The MQ-6 gas sensor — types of gas sensors, how the sensing element works, pinout — then a real-time LPG leak detector with an OLED readout and a buzzer alarm at a tested threshold of 500.

Objectives: Explain MOS gas sensing · Read an analog gas value · Set and justify an alarm threshold · Drive a buzzer from a condition

Components: Arduino Uno · MQ-6 · SSD1306 OLED · buzzer

Code: https://github.com/Arun-Roshan/Gas-Safety-Monitoring-System-Using-IOT.git — Gas Safety repo

Chapters: MQ-6 · Types of gas sensor · How it works · Pinout · Gas leak detection · Code explained · Demo