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1380 lines
43 KiB
1380 lines
43 KiB
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<meta name="description" content="ESP8266/ESP32 WLAN configuration at run time with web interface">
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<title>Saved credentials access - AutoConnect for ESP8266/ESP32</title>
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<body dir="ltr" data-md-color-primary="indigo" data-md-color-accent="indigo">
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<svg xmlns="http://www.w3.org/2000/svg" width="416" height="448" viewBox="0 0 416 448" id="__github"><path fill="currentColor" d="M160 304q0 10-3.125 20.5t-10.75 19T128 352t-18.125-8.5-10.75-19T96 304t3.125-20.5 10.75-19T128 256t18.125 8.5 10.75 19T160 304zm160 0q0 10-3.125 20.5t-10.75 19T288 352t-18.125-8.5-10.75-19T256 304t3.125-20.5 10.75-19T288 256t18.125 8.5 10.75 19T320 304zm40 0q0-30-17.25-51T296 232q-10.25 0-48.75 5.25Q229.5 240 208 240t-39.25-2.75Q130.75 232 120 232q-29.5 0-46.75 21T56 304q0 22 8 38.375t20.25 25.75 30.5 15 35 7.375 37.25 1.75h42q20.5 0 37.25-1.75t35-7.375 30.5-15 20.25-25.75T360 304zm56-44q0 51.75-15.25 82.75-9.5 19.25-26.375 33.25t-35.25 21.5-42.5 11.875-42.875 5.5T212 416q-19.5 0-35.5-.75t-36.875-3.125-38.125-7.5-34.25-12.875T37 371.5t-21.5-28.75Q0 312 0 260q0-59.25 34-99-6.75-20.5-6.75-42.5 0-29 12.75-54.5 27 0 47.5 9.875t47.25 30.875Q171.5 96 212 96q37 0 70 8 26.25-20.5 46.75-30.25T376 64q12.75 25.5 12.75 54.5 0 21.75-6.75 42 34 40 34 99.5z"/></svg>
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<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
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<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
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<label class="md-overlay" data-md-component="overlay" for="__drawer"></label>
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<a href="#saved-credentials-in-the-flash" tabindex="0" class="md-skip">
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Skip to content
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</a>
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<header class="md-header" data-md-component="header">
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<nav class="md-header-nav md-grid">
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<div class="md-flex">
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<div class="md-flex__cell md-flex__cell--shrink">
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<a href="https://Hieromon.github.io/AutoConnect/" title="AutoConnect for ESP8266/ESP32" aria-label="AutoConnect for ESP8266/ESP32" class="md-header-nav__button md-logo">
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<img alt="logo" src="images/arduino-logo.svg" width="24" height="24">
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</a>
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</div>
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<div class="md-flex__cell md-flex__cell--shrink">
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<label class="md-icon md-icon--menu md-header-nav__button" for="__drawer"></label>
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</div>
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<div class="md-flex__cell md-flex__cell--stretch">
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<div class="md-flex__ellipsis md-header-nav__title" data-md-component="title">
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<span class="md-header-nav__topic">
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AutoConnect for ESP8266/ESP32
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</span>
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<span class="md-header-nav__topic">
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Saved credentials access
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</span>
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</div>
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</div>
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<div class="md-flex__cell md-flex__cell--shrink">
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<label class="md-icon md-icon--search md-header-nav__button" for="__search"></label>
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<div class="md-search" data-md-component="search" role="dialog">
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<label class="md-search__overlay" for="__search"></label>
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<div class="md-search__inner" role="search">
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<form class="md-search__form" name="search">
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<input type="text" class="md-search__input" aria-label="search" name="query" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query" data-md-state="active">
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<label class="md-icon md-search__icon" for="__search"></label>
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<button type="reset" class="md-icon md-search__icon" data-md-component="reset" tabindex="-1">
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
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</button>
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</form>
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<div class="md-search__output">
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<div class="md-search__scrollwrap" data-md-scrollfix>
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<div class="md-search-result" data-md-component="result">
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<div class="md-search-result__meta">
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Type to start searching
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</div>
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<ol class="md-search-result__list"></ol>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="md-flex__cell md-flex__cell--shrink">
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<div class="md-header-nav__source">
