HydroSignal: open-source internet of things information communication platform for hydrological education and outreach

This paper introduces HydroSignal, a low-cost, open-source platform designed to transform environmental monitoring and hydrological data visualization, making it accessible to educators, students, and the general public. By integrating internet of things (IoT) technology with a user-friendly web interface, HydroSignal enables real-time data acquisition and visualization of key hydrological parameters such as flood levels, turbidity, rainfall, soil moisture, and temperature. The platform's true contribution lies in its ability to empower users with hands-on, practical experience, enabling them to go beyond passive observation and actively engage with real-world hydrological data. Through four diverse use cases, HydroSignal demonstrates its flexibility in fostering data-driven decision-making, hands-on learning, and skill development across academic, educational, and community settings. By democratizing access to environmental data, HydroSignal not only simplifies the visualization of complex hydrological processes but also nurtures a deeper understanding of environmental monitoring, promoting STEM education, public engagement, and environmental awareness.