Development and Bench-Scale Functional Validation of a Low-Cost IoT Prototype for Classroom Environmental Quality Monitoring
This study reports bench-scale functional validation of a low-cost IoT proof-of-concept for classroom environmental monitoring. A Raspberry Pi integrates DHT-22 temperature–humidity sensing, an MQ-135 used only as a non-specific gas/air-quality proxy, an LDR relative light sensor, Python/Tkinter software, and prototype...