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<a href="https://github.com/Hieromon/AutoConnect" title="Go to repository" class="md-source" data-md-source="github">
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<div class="md-source__icon">
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<svg viewBox="0 0 24 24" width="24" height="24">
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<use xlink:href="#__github" width="24" height="24"></use>
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</svg>
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</div>
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<div class="md-source__repository">
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Hieromon/AutoConnect
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</div>
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</a>
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</div>
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</div>
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</div>
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</nav>
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</header>
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<div class="md-container">
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<main class="md-main" role="main">
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<div class="md-main__inner md-grid" data-md-component="container">
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<div class="md-sidebar md-sidebar--primary" data-md-component="navigation">
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<div class="md-sidebar__scrollwrap">
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<div class="md-sidebar__inner">
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<nav class="md-nav md-nav--primary" data-md-level="0">
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<label class="md-nav__title md-nav__title--site" for="__drawer">
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<a href="https://Hieromon.github.io/AutoConnect/" title="AutoConnect for ESP8266/ESP32" class="md-nav__button md-logo">
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<img alt="logo" src="images/arduino-logo.svg" width="48" height="48">
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</a>
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AutoConnect for ESP8266/ESP32
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</label>
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<div class="md-nav__source">
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<a href="https://github.com/Hieromon/AutoConnect" title="Go to repository" class="md-source" data-md-source="github">
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<div class="md-source__icon">
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<svg viewBox="0 0 24 24" width="24" height="24">
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<use xlink:href="#__github" width="24" height="24"></use>
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</svg>
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</div>
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<div class="md-source__repository">
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Hieromon/AutoConnect
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</div>
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</a>
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</div>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="index.html" title="Overview" class="md-nav__link">
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Overview
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</a>
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</li>
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<li class="md-nav__item">
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<a href="gettingstarted.html" title="Getting started" class="md-nav__link">
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Getting started
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</a>
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</li>
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<li class="md-nav__item">
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<a href="menu.html" title="AutoConnect menu" class="md-nav__link">
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AutoConnect menu
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</a>
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</li>
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<li class="md-nav__item">
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<a href="basicusage.html" title="Basic usage" class="md-nav__link">
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Basic usage
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</a>
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</li>
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<li class="md-nav__item">
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<a href="advancedusage.html" title="Advanced usage" class="md-nav__link">
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Advanced usage
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</a>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-6" type="checkbox" id="nav-6">
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<label class="md-nav__link" for="nav-6">
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Custom Web pages
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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<label class="md-nav__title" for="nav-6">
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Custom Web pages
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="acintro.html" title="Custom Web pages with AutoConnect" class="md-nav__link">
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Custom Web pages with AutoConnect
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</a>
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</li>
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<li class="md-nav__item">
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<a href="acelements.html" title="AutoConnectElements" class="md-nav__link">
