forked from microsoft/devicescript
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathanalog.html
More file actions
34 lines (34 loc) · 42.1 KB
/
Copy pathanalog.html
File metadata and controls
34 lines (34 loc) · 42.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
<!doctype html>
<html lang="en" dir="ltr" class="docs-wrapper docs-doc-page docs-version-current plugin-docs plugin-id-default docs-doc-id-developer/drivers/analog">
<head>
<meta charset="UTF-8">
<meta name="generator" content="Docusaurus v2.4.1">
<title data-rh="true">Analog | DeviceScript</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://microsoft.github.io/devicescript/developer/drivers/analog"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Analog | DeviceScript"><meta data-rh="true" name="description" content="Mounts an analog sensor"><meta data-rh="true" property="og:description" content="Mounts an analog sensor"><link data-rh="true" rel="icon" href="/devicescript/img/favicon.svg"><link data-rh="true" rel="canonical" href="https://microsoft.github.io/devicescript/developer/drivers/analog"><link data-rh="true" rel="alternate" href="https://microsoft.github.io/devicescript/developer/drivers/analog" hreflang="en"><link data-rh="true" rel="alternate" href="https://microsoft.github.io/devicescript/developer/drivers/analog" hreflang="x-default"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.13.24/dist/katex.min.css" integrity="sha384-odtC+0UGzzFL/6PNoE8rX/SPcQDXBJ+uRepguP4QkPCm2LBxH3FA3y+fKSiJ+AmM" crossorigin="anonymous"><link rel="stylesheet" href="/devicescript/assets/css/styles.83f5432f.css">
<link rel="preload" href="/devicescript/assets/js/runtime~main.5c9665ef.js" as="script">
<link rel="preload" href="/devicescript/assets/js/main.2ac68606.js" as="script">
</head>
<body class="navigation-with-keyboard">
<script>!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){var t=null;try{t=new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}return t}()||function(){var t=null;try{t=localStorage.getItem("theme")}catch(t){}return t}();t(null!==e?e:"light")}(),document.documentElement.setAttribute("data-announcement-bar-initially-dismissed",function(){try{return"true"===localStorage.getItem("docusaurus.announcement.dismiss")}catch(t){}return!1}())</script><div id="__docusaurus">
<div role="region" aria-label="Skip to main content"><a class="skipToContent_oPtH" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><div class="announcementBar_zJRd" style="background-color:#fafbfc;color:#091E42" role="banner"><div class="announcementBarPlaceholder_NpUd"></div><div class="content_bSb_ announcementBarContent_t7IR">Experimental Project from Microsoft Research - Join the <a href="https://github.com/microsoft/devicescript/discussions">discussions</a> to provide feedback.</div><button type="button" aria-label="Close" class="clean-btn close closeButton_J5rP announcementBarClose_Jjdj"><svg viewBox="0 0 15 15" width="14" height="14"><g stroke="currentColor" stroke-width="3.1"><path d="M.75.75l13.5 13.5M14.25.75L.75 14.25"></path></g></svg></button></div><nav aria-label="Main" class="navbar navbar--fixed-top navbarHideable_hhpl"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/devicescript/"><div class="navbar__logo"><img src="/devicescript/img/logo.svg" alt="DeviceScript language" class="themedImage_BQGR themedImage--light_HAxW"><img src="/devicescript/img/logo_dark.svg" alt="DeviceScript language" class="themedImage_BQGR themedImage--dark_bGx0"></div><b class="navbar__title text--truncate">DeviceScript</b></a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/devicescript/getting-started">Download</a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/devicescript/intro">Docs</a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/devicescript/devices">Devices</a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/devicescript/api/cli">API</a></div><div class="navbar__items navbar__items--right"><a href="https://github.com/microsoft/devicescript" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link header-github-link" aria-label="GitHub repository"></a><div class="toggle_ki11 colorModeToggle_Hewu"><button class="clean-btn toggleButton_MMFG toggleButtonDisabled_Uw7m" type="button" disabled="" title="Switch between dark and light mode (currently light mode)" aria-label="Switch between dark and light mode (currently light mode)" aria-live="polite"><svg viewBox="0 0 24 24" width="24" height="24" class="lightToggleIcon_lgto"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" class="darkToggleIcon_U96C"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg></button></div><div class="searchBox_WqAV"></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_MB5r docsWrapper_ct1J"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_iEvu" type="button"></button><div class="docPage_KLoz"><aside class="theme-doc-sidebar-container docSidebarContainer_y0RQ"><div class="sidebarViewport_EJ1r"><div class="sidebar_CUen sidebarWithHideableNavbar_w4KB"><a tabindex="-1" class="sidebarLogo_CYvI" href="/devicescript/"><img src="/devicescript/img/logo.svg" alt="DeviceScript language" class="themedImage_BQGR themedImage--light_HAxW"><img src="/devicescript/img/logo_dark.svg" alt="DeviceScript language" class="themedImage_BQGR themedImage--dark_bGx0"><b>DeviceScript</b></a><nav