Three sensors, one device. Real-time gas and air quality monitoring with a DHT11 weather reading, an animated OLED bar graph, buzzer alerts on threshold breach, and a three-screen rotating display cycling Air Quality → Gas Level → Weather.

Objectives: Integrate three sensors in one sketch · Build a rotating multi-screen UI · Manage multiple independent thresholds · Structure code that stays readable at scale

Components: Arduino Uno · MQ-6 · MQ-135 · DHT11 · SSD1306 OLED · buzzer

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

Chapters: Intro · System overview · Code