IoT System for Household Electrical Appliance Monitoring and Control

The use of electrical energy is currently still less effective because much electronic equipment consumes electricity excessively. Many users often leave their electronic equipment turned on, increasing electricity bills. Using communication, computer, and information technology to monitor and control electrical energy use will increase efficiency and reduce household electricity consumption costs. Therefore, we created an IoT-based monitoring and control system for household electrical energy consumption for savings. This IoT system consists of NodeMCU ESP32, PZEM004T sensor, RTC DS1302 module, relay, and blynk application. The monitoring system uses the PZEM-004T sensor as a current, voltage, and power reader. The results of this reading will be processed by the NodeMCU ESP32, which will later be displayed on the blynk application. Then the relay is to turn off or turn on electrical equipment, and the RTC module functions as a timer to determine the on/off hours of electrical equipment. With the help of the NodeMCU ESP32 and the blynk application, this system will be able to monitor electricity usage in real-time and control electricity consumption at home anytime and anywhere remotely. Based on tests conducted in boarding houses by comparing before and after using the system for household appliances such as lights, fans, tv, and rice cookers for 1 week, a savings of 1.53 kWh was achieved.