Pembuatan Sistem Monitoring Pengukur Ketinggian Air Menggunakan Sensor Ultrasonik Hc-Sr04 Berbasis Android

Abstract

The purpose of making an android-based water level gauge is to measure the water level using the HC-SR04 ultrasonic sensor. The sensor used in the manufacture of this height measuring device is an Ultrasonic Sensor type HC-SR04 which is controlled by the NODEMCU ESP8266 Microcontroller and is equipped with a display of measurement results on the Blynk Application. The results of testing and application, obtained the average relative error of water level at a distance of 1 cm by 4.08%, at a distance of 2 cm by 1.61%, at a distance of 3 cm by 1.13%, at a distance of 4 cm by 1.015% , at a distance of 5 cm by 0.98%