aria-label="Docs sidebar" class="menu thin-scrollbar menu_jmj1 menuWithAnnouncementBar_YufC"><ul class="theme-doc-sidebar-menu menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/devicescript/intro">DeviceScript</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/devicescript/getting-started">Getting Started</a><button aria-label="Toggle the collapsible sidebar category 'Getting Started'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--active" aria-expanded="true" href="/devicescript/developer">Developer</a><button aria-label="Toggle the collapsible sidebar category 'Developer'" type="button" class="clean-btn menu__caret"></button></div><ul style="display:block;overflow:visible;height:auto" class="menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/console">Console output</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/status-light">Status Light</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/clients">Clients</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/board-configuration">Board Configuration</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/register">Register</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/commands">Commands</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--active" aria-expanded="true" tabindex="0" href="/devicescript/developer/drivers">Drivers</a><button aria-label="Toggle the collapsible sidebar category 'Drivers'" type="button" class="clean-btn menu__caret"></button></div><ul style="display:block;overflow:visible;height:auto" class="menu__list"><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-3 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/drivers/digital-io">Digital IO</a><button aria-label="Toggle the collapsible sidebar category 'Digital IO'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link menu__link--active" aria-current="page" tabindex="0" href="/devicescript/developer/drivers/analog">Analog</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/drivers/spi">SPI</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/drivers/i2c">I2C</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/drivers/serial">Serial</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/drivers/add-driver">Add a driver</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/drivers/custom-services">Custom Services</a></li></ul></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/json">JSON</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/observables">Observables</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/settings">Settings and Secrets</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/testing">Testing</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/graphics">Graphics</a><button aria-label="Toggle the collapsible sidebar category 'Graphics'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/jsx">JSX/TSX</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/leds">LEDs</a><button aria-label="Toggle the collapsible sidebar category 'LEDs'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/mcu-temperature">MCU Temperature</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/low-power">Low Power</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/net">Network and Sockets</a><button aria-label="Toggle the collapsible sidebar category 'Network and Sockets'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/packages">Packages</a><button aria-label="Toggle the collapsible sidebar category 'Packages'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/bundle">Bundled firmware</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/simulation">Simulation</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/iot">IoT Platforms</a><button aria-label="Toggle the collapsible sidebar category 'IoT Platforms'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/crypto">Cryptography</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" tabindex="0" href="/devicescript/developer/development-gateway">Development Gateway</a><button aria-label="Toggle the collapsible sidebar category 'Development Gateway'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/devicescript/developer/errors">Errors</a></li></ul></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/devicescript/samples">Samples</a><button aria-label="Toggle the collapsible sidebar category 'Samples'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/devicescript/language">Language Reference</a><button aria-label="Toggle the collapsible sidebar category 'Language Reference'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/devicescript/devices">Devices</a><button aria-label="Toggle the collapsible sidebar category 'Devices'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/devicescript/api/cli">API</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/devicescript/changelog">Release Notes</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/devicescript/contributing">Contributing</a></li></ul></nav><button type="button" title="Collapse sidebar" aria-label="Collapse sidebar" class="button button--secondary button--outline collapseSidebarButton_oTwn"><svg width="20" height="20" aria-hidden="true" class="collapseSidebarButtonIcon_pMEX"><g fill="#7a7a7a"><path d="M9.992 10.023c0 .2-.062.399-.172.547l-4.996 7.492a.982.982 0 01-.828.454H1c-.55 0-1-.453-1-1 