Arif Setia Sandi Ariyanto, et al. “Implementation and Performance Evaluation of ESP32-Based Multi-Sensor IoT System for Real-Time Environmental Monitoring and Early Warning”. JSAI (Journal Scientific and Applied Informatics), vol. 9, no. 1, Jan. 2026, pp. 118-25, doi:10.36085/jsai.v9i1.9861.