SUUD, J.; CHAI, L. C. L. Spreadsheet-Native IoT Energy Monitoring: Design and Functional Demonstration of a Low-Cost ESP8266-PZEM Smart Meter. Journal of Engineering Science and Energy Sustainability, [S. l.], v. 1, n. 2, p. 1–16, 2026. DOI: 10.33736/jese.13967.2026. Disponível em: https://publisher.unimas.my/ojs/index.php/JESE/article/view/13967. Acesso em: 4 nov. 2026.