<labelclass="md-nav__title"for="toc">Table of contents</label>
<ulclass="md-nav__list"data-md-scrollfix>
<liclass="md-nav__item">
<ahref="#after-connected-autoconnect-menu-performs-but-no-happens"title=" After connected, AutoConnect menu performs but no happens."class="md-nav__link">
After connected, AutoConnect menu performs but no happens.
</a>
</li>
<liclass="md-nav__item">
<ahref="#an-esp8266ap-as-softap-was-connected-but-captive-portal-does-not-start"title=" An esp8266ap as SoftAP was connected but Captive portal does not start."class="md-nav__link">
An esp8266ap as SoftAP was connected but Captive portal does not start.
</a>
</li>
<liclass="md-nav__item">
<ahref="#does-not-appear-esp8266ap-in-smartphone"title=" Does not appear esp8266ap in smartphone."class="md-nav__link">
Does not appear esp8266ap in smartphone.
</a>
</li>
<liclass="md-nav__item">
<ahref="#does-not-response-from-95ac"title=" Does not response from _ac."class="md-nav__link">
Does not response from _ac.
</a>
</li>
<liclass="md-nav__item">
<ahref="#how-change-esp8266ap-for-ssid-name-in-captive-portal"title=" How change esp8266ap for SSID name in Captive portal?"class="md-nav__link">
How change esp8266ap for SSID name in Captive portal?
</a>
</li>
<liclass="md-nav__item">
<ahref="#hang-up-after-reset"title=" Hang up after Reset?"class="md-nav__link">
Hang up after Reset?
</a>
</li>
<liclass="md-nav__item">
<ahref="#how-erase-the-credentials-saved-in-eeprom"title=" How erase the credentials saved in EEPROM?"class="md-nav__link">
<labelclass="md-nav__title"for="toc">Table of contents</label>
<ulclass="md-nav__list"data-md-scrollfix>
<liclass="md-nav__item">
<ahref="#after-connected-autoconnect-menu-performs-but-no-happens"title=" After connected, AutoConnect menu performs but no happens."class="md-nav__link">
After connected, AutoConnect menu performs but no happens.
</a>
</li>
<liclass="md-nav__item">
<ahref="#an-esp8266ap-as-softap-was-connected-but-captive-portal-does-not-start"title=" An esp8266ap as SoftAP was connected but Captive portal does not start."class="md-nav__link">
An esp8266ap as SoftAP was connected but Captive portal does not start.
</a>
</li>
<liclass="md-nav__item">
<ahref="#does-not-appear-esp8266ap-in-smartphone"title=" Does not appear esp8266ap in smartphone."class="md-nav__link">
Does not appear esp8266ap in smartphone.
</a>
</li>
<liclass="md-nav__item">
<ahref="#does-not-response-from-95ac"title=" Does not response from _ac."class="md-nav__link">
Does not response from _ac.
</a>
</li>
<liclass="md-nav__item">
<ahref="#how-change-esp8266ap-for-ssid-name-in-captive-portal"title=" How change esp8266ap for SSID name in Captive portal?"class="md-nav__link">
How change esp8266ap for SSID name in Captive portal?
</a>
</li>
<liclass="md-nav__item">
<ahref="#hang-up-after-reset"title=" Hang up after Reset?"class="md-nav__link">
Hang up after Reset?
</a>
</li>
<liclass="md-nav__item">
<ahref="#how-erase-the-credentials-saved-in-eeprom"title=" How erase the credentials saved in EEPROM?"class="md-nav__link">
<ahref="#i-cannot-complete-to-wi-fi-login-from-smartphone"title=" I cannot complete to Wi-Fi login from smartphone."class="md-nav__link">
I cannot complete to Wi-Fi login from smartphone.