0-.2.059-.403.168-.551l4.629-6.942L.168 3.078A.939.939 0 010 2.528c0-.548.45-.997 1-.997h2.996c.352 0 .649.18.828.45L9.82 9.472c.11.148.172.347.172.55zm0 0"></path><path d="M19.98 10.023c0 .2-.058.399-.168.547l-4.996 7.492a.987.987 0 01-.828.454h-3c-.547 0-.996-.453-.996-1 0-.2.059-.403.168-.551l4.625-6.942-4.625-6.945a.939.939 0 01-.168-.55 1 1 0 01.996-.997h3c.348 0 .649.18.828.45l4.996 7.492c.11.148.168.347.168.55zm0 0"></path></g></svg></button></div></div></aside><main class="docMainContainer_sTIZ"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_Qr34"><div class="docItemContainer_tjFy"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_T5ub" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/devicescript/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_sfvy"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/devicescript/developer"><span itemprop="name">Developer</span></a><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/devicescript/developer/drivers"><span itemprop="name">Drivers</span></a><meta itemprop="position" content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Analog</span><meta itemprop="position" content="3"></li></ul></nav><div class="tocCollapsible_wXna theme-doc-toc-mobile tocMobile_Ojys"><button type="button" class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Analog</h1><p>There are a number of functions that start a simple analog sensor server.
We'll use <code>startPotentiometer()</code> as an example, but you can use any of the following,
as they all use the same configuration.</p><ul><li><a href="/devicescript/api/drivers/lightlevel">LightLevel</a></li><li><a href="/devicescript/api/drivers/reflectedlight">ReflectedLight</a></li><li><a href="/devicescript/api/drivers/waterlevel">WaterLevel</a></li><li><a href="/devicescript/api/drivers/soundlevel">SoundLevel</a></li><li><a href="/devicescript/api/drivers/soilmoisture">SoilMoisture</a></li><li><a href="/devicescript/api/drivers/potentiometer">Potentiometer</a></li></ul><p>In the simplest case, you just pass the pin to <code>startPotentiometer()</code>.
The voltage on the pin (typically between 0V (GND) and 3.3V (VCC)) will be translated to a number between 0 and 1.</p><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> gpio </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/core"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> startPotentiometer </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/servers"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> slider </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">startPotentiometer</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> pin</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> ds</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">gpio</span><span class="token punctuation" style="color:#393A34">(</span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">slider</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">reading</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">subscribe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">data</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> value</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">100</span><span class="token plain"> </span><span class="token operator" style="color:#D73A49">*</span><span class="token plain"> v </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="scaling">Scaling<a href="#scaling" class="hash-link" aria-label="Direct link to Scaling" title="Direct link to Scaling"></a></h2><p>There are two settings, <code>offset</code> and <code>scale</code> that let you modify the value read from the sensor.
The actual reported reading is <code>(offset + (raw_reading * scale) / 1024) / 0xffff</code>
clamped to <code>0 ... 1</code> range.
The range of <code>raw_reading</code> is <code>0 ... 0xffff</code>.
The defaults are <code>{ offset: 0, scale: 1024 }</code> so the <code>raw_reading</code> is just reported back.</p><p>For example, if you find you can never quite reach the <code>0</code> and <code>1</code> values, you can try the following:</p><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> gpio </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/core"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> startPotentiometer </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/servers"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> slider </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">startPotentiometer</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> pin</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> ds</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">gpio</span><span class="token punctuation" style="color:#393A34">(</span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> offset</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">0x1000</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> scale</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">900</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="limiting-power-consumption">Limiting power consumption<a href="#limiting-power-consumption" class="hash-link" aria-label="Direct link to Limiting power consumption" title="Direct link to Limiting power consumption"></a></h2><p>A potentiometer typically has 3 terminals, let's call them L, M, R.
