The DHT11 digital temperature and humidity sensor — types, pinout, and a monitoring build with an animated OLED bar graph and a buzzer that fires when safe temperature or humidity limits are exceeded.

Objectives: Distinguish digital from analog sensors · Read the DHT11 with a library · Handle two variables and two thresholds in one sketch

Components: Arduino Uno · DHT11 · SSD1306 OLED · buzzer

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

Chapters: Intro · DHT11 · Types · Pinout · Project · Code explained · Demo