Air Quality Monitor

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
  air quality, mq135, nodemcu, iot, indoor pollution, gas sensor, esp8266, thingspeak, ppm

Field 1 Chart