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Lesson 21:  Temperature and Humidity Measurements with Toggle Switch
=============================================================================

This tutorial covers adding a toggle push button to switch between temperature readings in Fahrenheit and Celsius using the DHT11 sensor with the Raspberry Pi Pico W:

* **Introduction**: Introduces the tutorial and explains adding a toggle button to the setup.
* **Previous Lessons Recap**: Reviews using the DHT11 sensor.
* **Component Introduction and Circuit Setup**: Describes wiring the DHT11 sensor and push button.
* **Code Explanation**: Imports libraries, sets up GPIO, creates a toggle for Celsius/Fahrenheit, and formats output.
* **Practical Demonstration**: Shows code execution and toggling between Celsius and Fahrenheit readings.
* **Homework Assignment**: Adds more toggles to switch between Celsius, Fahrenheit, and humidity displays.

**Video**

.. raw:: html

    <iframe width="700" height="500" src="https://www.youtube.com/embed/MrfIfndX7OM?si=d1WrCY-6Ui7J2DWb" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>