Design of an IoT Energy Monitoring System

In this paper, we design and implement a low-cost IoT energy monitoring system that can be used in many applications, such as electricity billing system, energy management in smart grid and home automation. The design is based on a low-cost PZEM-004T, using non-invasive CT sensors, SD3004 electric energy measurement chip and ESP8266 Wemos D1 mini microcontroller for retrieving data from sensor nodes and sending data to server via internet. The experimental results showed that the developed energy monitoring system can successfully record the voltage, current, active power and accumulative power consumption.