Simply connect the Sensor's output to any digital pin on the Arduino and check for a high pulse; if the Arduino reads a high pulse, Gas has been detected; if the Arduino reads a low pulse, no Gas is ...

Any potential entry person can just toss the ball into the area and remotely receive the gas and smoke levels via voice from several hundred meters away. I used an MQ2 smoke, LPG (Liquified Petroleum ...

Arduino Code for Interfacing MQ-2 Gas Sensor Module. The code for the Arduino mq-2 gas sensor module is very simple and easy to understand. ... Copy Code // Sensor pins pin D6 LED output, pin A0 ...

In this proposed project, we have interfaced Arduino Uno with MQ2/MQ6 sensors, SIM900A GSM module, servo motor, buzzer, and LED. The interfacing is done in such a way that whenever there is a gas leak ...

#define LED_BUILTIN 13. This indicates digital pin 13 on the Arduino's pins connector (also called a header). But at the same time LED_BUILTIN tells the Arduino to use the actual built-in LED on ...