</a>
</li>
</ul>
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</div>
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<divclass="md-content">
<articleclass="md-content__inner md-typeset">
<h1>FAQ</h1>
<h2id="after-connected-autoconnect-menu-performs-but-no-happens"><iclass="fa fa-question-circle"></i> After connected, AutoConnect menu performs but no happens.<aclass="headerlink"href="#after-connected-autoconnect-menu-performs-but-no-happens"title="Permanent link">¶</a></h2>
<p>If you can access the <strong>AutoConnect root path</strong> as http://ESP8266IPADDRESS/_ac from browser, probably the sketch uses <em>ESP8266WebServer::handleClient()</em> without <em>AutoConnect::handleRequest()</em>.<br/>
For AutoConnect menus to work properly, call <em>AutoConnect::handleRequest()</em> after <em>ESP8266WebServer::handleClient()</em> invoked, or use <em>AutoConnect::handleClient()</em>. <em>AutoConnect::handleClient()</em> is equivalent <em>ESP8266WebServer::handleClient</em> combinated <em>AutoConnect::handleRequest()</em>.</p>
<h2id="an-esp8266ap-as-softap-was-connected-but-captive-portal-does-not-start"><iclass="fa fa-question-circle"></i> An esp8266ap as SoftAP was connected but Captive portal does not start.<aclass="headerlink"href="#an-esp8266ap-as-softap-was-connected-but-captive-portal-does-not-start"title="Permanent link">¶</a></h2>
<p>Captive portal detection could not be trapped. It is necessary to disconnect and reset ESP8266 to clear memorized connection data in ESP8266. Also, It may be displayed on the smartphone if the connection information of esp8266ap is wrong. In that case, delete the connection information of esp8266ap memorized by the smartphone once.</p>
<h2id="does-not-appear-esp8266ap-in-smartphone"><iclass="fa fa-question-circle"></i> Does not appear esp8266ap in smartphone.<aclass="headerlink"href="#does-not-appear-esp8266ap-in-smartphone"title="Permanent link">¶</a></h2>
<p>Maybe it is successfully connected at the <strong>first WiFi.begin</strong>. ESP8266 remembers the SSID successfully connected and will use at the next. It means SoftAP will only start up when the first <em>WiFi.begin()</em> fails.</p>
<p>The saved SSID would be cleared by <em>WiFi.disconnect()</em> with WIFI_STA mode. If you do not want automatic reconnection, you can erase the memorized SSID with the following simple sketch.</p>
<detailsclass="hint"><summary>You can interactively check the WiFi state of ESP8266.</summary><p>Please try <ahref="https://github.com/Hieromon/ESPShaker"><strong>ESPShaker</strong></a>. It is ESP8266 interactive serial command processor.</p><p><imgsrc="../images/espshaker.gif"/></p></details><h2id="does-not-response-from-95ac"><iclass="fa fa-question-circle"></i> Does not response from _ac.<aclass="headerlink"href="#does-not-response-from-95ac"title="Permanent link">¶</a></h2>
<p>Probably <strong>WiFi.begin</strong> failed with the specified SSID. Activating the <ahref="../advancedusage/index.html#debug-print">debug printing</a> will help you to track down the cause.</p>
<h2id="how-change-esp8266ap-for-ssid-name-in-captive-portal"><iclass="fa fa-question-circle"></i> How change esp8266ap for SSID name in Captive portal?<aclass="headerlink"href="#how-change-esp8266ap-for-ssid-name-in-captive-portal"title="Permanent link">¶</a></h2>
<p>An <strong>esp8266</strong> is default SSID name for SoftAP of captive portal and password is <strong>12345678</strong>. You can change both by using <ahref="../api/index.html#string-apid">AutoConnectConfig</a>.</p>
<h2id="hang-up-after-reset"><iclass="fa fa-question-circle"></i> Hang up after Reset?<aclass="headerlink"href="#hang-up-after-reset"title="Permanent link">¶</a></h2>
