How It Works

How It Works

The ESP32 first provides power to the DHT11 or DHT22 temperature and humidity sensor through its 3.3V and GND connections. Once powered, the sensor continuously monitors the surrounding environment and measures both temperature and relative humidity.

When the ESP32 requests a measurement, the DHT sensor sends the collected data through its digital DATA connection. In this project, the DATA line is connected to GPIO 4 of the ESP32, allowing the microcontroller to receive the sensor readings digitally.

The ESP32 then processes the incoming data and separates it into two useful values: temperature and relative humidity. The program can be configured to take readings at regular intervals, such as once every few seconds, making it possible to monitor changes in the surrounding environment.

Finally, the measured values can be displayed through the Arduino IDE Serial Monitor or presented on a simple ESP32 web page. With Wi-Fi enabled, the web page can be accessed from a phone or computer connected to the same network, turning the project into a basic IoT environmental monitoring system.