Sofyan Radit Kurniawan and Syamsudduha Syahrorini 2021. 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. 1, 1 (Apr. 2021). DOI:https://doi.org/10.21070/pels.v1i1.875.