In this tutorial, we are going to learn how to use Arduino and MQ2 gas sensor to check the air quality by checking the concentrations of LPG, smoke, alcohol, propane, hydrogen, methane and carbon monoxide, or other flammable gasses.

Apr 1, 2022 · Make your very own smoke sensor with an Arduino and MQ-2 sensor, in this project you can learn how to calibrate the MQ-2 sensor to specifically react to smoke, other than that we have also built a custom PCB board for easy installation and application.

Let’s begin by connecting the MQ2 gas sensor module to your Arduino. Connect the VCC pin on the sensor to the 5V pin on the Arduino, and connect the GND pin on the sensor to one of the GND pins on the Arduino.

Mar 16, 2018 · The Grove Gas Sensor (MQ2) module is useful for gas leakage detection (home and industry). It is suitable for detecting H2, LPG, CH4 and CO.

Mar 28, 2025 · Components of the MQ-2 sensor module. MQ-2 gas sensor: main element responsible for detecting gases. Circuit board: includes a voltage comparator to manage digital output. Trimming potentiometer: allows you to calibrate the sensitivity for gas detection. Status LED: Indicates whether the sensor is on and/or has detected any gas.

Feb 2, 2025 · Interfacing an MQ2 gas sensor with an Arduino is a straightforward process that involves both hardware connections and software programming. The connection between Arduino and MQ2 Sensor is very simple. VCC: Connect the VCC pin of the MQ-2 sensor module to the 5V out pin on the Arduino. GND: Connect the GND pin to the ground pin on the Arduino.

Jun 27, 2022 · This article explains the interfacing of an MQ2 gas sensor with an Arduino (MQ2 Arduino gas sensor) to detect and measure the level of gas concentration in the environment.

Aug 7, 2019 · In this article we will give an example of the MQ2 / MQ-2 smoke / gas sensor program using Arduino UNO. Previously, we discussed a little about what is the MQ2 / MQ-2 smoke / gas sensor. MQ2 or MQ-2 is a sensor module that can be used to detect smoke or flammable gases at concentrations between 200 ppm – 10,000 ppm.

Feb 25, 2022 · Because in this tutorial we are going to interface MQ2 Gas Smoke Sensor with Arduino UNO. MQ2 gas sensors are employed to effectively detect smoke, alcohol, LPG, carbon monoxide, etc in the environment.

Dec 22, 2020 · In this article we are going to learn about interfacing MQ2 Gas Sensor with Arduino. This tutorial is for absolute beginners, where they can understand the concept of connecting a gas sensor with Arduino Uno. This tutorial can work as a gas alarm system. By adding few more components like buzzer and led will enhance the circuit.