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AutoConnectElements
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</a>
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</li>
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<li class="md-nav__item">
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<a href="acjson.html" title="Custom Web pages with JSON" class="md-nav__link">
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Custom Web pages with JSON
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</a>
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</li>
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<li class="md-nav__item">
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<a href="achandling.html" title="Handling the custom Web pages" class="md-nav__link">
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Handling the custom Web pages
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-7" type="checkbox" id="nav-7">
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<label class="md-nav__link" for="nav-7">
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OTA Updates
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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<label class="md-nav__title" for="nav-7">
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OTA Updates
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="otaupdate.html" title="OTA Updates" class="md-nav__link">
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OTA Updates
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</a>
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</li>
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<li class="md-nav__item">
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<a href="otabrowser.html" title="Using Web Browser" class="md-nav__link">
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Using Web Browser
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</a>
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</li>
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<li class="md-nav__item">
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<a href="otaserver.html" title="Using Update Server" class="md-nav__link">
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Using Update Server
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-8" type="checkbox" id="nav-8">
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<label class="md-nav__link" for="nav-8">
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Library APIs
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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<label class="md-nav__title" for="nav-8">
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Library APIs
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="api.html" title="AutoConnect API" class="md-nav__link">
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AutoConnect API
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</a>
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</li>
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<li class="md-nav__item">
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<a href="apiaux.html" title="AutoConnectAux API" class="md-nav__link">
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AutoConnectAux API
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</a>
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</li>
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<li class="md-nav__item">
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<a href="apiconfig.html" title="AutoConnectConfig API" class="md-nav__link">
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AutoConnectConfig API
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</a>
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</li>
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<li class="md-nav__item">
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<a href="apielements.html" title="AutoConnectElements API" class="md-nav__link">
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AutoConnectElements API
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</a>
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</li>
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<li class="md-nav__item">
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<a href="apiupdate.html" title="AutoConnectUpdate API" class="md-nav__link">
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AutoConnectUpdate API
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</a>
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</li>
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<li class="md-nav__item">
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<a href="apiextra.html" title="Something extra" class="md-nav__link">
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Something extra
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-9" type="checkbox" id="nav-9">
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<label class="md-nav__link" for="nav-9">
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Examples
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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<label class="md-nav__title" for="nav-9">
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Examples
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="howtoembed.html" title="How to embed" class="md-nav__link">
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How to embed
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</a>
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</li>
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Saved credentials access
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Saved credentials access
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Credentials storage location
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AutoConnectCredential
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<article class="md-content__inner md-typeset">
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<h1>Saved credentials access</h1>
