IoT for CO2 Surveillance in Volcanic Soil Using a Web-Based Monitoring and the LI-830 sensor. Study case in Cerro Pacho, El Salvador. - Omar Otoniel Flores-Cortez; Carlos Osmin Pocasangre; Fernando Arévalo; David Adriel Solis; Jefry Orlando Comayagua; Benancio Henríquez Miranda (ISNCC, 2024)