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AQI - The Air Quality Index Monitoring is build with ESP & MQ135 Sensor. Here we monitor the air quality on 0.96" I2C OLED Display and Thingspeak Server

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AQI - Air Quality Index Monitor

AQI - The Air Quality Index Monitoring is build with ESP & MQ135 Sensor. Here we monitor the air quality on 0.96" I2C OLED Display and Thingspeak Server

Pin Connections

MQ135 Sensor

  • Analog input pin to A0 of ESP
  • VCC to Vin of ESP
  • GND to GND of ESP

0.96″ OLED Display is an I2C Module so,

  • SDA to D2 of ESP
  • SCL to D1 of ESP
  • VCC to 3v3 of ESP
  • GND to GND of ESP

The value is Measured in Parts-per-million (abbreviated ppm), this is the ratio of one gas to another. For example, 1,000ppm of CO means that if you could count a million gas molecules, 1,000 of them would be of carbon monoxide and 999,000 molecules would be some other gases.

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AQI - The Air Quality Index Monitoring is build with ESP & MQ135 Sensor. Here we monitor the air quality on 0.96" I2C OLED Display and Thingspeak Server

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