# Reto 5 Mejorando intrusos

##### <span style="color: rgb(22, 145, 121);">**Enunciado**</span>

El sensor de ultrasonidos es un pesado, da falsas alarmas, añade el sensor PIR para quitarlas.

<span style="color: rgb(22, 145, 121);">**Solución 1**</span>

<span style="color: rgb(22, 145, 121);"><span style="color: rgb(0, 0, 0);">ver, </span></span>[<span style="color: rgb(0, 0, 0);">https://wiki.elecfreaks.com/en/microbit/wisdom-life/microbit-smart-agriculture-kit/microbit-Smart-Agriculture-Kit-case-04/</span>](https://wiki.elecfreaks.com/en/microbit/wisdom-life/microbit-smart-agriculture-kit/microbit-Smart-Agriculture-Kit-case-04/)

[https://makecode.microbit.org/S25361-76721-60771-88083](https://makecode.microbit.org/S25361-76721-60771-88083)

<div id="bkmrk-" style="position: relative; height: 0; padding-bottom: 70%; overflow: hidden;"><iframe frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin" src="https://makecode.microbit.org/#pub:S25361-76721-60771-88083" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"></iframe>

</div><iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen="allowfullscreen" frameborder="0" height="815" src="https://www.youtube.com/embed/Gzih24NDcDM" title="30 de septiembre de 2026" width="458"></iframe>

<span style="color: rgb(22, 145, 121);">**Solución 2**</span>

Aquí se utiliza la función AND

[![2026-09-29 20&#95;21&#95;56-Greenshot.png](https://libros.catedu.es/uploads/images/gallery/2026-09/scaled-1680-/2026-09-29-20-21-56-greenshot.png)](https://libros.catedu.es/uploads/images/gallery/2026-09/2026-09-29-20-21-56-greenshot.png)

pero en la función VER ya definimos PIR con su valor y lo visualizamos

[![2026-09-29 20&#95;22&#95;41-Greenshot.png](https://libros.catedu.es/uploads/images/gallery/2026-09/scaled-1680-/2026-09-29-20-22-41-greenshot.png)](https://libros.catedu.es/uploads/images/gallery/2026-09/2026-09-29-20-22-41-greenshot.png)

[https://makecode.microbit.org/S46838-99630-55860-40869](https://makecode.microbit.org/S46838-99630-55860-40869)

<div id="bkmrk--5" style="position: relative; height: 0; padding-bottom: 70%; overflow: hidden;"><iframe frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin" src="https://makecode.microbit.org/#pub:S46838-99630-55860-40869" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"></iframe>

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