Sofyan Radit Kurniawan, and Syamsudduha Syahrorini. “The Prototype for Measuring the Height and Monitoring of River Water Quality Based on the Internet of Things: Prototype Alat Pengukur Ketinggian Dan Pemantau Kualitas Air Sungai Berbasis Internet of Things ”. Procedia of Engineering and Life Science, vol. 1, no. 1, Apr. 2021, doi:10.21070/pels.v1i1.875.