Automation and Control System on Water Level of Reservoir based on Microcontroller and Blynk

The research aims to utilize simple technology using water level sensors, automatic switches, and the Blynk application to detect water levels automatically. The tools used are infrared switch sensor, ultrasonic sensor, ESP 8266 module, Arduino Nano, Blynk application, and mini submersible pump machine to replace automatic water filling. The results showed that the IoT method by retrieving data sent to a smartphone, using an internet connection and the Blynk application, can display data from the sensor without being limited by the distance between the data sender and receiver. The automatic water tank filling system tool has succeeded in measuring the height of the water level in the reservoir which has been implemented properly and is sufficiently curated with an error value of about 3%.