อ่านอุณหภูมิและความชื้น

Your sensor is wired and the library is ready. Now you will ask it for real numbers and print them to the Serial Monitor. 🌡️

Call readTemperature() to get the current value in Celsius. Store it in a float because the reading often has decimals.

Call readHumidity() to get the moisture in the air as a percentage. Like temperature, save it in a float variable.

Pass true to readTemperature to get Fahrenheit instead of Celsius. One small argument switches the whole unit.

Send your readings to the Serial Monitor so you can watch them live. Labels next to numbers make the output easy to read.

You can print temperature and humidity together on one line. A short label before each value keeps the data clear.

A DHT updates only about once per second. Reading faster than that just returns stale or failed values, so be patient.

Add a short delay() at the end of loop so you read at a sensible pace. Two seconds is a safe, comfortable gap.

The library can also estimate the heat index, how hot it feels, from temperature and humidity together. It is one handy call.

Once you have the numbers, you can act on them: turn on a fan above a threshold or log values for later analysis.

Save each reading into a variable once per loop, then reuse it. Calling the sensor many times in a row only slows you down.

You want the temperature in Fahrenheit. Which call returns it?

You read temperature and humidity into floats, printed them with labels, paced the loop, and even computed how hot it feels. 🎉