This channel monitors indoor air quality using an MQ-135 sensor and NodeMCU ESP8266. It measures gas concentrations (CO₂, NH₃, ethanol, benzene, smoke, etc.) and sends real-time PPM readings to ThingSpeak for visualization and analysis. The system include

The ThingSpeak channel for data transmission of concentrations of indoor pollutants and other parameters detected by AMIHAN - Air Monitoring for Indoors and Households: an Arduino Networking system.