Updated the main app by adding the previousDisplay functionality

src/app/SAB.cpp

@@ -138,3 +138,11 @@ unsigned char SAB::getError() const
 {
   return _error;
 }
+
+void SAB::run()
+{
+  _webServer.run();
+  _ftpServer.run();
+  _taskSchedulerManager.run();
+  _screenManager.run();
+}

src/app/SAB.h

@@ -41,6 +41,7 @@ class SAB
     PowerManager& getPowerManager();
     TimeSpan getUpTime();
     BoardConfig getBoardConfig() const;
+    void run();
     
     const char *getSoftVersion() const;
     unsigned char getError() const;

src/app/ScreenManager.cpp

@@ -1,6 +1,8 @@
 #include "ScreenManager.h"
 
-ScreenManager::ScreenManager(Adafruit_SSD1306 &display, SDCardManager *sdCardManager) : _displayRef(display), _displayColorInverted(false), _displayDimmed(false), _enabled(true), _currentView(NO_CURRENT_VIEW), _error(OK)
+ScreenManager::ScreenManager(Adafruit_SSD1306 &display, SDCardManager *sdCardManager) : _displayRef(display), _error(OK)
+, _displayColorInverted(false), _displayDimmed(false), _enabled(true), _refreshRateHz(1), _refreshInterval(1000), _timeRef(0),_forceRefresh(false)
+, _currentView(NO_CURRENT_VIEW), _tail(NULL)
 , _viewNotFound{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL}
 , _viewFuncUndefined{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL}
 , _currentViewUndefined{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL}
@@ -8,6 +10,10 @@ ScreenManager::ScreenManager(Adafruit_SSD1306 &display, SDCardManager *sdCardMan
 ,_sdCardManager(sdCardManager)
 {  
   _viewLinkedList = (ViewLinkedList) createEmptyList();
+  //We set the error messages :
+  ((ErrorInfo *)_viewNotFound.pData)->errorMessage = FPSTR("View does not exist");
+  ((ErrorInfo *)_viewFunctionFailedToExecute.pData)->errorMessage = FPSTR("View function failed\nto execute");
+  ((ErrorInfo *)_viewFuncUndefined.pData)->errorMessage = FPSTR("View function is NULL");
 }
 
 boolean ScreenManager::init()
@@ -66,8 +72,8 @@ void ScreenManager::setDefault()
 
 boolean ScreenManager::addView(boolean (*viewLogicFunction)(Adafruit_SSD1306&, void*), void *pData, const unsigned char UID)
 {
-  ViewLink viewLink ={viewLogicFunction, pData, UID, NULL};
-  addNewLinkAtTheEnd(&_viewLinkedList, viewLink);
+  ViewLink viewLink ={viewLogicFunction, pData, UID, NULL, NULL};
+  return addNewLinkAtTheEnd(&_viewLinkedList, viewLink);
 }
 
 void *ScreenManager::createEmptyList()
@@ -87,33 +93,48 @@ boolean ScreenManager::addNewLinkAtTheEnd(ViewLinkedList *viewLinkedList, ViewLi
   //Because of the const member
   memcpy(newViewLink, &viewLink, sizeof(*newViewLink));
 
-  if(isListEmpty(*viewLinkedList))*viewLinkedList = newViewLink;
-  else
+  //If this is the first link
+  if(isListEmpty(*viewLinkedList))
   {
-    if((*viewLinkedList)->UID == newViewLink->UID)
-    {
-        ViewLink *link = *viewLinkedList;
+    //The link list points to the first link (aka the head)
     *viewLinkedList = newViewLink;
-        newViewLink->next = link->next;
-        free(link);
+    //The previous pointer is still NULL;
+    //The _tail pointer is the same as the head one.
+    _tail = *viewLinkedList;
+  }
+  else //If there are some links already
+  {
+    ViewLinkedList *cursor = viewLinkedList;
+    ViewLink *previousLink = NULL;
+
+    while(*cursor != NULL)
+    {
+      previousLink = *cursor;
+      //We check if the UID already exists, if yes we replace the link
+      if((*cursor)->UID == newViewLink->UID)
+      {
+        ViewLink *toDelete = *cursor;
+        *cursor = newViewLink;
+        newViewLink->next = toDelete->next;
+        newViewLink->previous = toDelete->previous;
+        //We check if the link as a next link registered
+        if(toDelete->next != NULL)
+        {
+          //We update it's previous link since it's going to be deleted
+          toDelete->next->previous = newViewLink;
+        }
+        //We do not forget to check if the link replaced is also the tail, in this case, we must update the tail
+        if(_tail == toDelete)_tail = newViewLink;
+        free(toDelete);
+
         return true;
       }
-    
-    ViewLinkedList cursor = *viewLinkedList;
-    
-    while(cursor->next != NULL)
-    {
-      if(cursor->next->UID == newViewLink->UID)
-      {
-        ViewLink *link = cursor->next;
-        cursor->next = newViewLink;
-        newViewLink->next = link->next;
-        free(link);
-        return true;
+      cursor = &(*cursor)->next;
     }
-      cursor = cursor->next;
-    }
-    cursor->next = newViewLink;
+    newViewLink->previous = previousLink;
+    *cursor = newViewLink;
+    //We need to update the tail
+    _tail = newViewLink;
   }
   
   return true;
@@ -128,25 +149,28 @@ boolean ScreenManager::removeLinkByUID(ViewLinkedList *viewLinkedList, const uns
 {
   if(isListEmpty(*viewLinkedList))return false;
 