You connect L to GND, R to VCC and M (middle) to the sensing pin.
The M terminal will then get a voltage proportional to the position of the knob.</p><p>However, the current (0.3mA with typical 10kOhm potentiometer) will always flow from L to R,
regardless if you measure it or not.
To improve power consumption, you may connect say R to a GPIO and configure the service like this:</p><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> gpio </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/core"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> startPotentiometer </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/servers"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> slider </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">startPotentiometer</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> pin</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> ds</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">gpio</span><span class="token punctuation" style="color:#393A34">(</span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> pinHigh</span><span class="token operator" style="color:#D73A49">:</span><span class="token plain"> ds</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">gpio</span><span class="token punctuation" style="color:#393A34">(</span><span class="token number" style="color:#005CC5">7</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>This tells the driver to set GPIO7 (<code>pinHigh</code>) to 1 (3.3V) before taking the measurement
from GPIO3 (<code>pin</code>).
After taking the measurement, <code>pinHigh</code> will be left floating, so no current will flow through the potentiometer.</p><p>You can also set <code>pinLow</code> (which is set to 0 before taking measurement) or both <code>pinHigh</code> and <code>pinLow</code>,
but typically one is enough.</p><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="timings">Timings<a href="#timings" class="hash-link" aria-label="Direct link to Timings" title="Direct link to Timings"></a></h2><p>The <code>samplingItv</code> settings defaults to 9 milliseconds and specifies how often to sample the sensor.</p><p>The <code>streamingItv</code> setting defaults to 100 milliseconds and specifies how often to stream values
on the Jacdac bus.
The client can override this through <code>streaming_interval</code> Jacdac register.</p><p>Additionally, you can set <code>samplingDelay</code> to a number of milliseconds to wait after setting <code>pinHigh</code>/<code>pinLow</code>
before taking the measurement
(default is 0, so effectively a few microseconds (not milliseconds)).</p></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/devicescript/developer/drivers/digital-io/wire"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Wire</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/devicescript/developer/drivers/spi"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">SPI</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_XG6w thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#scaling" class="table-of-contents__link toc-highlight">Scaling</a></li><li><a href="#limiting-power-consumption" class="table-of-contents__link toc-highlight">Limiting power consumption</a></li><li><a href="#timings" class="table-of-contents__link toc-highlight">Timings</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Docs</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/devicescript/intro">Introduction</a></li><li class="footer__item"><a class="footer__link-item" href="/devicescript/developer">Developer</a></li><li class="footer__item"><a class="footer__link-item" href="/devicescript/language">Language Reference</a></li><li class="footer__item"><a class="footer__link-item" href="/devicescript/api/cli">API</a></li></ul></div><div class="col footer__col"><div class="footer__title">Info</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://github.com/microsoft/devicescript/" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://github.com/microsoft/devicescript/discussions" target="_blank" rel="noopener noreferrer" class="footer__link-item">Discussions<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://go.microsoft.com/fwlink/?linkid=2259814" target="_blank" rel="noopener noreferrer" class="footer__link-item">Consumer Health Privacy<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">Legal</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://go.microsoft.com/fwlink/?LinkId=521839" target="_blank" rel="noopener noreferrer" class="footer__link-item">Privacy & Cookies<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.microsoft.com/en-us/legal/intellectualproperty/copyright" target="_blank" rel="noopener noreferrer" class="footer__link-item">Terms of Use<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general" target="_blank" rel="noopener noreferrer" class="footer__link-item">Trademarks<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPrP"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2024 Microsoft Corporation.</div></div></div></footer></div>
<script src="/devicescript/assets/js/runtime~main.5c9665ef.js"></script>
<script src="/devicescript/assets/js/main.2ac68606.js"></script>
</body>
</html>