Suud, J. and Chai, L.C.L. 2026. Spreadsheet-Native IoT Energy Monitoring: Design and Functional Demonstration of a Low-Cost ESP8266-PZEM Smart Meter. Journal of Engineering Science and Energy Sustainability. 1, 2 (Oct. 2026), 1–16. DOI:https://doi.org/10.33736/jese.13967.2026.