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<h2 id="saved-credentials-in-the-flash">Saved credentials in the flash<a class="headerlink" href="#saved-credentials-in-the-flash" title="Permanent link">¶</a></h2>
|
|
<p>AutoConnect stores the established WiFi connection in the flash memory of the ESP8266/ESP32 module and equips the class to access the credentials from the sketch. You can read, write or erase the credentials using this class individually. It's <a href="#autoconnectcredential"><strong>AutoConnectCredential</strong></a> class which provides the access method to the saved credentials in the flash.<sup id="fnref:1"><a class="footnote-ref" href="#fn:1">1</a></sup></p>
|
|
<h2 id="credentials-storage-location">Credentials storage location<a class="headerlink" href="#credentials-storage-location" title="Permanent link">¶</a></h2>
|
|
<p>The location where AutoConnect saves credentials depends on the module type and the AutoConnect library version, also arduino-esp32 core version. In either case, the location is flash memory, but EEPROM and Preferences (in the nvs<sup id="fnref:2"><a class="footnote-ref" href="#fn:2">2</a></sup>) are used depending on the library versions.</p>
|
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<table>
|
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<tr>
|
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<th rowspan="2" style="vertical-align:bottom">AutoConnect</th>
|
|
<th rowspan="2" style="vertical-align:bottom">Arduino core<br>for ESP8266</th>
|
|
<th colspan="2" style="text-align:center;vertical-align:bottom">Arduino core for ESP32</th>
|
|
</tr>
|
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<tr>
|
|
<th style="text-align:center;vertical-align:bottom">1.0.2 earlier</td>
|
|
<th style="text-align:center;vertical-align:bottom">1.0.3 later</td>
|
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</tr>
|
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<tr>
|
|
<td>v0.9.12 earlier</td>
|
|
<td rowspan="2" style="text-align:center;vertical-align:middle">EEPROM</td>
|
|
<td>EEPROM (partition)</td>
|
|
<td>Not supported</td>
|
|
</tr>
|
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<tr>
|
|
<td>v1.0.0 later</td>
|
|
<td>Preferences (nvs)<p>(Can be used EEPROM with turning off AUTOCONNECT_USE_PREFERENCES macro)</p></td>
|
|
<td>Preferences (nvs)</td>
|
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</tr>
|
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</table>
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<p>However, sketches do not need to know where to store credentials using the commonly accessible <a href="#AutoConnectCredential">AutoConnectCredential</a> API.</p>
|
|
<p>If you are using an Arduino core for ESP32 1.0.2 earlier and need to use credentials in EEPROM for backward compatibility, turns off the <strong>AUTOCONNECT_USE_PREFERENCES</strong><sup id="fnref:3"><a class="footnote-ref" href="#fn:3">3</a></sup> macro definition in <code>AutoConnectCredentials.h</code> file. AutoConnect behaves assuming that credentials are stored in EEPROM if <code>AUTOCONNECT_USE_PREFERENCES</code> is not defined.</p>
|
|
<h2 id="autoconnectcredential">AutoConnectCredential<a class="headerlink" href="#autoconnectcredential" title="Permanent link">¶</a></h2>
|
|
<h3 id="include-header"><i class="fa fa-code"></i> Include header<a class="headerlink" href="#include-header" title="Permanent link">¶</a></h3>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #75715e">#include</span> <span style="color: #75715e"><AutoConnectCredential.h></span>
|
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</code></pre></div>
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|
|
|
<h3 id="constructors"><i class="fa fa-code"></i> Constructors<a class="headerlink" href="#constructors" title="Permanent link">¶</a></h3>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #f8f8f2">AutoConnectCredential();</span>
|
|
</code></pre></div>
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|
|
|
<p>AutoConnectCredential default constructor. The default offset value is 0. In ESP8266 or ESP32 with arduino core 1.0.2 earlier, if the offset value is 0, the credential area starts from the top of the EEPROM. If you use this area in a user sketch, AutoConnect may overwrite that data.</p>
|
|
<p><div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #f8f8f2">AutoConnectCredential(</span><span style="color: #66d9ef">uint16_t</span> <span style="color: #f8f8f2">offset);</span>
|
|
</code></pre></div>
|
|
<dl class="apidl">
|
|
<dt><strong>Parameter</strong></dt>
|
|
<dd><span class="apidef">offset</span><span class="apidesc">Species offset from the top of the EEPROM for the credential area together. The offset value is from 0 to the flash sector size. This parameter is ignored for AutoConnect v1.0.0 or later with arduino-esp32 core 1.0.3 or later.</span></dd>
|
|
</dl></p>
|
|
<h3 id="public-member-functions"><i class="fa fa-code"></i> Public member functions<a class="headerlink" href="#public-member-functions" title="Permanent link">¶</a></h3>
|
|
<h4 id="entries"><i class="fa fa-caret-right"></i> entries<a class="headerlink" href="#entries" title="Permanent link">¶</a></h4>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">entries(</span><span style="color: #66d9ef">void</span><span style="color: #f8f8f2">)</span>
|
|
</code></pre></div>
|
|
|
|
<p>Returns number of entries as contained credentials.
|
|
<dl class="apidl">
|
|
<dt><strong>Return value</strong></dt>
|
|
<dd>Number of entries as contained credentials.</dd>
|
|
</dl></p>
|
|
<h4 id="load"><i class="fa fa-caret-right"></i> load<a class="headerlink" href="#load" title="Permanent link">¶</a></h4>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">int8_t</span> <span style="color: #f8f8f2">load(</span><span style="color: #66d9ef">const</span> <span style="color: #66d9ef">char</span><span style="color: #f92672">*</span> <span style="color: #f8f8f2">ssid,</span> <span style="color: #f8f8f2">station_config_t</span><span style="color: #f92672">*</span> <span style="color: #f8f8f2">config)</span>
|
|
</code></pre></div>
|
|
|
|
<p>Load a credential entry and store to <strong>config</strong>.
