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The AQI is an index that tells you how clean or polluted your air is, and what associated health effects might be a concern for you.

In this latest IoT project, we are going to make an IoT Based Air Quality Index Monitoring System using the NodeMCU ESP8266 board in which we will monitor the Air Quality Index over a Thingspeak server using the internet. Air pollution can be monitored over IoT from any part of the world using the internet. We will use MQ135 Air Quality Sensor that can detect the level of various air pollutants. The Circuit Diagram, Source Code can be found in the below link.

Source Code/Program: https://how2electronics.com/iot-air-q...

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