IOT Based Gas Level Monitoring over Internet Using ESP8266

In this project, we will learn about Gas Level Monitoring Over Internet Using ESP8266 & Gas Sensor Module, i.e MQ135. We will measure the quantity of gas in percentage and send it over the internet using the thingspeak server. With this system, the data can be monitored remotely staying at any part of the world.
We just need a gas/smoke/LPG sensor like MQ2/MQ3/MQ5/MQ7/MQ135 that is directly connected to Nodemcu ESP8266-12E Module.

Source Code Link: https://how2electronics.com/gas-level...
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