How to use MQ2 Gas Sensor with Arduino Uno

Published: 30 November 2023
on channel: Passion Tech KLM

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Download the code here;https://github.com/passion-tech/Hello...

In this example, the gas sensor reading is compared to a threshold value (500 in this case). If the gas concentration exceeds this threshold, it will display "Gas detected!" on the LCD and trigger the relay. You may need to adjust the threshold based on your sensor's specifications and the environment in which you are using it.

Make sure to connect the components correctly, and consult the datasheets for the MQ-2 gas sensor, relay, and LCD to ensure proper usage and wiring. Additionally, handle the relay output carefully, especially if it's controlling high-voltage devices, and ensure safety precautions are in place.

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