Prototype of Home Power Monitoring Tool for Electrical Outlet Using ESP32

The use of electricity is increasing from year to year especially during the Covid-19 pandemic where more people are likely to work from home. It will affect the electricity bill. In order to reduce the electric cost in home sector, people must save the electrical usage. The problem is they do not know what equipment or activities in which the electrical outlet consumes more than the other outlets or which outlet is less efficient even though the electrical equipment in that outlet do not need the high power. Thus, the measuring tool of home power monitoring for electrical outlet was designed and prototyped based on internet of things using ESP32. The monitoring results can be seen online through website which gives the data of voltage, current, power, and power factor. The prototype is capable enough for measuring those electrical values which gave the average of relative error is under 20% compared to the measurement using Fluke Clamp-meter by testing non-linear loads or current household loads. The usage of this prototype makes it easier for the home electricity sector to find out which outlet uses the most power than the others.