diff --git a/src/AutoConnect.cpp b/src/AutoConnect.cpp
index e65b850..ff597b2 100644
--- a/src/AutoConnect.cpp
+++ b/src/AutoConnect.cpp
@@ -602,7 +602,6 @@ String AutoConnect::_induceConnect(PageArgument& args) {
     // Read from EEPROM
     AutoConnectCredential credential(_apConfig.boundaryOffset);
     struct station_config entry;
-//    AC_DBG("Load credential:%s\n", args.arg(AUTOCONNECT_PARAMID_CRED).c_str());
     credential.load(args.arg(AUTOCONNECT_PARAMID_CRED).c_str(), &entry);
     strncpy(reinterpret_cast<char*>(_credential.ssid), reinterpret_cast<const char*>(entry.ssid), sizeof(_credential.ssid));
     strncpy(reinterpret_cast<char*>(_credential.password), reinterpret_cast<const char*>(entry.password), sizeof(_credential.password));
diff --git a/src/AutoConnect.h b/src/AutoConnect.h
index f6b568b..2e66135 100644
--- a/src/AutoConnect.h
+++ b/src/AutoConnect.h
@@ -231,6 +231,7 @@ class AutoConnect {
 
   /** Extended pages made up with AutoConnectAux */
   std::unique_ptr<AutoConnectAux> _aux;
+  String  _auxLastUri;
 
   /** Saved configurations */
   AutoConnectConfig     _apConfig;
diff --git a/src/AutoConnectAux.cpp b/src/AutoConnectAux.cpp
index 96ca874..ba35df0 100644
--- a/src/AutoConnectAux.cpp
+++ b/src/AutoConnectAux.cpp
@@ -51,6 +51,11 @@ const char AutoConnectAux::_PAGE_AUX[] PROGMEM = {
   "</div>"
   "<script>"
   "function _sa(url) {"
+  "var uri=document.createElement('input');"
+  "uri.setAttribute('type','hidden');"
+  "uri.setAttribute('name','uri');"
+  "uri.setAttribute('value','{{AUX_URI}}');"
+  "document.getElementById('_aux').appendChild(uri);"
   "document.getElementById('_aux').action=url;"
   "document.getElementById('_aux').submit();"
   "}"
@@ -122,6 +127,28 @@ bool AutoConnectAux::release(const String& name) {
   return rc;
 }
 
+/**
+ * Set the value to AutoConnectRadio element.
+ * @param  name    A string of AutoConnectRadio element name to set the value.
+ * @param  checked A checked value.
+ * @return true  The value was set.
+ * @return false An element specified name is not registered,
+ * or its element value does not match storage type.
+ */
+//bool AutoConnectAux::setElementValue(const String& name, const uint8_t checked) {
+//  AutoConnectElement* elm = getElement(name);
+//  if (elm) {
+//    if (elm->typeOf() == AC_Radio) {
+//      AutoConnectRadio* elmRadio = reinterpret_cast<AutoConnectRadio*>(elm);
+//      elmRadio->checked = checked;
+//      return true;
+//    }
+//    else
+//      AC_DBG("Element<%s> value type mismatch\n", name.c_str());
+//  }
+//  return false;
+//}
+
 /**
  * Set the value to specified element.
  * @param  name  A string of element name to set the value.
@@ -133,8 +160,19 @@ bool AutoConnectAux::release(const String& name) {
 bool AutoConnectAux::setElementValue(const String& name, const String value) {
   AutoConnectElement* elm = getElement(name);
   if (elm) {
-    if (elm->typeOf() != AC_Select && elm->typeOf() != AC_Radio) {
-      elm->value = value;
+    if (elm->typeOf() != AC_Select) {
+      if (elm->typeOf() == AC_Checkbox) {
+        if (value == "checked") {
+          AutoConnectCheckbox* elmCheckbox = reinterpret_cast<AutoConnectCheckbox*>(elm);
+          elmCheckbox->checked = true;
+        }
+      }
+      else if (elm->typeOf() == AC_Radio) {
+        AutoConnectRadio* elmRadio = reinterpret_cast<AutoConnectRadio*>(elm);
+        elmRadio->checked = static_cast<uint8_t>(value.toInt());
+      }
+      else
+        elm->value = value;
       return true;
     }
     else
@@ -213,6 +251,16 @@ void AutoConnectAux::_join(AutoConnect& ac) {
     _next->_join(ac);
 }
 
+/**
+ * Insert the uri that caused the request to the aux.
+ */
+const String AutoConnectAux::_indicateUri(PageArgument& args) {
+  AC_UNUSED(args);
+  String  lastUri = _ac->_auxLastUri;
+  lastUri.replace(String("/"), String("&#47;"));
+  return lastUri;
+}
+
 /**
  * Insert the token handler of PageBuilder. This handler inserts HTML
  * elements generated by the whole AutoConnectElements to the auxiliary page.
@@ -220,12 +268,38 @@ void AutoConnectAux::_join(AutoConnect& ac) {
  * @return HTML string that should be inserted.
  */
 const String AutoConnectAux::_insertElement(PageArgument& args) {
-  AC_UNUSED(args);
-  String  body = String();
+  // Save elements owned by AutoConnectAux that caused the request.
+  String  auxUri = args.arg("uri");
+  if (auxUri.length()) {
+    auxUri.replace(String("&#47;"), String("/"));
+    AutoConnectAux* auxPage = _ac->_aux.get();
+    while (auxPage) {
+      if (auxPage->_uriStr == auxUri)
+        break;
+      auxPage = auxPage->_next.get();
+    }
+    // Caused page is exist, restore elements value.
+    if (auxPage) {
+      for (size_t n = 0; n < args.size(); n++) {
+        String  elmName = args.argName(n);
+        String  elmValue = args.arg(n);
+        AutoConnectElement* elm = auxPage->getElement(elmName);
+        if (elm) {
+          if (elm->typeOf() == AC_Checkbox)
+            elmValue = "checked";
+          auxPage->setElementValue(elmName, elmValue);
+        }
+      }
+    }
+  }
+  // Save invoked Aux.
+  _ac->_auxLastUri = _uriStr;
 
