Monitoring Electrical Energy Consumption Through Impulse Detection Using LDR Sensors and Relay With NodeMCU ESP8266

Activities that are very dense in humans today, often ignore their concern for electricity consumption, such as allowing unused electronic equipment to turn on and lights on during the day. To save electricity at home, prevention efforts are needed by making a system for monitoring electricity consumption and control by utilizing digital technology that can be controlled remotely and works automatically. To make the electric energy consumption monitoring system not expensive, because we can utilize the impulse indicator from the kWh meter measuring device that is installed in each home. The devices used are impulse indicator LED on kWh Meter which can be censored by LDR every time the LED blinks, relay as remote control switch via the internet, NodeMCU ESP8266 as processor and sender of data from sensor and server as a place of recording data provided by NodeMCU with use ESP8266 as a WiFi connection via HTTP protocol and PHP language. Device testing is done starting from the LDR sensor that can work well, continued testing on the manual switch with good results, and testing the virtual button's performance against the relay also works well even though there is a delay between the button and the relay for 750ms, but not affect button performance with fundamental relays. From the overall test results, the system can be categorized as working well so that it is feasible to be implemented in homes for savings in the use of electricity.