|
|
<dl class="apidl">
|
|
<dt><strong>Parameters</strong></dt>
|
|
<dd><span class="apidef">ssid</span><span class="apidesc">SSID to be loaded.</span></dd>
|
|
<dd><span class="apidef">config</span><span class="apidesc">station_config_t</span></dd>
|
|
<dt><strong>Return value</strong></dt>
|
|
<dd>Save the specified SSID's credential entry to station_config_t pointed to by the parameter as <strong>config</strong>. -1 is returned if the SSID is not saved. </dd>
|
|
</dl></p>
|
|
<h4 id="load_1"><i class="fa fa-caret-right"></i> load<a class="headerlink" href="#load_1" title="Permanent link">¶</a></h4>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">bool</span> <span style="color: #f8f8f2">load(</span><span style="color: #66d9ef">int8_t</span> <span style="color: #f8f8f2">entry,</span> <span style="color: #f8f8f2">station_config_t</span><span style="color: #f92672">*</span> <span style="color: #f8f8f2">config)</span>
|
|
</code></pre></div>
|
|
|
|
<p>Load a credential entry and store to <strong>config</strong>.
|
|
<dl class="apidl">
|
|
<dt><strong>Parameters</strong></dt>
|
|
<dd><span class="apidef">entry</span><span class="apidesc">Specifies the index number based 0 to be loaded.</span></dd>
|
|
<dd><span class="apidef">config</span><span class="apidesc">station_config_t</span></dd>
|
|
<dt><strong>Return value</strong></dt>
|
|
<dd>Save the specified credential entry to station_config_t pointed to by the parameter as <strong>config</strong>. -1 is returned if specified number is not saved. </dd>
|
|
</dl></p>
|
|
<h4 id="save"><i class="fa fa-caret-right"></i> save<a class="headerlink" href="#save" title="Permanent link">¶</a></h4>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">bool</span> <span style="color: #f8f8f2">save(</span><span style="color: #66d9ef">const</span> <span style="color: #f8f8f2">station_config_t</span><span style="color: #f92672">*</span> <span style="color: #f8f8f2">config)</span>
|
|
</code></pre></div>
|
|
|
|
<p>Save a credential entry.
|
|
<dl class="apidl">
|
|
<dt><strong>Parameter</strong></dt>
|
|
<dd><span class="apidef">config</span><span class="apidesc">station_config_t to be saved.</span></dd>
|
|
<dt><strong>Return value</strong></dt>
|
|
<dd><span class="apidef">true</span><span class="apidesc">Successfully saved.</span></dd>
|
|
<dd><span class="apidef">false</span><span class="apidesc">Failed to save.</span></dd>
|
|
</dl></p>
|
|
<h4 id="del"><i class="fa fa-caret-right"></i> del<a class="headerlink" href="#del" title="Permanent link">¶</a></h4>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">bool</span> <span style="color: #f8f8f2">del(</span><span style="color: #66d9ef">const</span> <span style="color: #66d9ef">char</span><span style="color: #f92672">*</span> <span style="color: #f8f8f2">ssid)</span>
|
|
</code></pre></div>
|
|
|
|
<p>Delete a credential the specified SSID.
|
|
<dl class="apidl">
|
|
<dt><strong>Parameter</strong></dt>
|
|
<dd><span class="apidef">ssid</span><span class="apidesc">SSID to be deleted.</span></dd>
|
|
<dt><strong>Return value</strong></dt>
|
|
<dd><span class="apidef">true</span><span class="apidesc">Successfully deleted.</span></dd>
|
|
<dd><span class="apidef">false</span><span class="apidesc">Failed to delete.</span></dd>
|
|
</dl></p>
|
|
<div class="admonition example">
|
|
<p class="admonition-title">Clear saved credentials</p>
|
|
<p>There is no particular API for batch clearing of all credential data stored by AutoConnect. It is necessary to prepare a sketch function that combines several AutoConnectCredential APIs to erase all saved credentials.
|
|
The following function is an implementation example, and you can use it to achieve batch clearing.