<p>If ESP8266 hang up after reset by AutoConnect menu, perhaps manual reset is not yet. Especially if it is not manual reset yet after uploading the sketch, the boot mode will stay 'Uart Download'. There is some discussion about this on the Github's ESP8266 core: <ahref="https://github.com/esp8266/Arduino/issues/1017">https://github.com/esp8266/Arduino/issues/1017</a></p>
<p>If you received the following message, the boot mode is still sketch uploaded. It needs to the manual reset once.</p>
<divclass="codehilite"><pre><span></span>ets Jan 8 2013,rst cause:2, boot mode:(1,6) or (1,7)
ets Jan 8 2013,rst cause:4, boot mode:(1,6) or (1,7)
wdt reset
</pre></div>
<p>The correct boot mode for starting the sketch is <strong>(3, x)</strong>.</p>
<h2id="how-erase-the-credentials-saved-in-eeprom"><iclass="fa fa-question-circle"></i> How erase the credentials saved in EEPROM?<aclass="headerlink"href="#how-erase-the-credentials-saved-in-eeprom"title="Permanent link">¶</a></h2>
<p>Make some sketches for erasing the EEPROM area, or some erasing utility is needed. You can prepare the sketch to erase the saved credential with <em>AutoConnectCredential</em>. The <em>AutoConnectCrendential</em> class provides the access method to the saved credential in EEPROM and library source file is including it.</p>
A data structure of the credential saving area in EEPROM as the below. <supid="fnref:1"><aclass="footnote-ref"href="#fn:1"rel="footnote">1</a></sup></li>
</ul>
<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></td>
<td>Contained the next entries. (Continuation SSID+Password+BSSID)</td>
</tr>
<tr>
<td>variable</td>
<td>1</td>
<td>0x00. End of container.</td>
</tr>
</tbody>
</table>
<divclass="admonition hint">
<pclass="admonition-title">Hint</p>
<p>With the <ahref="https://github.com/Hieromon/ESPShaker"><strong>ESPShaker</strong></a>, you can access EEPROM interactively from the serial monitor, and of course you can erase saved credentials.</p>
</div>
<h2id="how-locate-the-link-button-to-the-autoconnect-menu"><iclass="fa fa-question-circle"></i> How locate the link button to the AutoConnect menu?<aclass="headerlink"href="#how-locate-the-link-button-to-the-autoconnect-menu"title="Permanent link">¶</a></h2>
<p>Link button to AutoConnect menu can be embedded into Sketch's web page. The root path of the menu is <strong>/_ac</strong> by default and embed the following <codeclass="codehilite"><spanclass="nt"><a></a></span></code> tag in the generating HTML.</p>
<h2id="how-much-memory-consumption-is-autoconnect"><iclass="fa fa-question-circle"></i> How much memory consumption is AutoConnect?<aclass="headerlink"href="#how-much-memory-consumption-is-autoconnect"title="Permanent link">¶</a></h2>
<p>It increases about 53K bytes compared to the case without AutoConnect. A sketch size of the most simple example introduced at the Getting started is about 330K bytes. (270K byte without AutoConnect)</p>
<p>It consumes about 2K bytes in the static and about 12K bytes are consumed at the moment when menu executed.</p>
<h2id="i-cannot-complete-to-wi-fi-login-from-smartphone"><iclass="fa fa-question-circle"></i> I cannot complete to Wi-Fi login from smartphone.<aclass="headerlink"href="#i-cannot-complete-to-wi-fi-login-from-smartphone"title="Permanent link">¶</a></h2>
<p>Because AutoConnect does not send a login success response to the captive portal requests from the smartphone. The login success response varies iOS, Android and Windows. By analyzing the request URL of different login success inquiries for each OS, the correct behavior can be implemented, but not yet. Please resets ESP8266 from the AutoConnect menu.</p>
<divclass="footnote">
<hr/>
<ol>
<liid="fn:1">
<p>There may be 0xff as an invalid data in the credential saving area. The 0xff area would be reused. <aclass="footnote-backref"href="#fnref:1"rev="footnote"title="Jump back to footnote 1 in the text">↩</a></p>
