 1\u20134). Low-Cost Open Source IoT-Based SCADA System for a BTS Site Using ESP32 and Arduino IoT Cloud. Proceedings of the 2021 IEEE 12th Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON), New York, NY, USA.","DOI":"10.1109\/UEMCON53757.2021.9666691"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.enbuild.2012.01.041","article-title":"A SCADA system for energy management in intelligent buildings","volume":"49","author":"Figueiredo","year":"2012","journal-title":"Energy Build."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Kermani, M., Carn\u00ec, D.L., Rotondo, S., Paolillo, A., Manzo, F., and Martirano, L. (2020). A Nearly Zero-Energy Microgrid Testbed Laboratory: Centralized Control Strategy Based on SCADA System. Energies, 13.","DOI":"10.3390\/en13082106"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Li, S., Jiang, B., Wang, X., and Dong, L. (2017). Research and Application of a SCADA System for a Microgrid. Technologies, 5.","DOI":"10.20944\/preprints201703.0068.v1"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Zare, A., and Iqbal, M.T. (2020, January 9\u201312). Low-Cost ESP32, Raspberry Pi, Node-Red, and MQTT Protocol Based SCADA System. Proceedings of the 2020 IEEE International IOT, Electronics and Mechatronics Conference (IEMTRONICS), Vancouver, BC, Canada.","DOI":"10.1109\/IEMTRONICS51293.2020.9216412"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"230","DOI":"10.37394\/232016.2020.15.27","article-title":"Demand Response Management Algorithm for Distributed Multi-Utility Environment in Smart Grid","volume":"15","author":"Priya","year":"2020","journal-title":"WSEAS Trans. Power Syst."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"46","DOI":"10.37394\/232017.2021.12.7","article-title":"Optimal Model Predictive Frequency Control Management of Grid Integration 490 PV\/Wind\/FC\/Storage Battery Based Smart Grid Using Multi Objective Particle Swarm Optimization MOPSO","volume":"12","author":"Elgammal","year":"2021","journal-title":"WSEAS Trans. Electron."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"L\u00e1z\u00e1r, E., Etz, R., Petreu\u015f, D., P\u0103t\u0103r\u0103u, T., and Ciocan, I. (2015, January 22\u201325). SCADA development for an islanded microgrid. Proceedings of the 2015 IEEE 21st International Symposium for Design and Technology in Electronic Packaging (SIITME), Bra\u015fov, Romania.","DOI":"10.1109\/SIITME.2015.7342314"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Kelati, A., and Gaber, H. (2021, January 11\u201313). IoT for Home Energy Management (HEM) Using FPGA. Proceedings of the 2021 IEEE 9th International Conference on Smart Energy Grid Engineering (SEGE), Oshawa, ON, Canada.","DOI":"10.1109\/SEGE52446.2021.9534986"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"15261","DOI":"10.1109\/ACCESS.2022.3147484","article-title":"Design, Deployment and Performance Evaluation of an IoT Based Smart Energy Management System for Demand Side Management in Smart Grid","volume":"10","author":"Saleem","year":"2022","journal-title":"IEEE Access"},{"key":"ref_18","unstructured":"(2022, July 15). EmonHub Configuration. Available online: https:\/\/github.com\/openenergymonitor\/emonhub\/blob\/emon-pi\/configuration.md."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/18\/6733\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:24:25Z","timestamp":1760142265000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/18\/6733"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,9,6]]},"references-count":18,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2022,9]]}},"alternative-id":["s22186733"],"URL":"https:\/\/doi.org\/10.3390\/s22186733","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,9,6]]}}}