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">void</span> <span style="color: #a6e22e">deleteAllCredentials</span><span style="color: #f8f8f2">(</span><span style="color: #66d9ef">void</span><span style="color: #f8f8f2">)</span> <span style="color: #f8f8f2">{</span>
|
|
<span style="color: #f8f8f2">AutoConnectCredential</span> <span style="color: #f8f8f2">credential;</span>
|
|
<span style="color: #f8f8f2">station_config_t</span> <span style="color: #f8f8f2">config;</span>
|
|
<span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">ent</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">credential.entries();</span>
|
|
|
|
<span style="color: #66d9ef">while</span> <span style="color: #f8f8f2">(ent</span><span style="color: #f92672">--</span><span style="color: #f8f8f2">)</span> <span style="color: #f8f8f2">{</span>
|
|
<span style="color: #f8f8f2">credential.load(</span><span style="color: #ae81ff">0</span><span style="color: #f8f8f2">,</span> <span style="color: #f92672">&</span><span style="color: #f8f8f2">config);</span>
|
|
<span style="color: #f8f8f2">credential.del((</span><span style="color: #66d9ef">const</span> <span style="color: #66d9ef">char</span><span style="color: #f92672">*</span><span style="color: #f8f8f2">)</span><span style="color: #f92672">&</span><span style="color: #f8f8f2">config.ssid[</span><span style="color: #ae81ff">0</span><span style="color: #f8f8f2">]);</span>
|
|
<span style="color: #f8f8f2">}</span>
|
|
<span style="color: #f8f8f2">}</span>
|
|
</code></pre></div></p>
|
|
</div>
|
|
<h2 id="the-data-structures">The data structures<a class="headerlink" href="#the-data-structures" title="Permanent link">¶</a></h2>
|
|
<h3 id="station_config_t"><i class="fa fa-code"></i> station_config_t<a class="headerlink" href="#station_config_t" title="Permanent link">¶</a></h3>
|
|
<p>The saved credential structure is defined as stato_config_t in the AcutoConnectCredential header file.</p>
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #66d9ef">typedef</span> <span style="color: #66d9ef">struct</span> <span style="color: #f8f8f2">{</span>
|
|
<span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">ssid[</span><span style="color: #ae81ff">32</span><span style="color: #f8f8f2">];</span>
|
|
<span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">password[</span><span style="color: #ae81ff">64</span><span style="color: #f8f8f2">];</span>
|
|
<span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">bssid[</span><span style="color: #ae81ff">6</span><span style="color: #f8f8f2">];</span>
|
|
<span style="color: #66d9ef">uint8_t</span> <span style="color: #f8f8f2">dhcp;</span> <span style="color: #75715e">/**< 0:DHCP, 1:Static IP */</span>
|
|
<span style="color: #66d9ef">union</span> <span style="color: #f8f8f2">_config</span> <span style="color: #f8f8f2">{</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">addr[</span><span style="color: #ae81ff">5</span><span style="color: #f8f8f2">];</span>
|
|
<span style="color: #66d9ef">struct</span> <span style="color: #f8f8f2">_sta</span> <span style="color: #f8f8f2">{</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">ip;</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">gateway;</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">netmask;</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">dns1;</span>
|
|
<span style="color: #66d9ef">uint32_t</span> <span style="color: #f8f8f2">dns2;</span>
|
|
<span style="color: #f8f8f2">}</span> <span style="color: #f8f8f2">sta;</span>
|
|
<span style="color: #f8f8f2">}</span> <span style="color: #f8f8f2">config;</span>
|
|
<span style="color: #f8f8f2">}</span> <span style="color: #f8f8f2">station_config_t;</span>
|
|
</code></pre></div>
|
|
|
|
<div class="admonition note">
|
|
<p class="admonition-title">The byte size of station_config_t in program memory and stored credentials is different</p>
|
|
<p>There is a gap byte for boundary alignment between the <code>dhcp</code> member and the static IP members of the above station_config_t. Its gap byte will be removed with saved credentials on the flash.</p>
|
|
</div>
|
|
