Gloria Polly VS, Manalu A, Simbolon KT, Manalu IP. LoRa-based IoT Device for Water Quality Monitoring (Case Study: Lake Toba). PISTON J.Tech.Eng [Internet]. 2024 Mar. 14 [cited 2024 Dec. 4];7(2):75-81. Available from: https://openjournal.unpam.ac.id/index.php/Piston/article/view/35854