Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hanan Hanan and Anak Agung Ngurah Gunawan and Made Sumadiyasa,Water Level Detection System Based on Ultrasonic Sensors HC-SR04 and ESP8266-12 Modules with Telegram and Buzzer Communication Media,Instrumentation Mesure Métrologie,1631-4670,International Information and Engineering Technology Association,2019-08-30,18,3,305-309,https://cir.nii.ac.jp/crid/1360862407245369344,https://doi.org/10.18280/i2m.180311