<h3 id="the-credential-entry"><i class="fa fa-code"></i> The credential entry<a class="headerlink" href="#the-credential-entry" title="Permanent link">¶</a></h3>
|
|
<p>A data structure of the credential saving area in EEPROM as the below. <sup id="fnref:4"><a class="footnote-ref" href="#fn:4">4</a></sup></p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>byte offset</th>
|
|
<th>Length</th>
|
|
<th>Value</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>0</td>
|
|
<td>8</td>
|
|
<td>AC_CREDT</td>
|
|
</tr>
|
|
<tr>
|
|
<td>8</td>
|
|
<td>1</td>
|
|
<td>Number of contained entries (uint8_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>9</td>
|
|
<td>2</td>
|
|
<td>Container size, excluding size of AC_CREDT and size of the number of entries(width for uint16_t type).</td>
|
|
</tr>
|
|
<tr>
|
|
<td>11</td>
|
|
<td>variable</td>
|
|
<td>SSID terminated by 0x00. Max length is 32 bytes.</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable</td>
|
|
<td>variable</td>
|
|
<td>Password plain text terminated by 0x00. Max length is 64 bytes.</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable</td>
|
|
<td>6</td>
|
|
<td>BSSID</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable</td>
|
|
<td>1</td>
|
|
<td>Flag for DHCP or Static IP (0:DHCP, 1:Static IP)</td>
|
|
</tr>
|
|
<tr>
|
|
<td><td colspan=3>The following IP address entries are stored only for static IPs.</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable(1)</td>
|
|
<td>4</td>
|
|
<td>Station IP address (uint32_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable(5)</td>
|
|
<td>4</td>
|
|
<td>Gateway address (uint32_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable(9)</td>
|
|
<td>4</td>
|
|
<td>Netmask (uint32_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable(13)</td>
|
|
<td>4</td>
|
|
<td>Primary DNS address (uint32_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable(17)</td>
|
|
<td>4</td>
|
|
<td>Secondary DNS address (uint32_t)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable</td>
|
|
<td>variable</td>
|
|
<td>Contained the next entries. (Continuation SSID+Password+BSSID+DHCP flag+Static IPs(if exists))</td>
|
|
</tr>
|
|
<tr>
|
|
<td>variable</td>
|
|
<td>1</td>
|
|
<td>0x00. End of container.</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<div class="admonition note">
|
|
<p class="admonition-title">AutoConnectCredential has changed</p>
|
|
<p>It was lost AutoConnectCredential backward compatibility. Credentials saved by AutoConnect v1.0.3 (or earlier) will not work properly with AutoConnect v1.1.0. You need to erase the flash of the ESP module using the esptool before the sketch uploading.
|
|
<div class="codehilite" style="background: #272822"><pre style="line-height: 125%"><span></span><code><span style="color: #f8f8f2">esptool</span> <span style="color: #f8f8f2">-c</span> <span style="color: #f8f8f2">esp8266</span> <span style="color: #f8f8f2">(or</span> <span style="color: #f8f8f2">esp32)</span> <span style="color: #f8f8f2">-p</span> <span style="color: #66d9ef">[COM_PORT]</span> <span style="color: #f8f8f2">erase_flash</span>
|
|
</code></pre></div></p>
|
|
</div>
|
|
<div class="footnote">
|
|
<hr />
|
|
<ol>
|
|
<li id="fn:1">
|
|
<p>An example using AutoConnectCredential is provided as <a href="https://github.com/Hieromon/AutoConnect/blob/master/examples/Credential/Credential.ino">an example</a> of a library sketch to delete saved credentials. <a class="footnote-backref" href="#fnref:1" title="Jump back to footnote 1 in the text">↩</a></p>
|
|
</li>
|
|
<li id="fn:2">
|
|
<p>The namespace for Preferences used by AutoConnect is <strong>AC_CREDT</strong>. <a class="footnote-backref" href="#fnref:2" title="Jump back to footnote 2 in the text">↩</a></p>
|
|
</li>
|
|
<li id="fn:3">
|
|
<p>Available only for AutoConnect v1.0.0 and later. <a class="footnote-backref" href="#fnref:3" title="Jump back to footnote 3 in the text">↩</a></p>
|
|
</li>
|
|
<li id="fn:4">
|
|
<p>There may be 0xff as an invalid data in the credential saving area. The 0xff area would be reused. <a class="footnote-backref" href="#fnref:4" title="Jump back to footnote 4 in the text">↩</a></p>
|
|
</li>
|
|
</ol>
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