Ultrasonic Range Sensor Touch-Free Input Tutorial for Arduino / ESP32

This is the second video in a series in which I'll be considering various methods that can be used to replace a traditional Arduino button input with a touch-free interface instead, requiring no physical contact. This is just one possible consideration of how you can make an escape room (or any other public-facing Arduino interface) more "Covid-secure".
In this part I'll be looking at an "Ultrasonic Range Sensor" HC-SR04 component, which can be easily purchased online for only a dollar or so from, e.g. www.banggood.c...
It's a cheap, readily-available module that's easy to wire and code on an Arduino, ESP32, or other Microprocessor.
Timings
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00:00:00-00:00:21 Introduction
00:00:22-00:04:44 Demonstration
00:04:45-00:05:39 Hardware Wiring
00:05:40-00:19:11 Arduino Code Listing
00:19:12-00:20:09 Summary
Code & Wiring Downloads
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If you'd like to support me making more video tutorials explaining how to use tech in escape rooms and other playful settings, please check out my Patreon at / playfultech , where you can also find code downloads, wiring diagrams, and additional resources for this and all my other tech projects.

[@mfx1]

Maxbotix also make some very nice, clean (they have amazing filtering/processing/discrimination built in) accurate and easy to use ultrasonic sensors, not cheap but they do all the filtering/measuring in the sensor, freeing up the Arduino and can also be polled so multiple sensors don't interfere with each other.

[@WistrelChianti]

Esp32 mentioned which is 3.3v logic. I suspect some adjustment is needed for that however I think there is a new version of the sensor that works at both logic levels

[@fahrschule-peppermint]

where can i find the ultrasonic library?

[@xenvaldez2634]

can you help me how to answer yes or no questions in a web application using ultrasonic sensor? can you help me with the code using arduino ide? I'm using ultrasonic sensor and esp32

[@umar812]

did you have any answer?
I'm struggling

[@boopeshkumarprabhakaran]

Can I use same arduino nano code for esp32

[@Aashiq369hz]

Bruhh what project are you doing?