Paper Title
REAL-TIME ELECTRICITY COST CALCULATOR AND MONITOR

Abstract
This article has studied and designed a device that can measure electrical energy and process it into electrical costs. which can display and store information on electrical energy and electricity costs Which can accurately check the actual energy and electricity costs. This article has studied and designed a device to calculate and track electricity costs in real time. To measure electrical energy and calculate electricity costs As well as displaying real-time electrical energy data and electricity costs. This article uses the PZEM-004t module as a device used to read electrical energy values and send the measured electrical energy data to the ESP32 microcontroller board. The microcontroller takes the function of calculating the energy values as electricity values and sending them. Data is exported to the Blynk platform that stores and displays data. The calculation of electricity costs in the research is based on the electricity tariff calculations of the Provincial Electricity Authority. Residential type From prototyping and testing equipment to calculate and track electricity costs in real time. It was found that the circuit inside the cabinet that measures electrical energy can work stably. The communication equipment you choose can send data for processing. As well as displaying real-time electricity and electricity costs accurately and accurately, Blynk is a platform that has limitations in terms of data storage. In order to store more information You can choose to use other platforms such as MySQL, PostgreSQL that can increase the amount of data storage. Keywords - Electrical Energy Value, Electricity Cost, Real Time, Microcontroller.