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Video 27: Measuring Distanc
====================================================

Learn how to use an ultrasonic sensor with an ESP32 microcontroller for accurate distance measurement and trigger actions based on distance thresholds.

* **Ultrasonic Sensor Basics**: Understand how ultrasonic sensors work by emitting waves and measuring their reflection for distance calculation.
* **Documentation Reference**: Access the documentation on docs.sunFounder.com for setup guidance for the ESP32 and ultrasonic sensor.
* **Ultrasonic Sensor Specifications**: Learn about the HC-SR04 ultrasonic sensor's specifications, including pin configuration and operating parameters.
* **Wiring Configuration**: Follow instructions to correctly wire the ultrasonic sensor to the ESP32 microcontroller for seamless integration.
* **Code Explanation**: Dive into the code explanation for interfacing with the ultrasonic sensor, including initializing pins and calculating distance from time measurements.
* **Practical Demonstration**: Witness a practical demonstration of distance measurement using the setup, including accuracy verification and triggering actions based on predefined distance thresholds.

**Video**

.. raw:: html

    <iframe width="700" height="500" src="https://www.youtube.com/embed/g3_Tj1_x2_U?si=mbVSC7rL7A1SvG-f" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

.. **Related On-line Tutorials**

.. * :ref:`ar_ultrasonic`