+  // Build the current Aux page.
+  String  body = String();
   if (_handler) {
     if (_order & AC_EXIT_AHEAD) {
-      AC_DBG("CB %s\n", uri());
+      AC_DBG("CB in AHEAD %s\n", uri());
       body += _handler(*this, args);
     }
   }
@@ -237,11 +311,10 @@ const String AutoConnectAux::_insertElement(PageArgument& args) {
 
   if (_handler) {
     if (_order & AC_EXIT_LATER) {
-      AC_DBG("CB %s\n", uri());
+      AC_DBG("CB in LATER %s\n", uri());
       body += _handler(*this, args);
     }
   }
-
   return body;
 }
 
@@ -281,6 +354,7 @@ PageElement* AutoConnectAux::_setupPage(String uri) {
       elm->addToken(String(FPSTR("MENU_PRE")), std::bind(&AutoConnect::_token_MENU_PRE, mother, std::placeholders::_1));
       elm->addToken(String(FPSTR("MENU_AUX")), std::bind(&AutoConnect::_token_MENU_AUX, mother, std::placeholders::_1));
       elm->addToken(String(FPSTR("MENU_POST")), std::bind(&AutoConnect::_token_MENU_POST, mother, std::placeholders::_1));
+      elm->addToken(String(FPSTR("AUX_URI")), std::bind(&AutoConnectAux::_indicateUri, this, std::placeholders::_1));
       elm->addToken(String(FPSTR("AUX_ELEMENT")), std::bind(&AutoConnectAux::_insertElement, this, std::placeholders::_1));
     }
   }
@@ -879,6 +953,9 @@ size_t AutoConnectAux::saveElement(Stream& out, std::vector<String> const& names
         }
       }
       size_n = element.printTo(out);
+      AC_DBG("");
+      element.printTo(Serial);
+      AC_DBG_DUMB("\n");
     }
     else if (amount == 0) {
       JsonObject& json = jb.createObject();
@@ -892,6 +969,9 @@ size_t AutoConnectAux::saveElement(Stream& out, std::vector<String> const& names
         elm.serialize(element);
       }
       size_n = json.prettyPrintTo(out);
+      AC_DBG("");
+      json.printTo(Serial);
+      AC_DBG_DUMB("\n");
     }
     else if (amount >= 2) {
       JsonArray& elements = jb.createArray();
@@ -906,6 +986,9 @@ size_t AutoConnectAux::saveElement(Stream& out, std::vector<String> const& names
         }
       }
       size_n = elements.prettyPrintTo(out);
+      AC_DBG("");
+      elements.printTo(Serial);
+      AC_DBG_DUMB("\n");
     }
   }
   return size_n;
diff --git a/src/AutoConnectAux.h b/src/AutoConnectAux.h
index e69e827..674372b 100644
--- a/src/AutoConnectAux.h
+++ b/src/AutoConnectAux.h
@@ -58,6 +58,8 @@ class AutoConnectAux : public PageBuilder {
   AutoConnectElement* getElement(const String& name);                   /**< Get registered AutoConnectElement as specified name */
   void  menu(const bool post) { _menu = post; }                         /**< Set or reset the display as menu item for this aux */
   bool  release(const String& name);                                    /**< Release an AutoConnectElement */
+//  bool  setElementValue(const String& name, const bool checked);        /**< Set checked value to specified AutoConnectChechbox element */
+//  bool  setElementValue(const String& name, const uint8_t checked);     /**< Set checked value to specified AutoConnectRadio element */
   bool  setElementValue(const String& name, const String value);        /**< Set value to specified element */
   bool  setElementValue(const String& name, std::vector<String> const& values);  /**< Set values collection to specified element */
   void  setTitle(const String title) { _title = title; }                /**< Set a title of the auxiliary page */
@@ -80,6 +82,7 @@ class AutoConnectAux : public PageBuilder {
   const String  _insertElement(PageArgument& args);                     /**< Insert a generated HTML to the page built by PageBuilder */
   const String  _injectTitle(PageArgument& args) const { (void)(args); return _title; } /**< Returns title of this page to PageBuilder */
   const String  _injectMenu(PageArgument& args);                        /**< Inject menu title of this page to PageBuilder */
+  const String  _indicateUri(PageArgument& args);                       /**< Inject the uri that caused the request */
   static AutoConnectElement&  _nullElement(void);                       /**< A static returning value as invalid */
 
 #ifdef AUTOCONNECT_USE_JSON
diff --git a/src/AutoConnectPage.cpp b/src/AutoConnectPage.cpp
index e8e0cd6..8d70f63 100644
--- a/src/AutoConnectPage.cpp
+++ b/src/AutoConnectPage.cpp
@@ -464,6 +464,8 @@ const char AutoConnect::_ELM_HTML_HEAD[] PROGMEM = {
   "<!DOCTYPE html>"
   "<html>"
   "<head>"
+  "<meta http-equiv=\"Pragma\" content=\"no-cache\">"
+  "<meta http-equiv=\"Cache-Control\" content=\"no-cache\">"
   "<meta charset=\"UTF-8\" name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
 };