-  if((*viewLinkedList)->UID == UID)
-  {
-    ViewLink *tmp = *viewLinkedList;
-    *viewLinkedList = (*viewLinkedList)->next;
-    free(tmp);
-    return true;
-  }
+  ViewLinkedList *cursor = viewLinkedList;
 
-  ViewLinkedList cursor = *viewLinkedList;
-  while(!isListEmpty(cursor->next))
+  while(*cursor != NULL)
   {
-    if(cursor->next->UID == UID)
+    //We check if this is the link we want to delete
+    if((*cursor)->UID == UID)
     {
-      ViewLink *tmp = cursor->next;
-      cursor->next = cursor->next->next;
-      free(tmp);
+      ViewLink *toDelete = *cursor;
+      *cursor = (*cursor)->next;
+
+      if(toDelete->next != NULL)
+      {
+        //We update the previous link of the next member since it's going to be deleted
+        toDelete->next->previous = toDelete->previous;
+      }
+      //We also update the tail if the link we delete was the tail
+      if(_tail == toDelete)_tail = toDelete->previous;
+
+      free(toDelete);
       return true;
     }
-     cursor = cursor->next;
+    cursor = &(*cursor)->next;
   }
   return false;
 }
@@ -186,119 +210,135 @@ ViewLink* ScreenManager::getLinkByUID(ViewLinkedList viewLinkedList, const unsig
   return NULL;
 }
 
-boolean ScreenManager::displayView(const int UID)
+void ScreenManager::run()
 {
-  if(!_enabled) return true;
-  //Reset draw settings:
+  if((millis() - _timeRef < _refreshInterval && !_forceRefresh) || !_enabled) return;
+
+  _timeRef = millis();
+  
+  if(((_error == OK || _error == VIEW_FAILED_TO_EXECUTE) || _forceRefresh) && _currentView != NO_CURRENT_VIEW)
+  {
     _displayRef.clearDisplay();
     _displayRef.setCursor(0,0);
     _displayRef.setTextSize(1);
 
-  
-  if(UID == -1 && _currentView == NO_CURRENT_VIEW)
+    switch(_error)
     {
-    //We display an error message on the screen
-    ((ErrorInfo *)_currentViewUndefined.pData)->errorMessage = FPSTR("Could not display current view");
-    ((ErrorInfo *)_currentViewUndefined.pData)->viewUID = UID;
-    (*_currentViewUndefined.viewLogicFunction)(_displayRef, _currentViewUndefined.pData);
-    _displayRef.display();
-
-    _error = CURRENT_VIEW_UNDEFINED;
-    return false;
-  }
-  else if(UID == -1)
+      case OK:
+      case VIEW_FAILED_TO_EXECUTE:
+        if(!(*_currentView->viewLogicFunction)(_displayRef, _currentView->pData))
         {
-    if(_currentView->viewLogicFunction == NULL)
-    {
-      //We display an error message on the screen
-      ((ErrorInfo *)_viewFuncUndefined.pData)->errorMessage = FPSTR("View function is NULL");
-      ((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = _currentView->UID;
-      (*_viewFuncUndefined.viewLogicFunction)(_displayRef, _viewFuncUndefined.pData);
-      _displayRef.display();
-
-      _error = VIEW_FUNC_UNDEFINED;
-      return false;
-    }
-    else if(!(*_currentView->viewLogicFunction)(_displayRef, _currentView->pData))
-    {
-      //We display an error message on the screen
           _displayRef.clearDisplay();
-      ((ErrorInfo *)_viewFunctionFailedToExecute.pData)->errorMessage = FPSTR("View function failed\nto execute");
+          //Error while executing the view function
           ((ErrorInfo *)_viewFunctionFailedToExecute.pData)->viewUID = _currentView->UID;
           (*_viewFunctionFailedToExecute.viewLogicFunction)(_displayRef, _viewFunctionFailedToExecute.pData);
-      _displayRef.display();
         
           _error = VIEW_FAILED_TO_EXECUTE;
-      return false;
         }
-
+        else
           _error = OK;
-    _displayRef.display();
-    return true;
+       break;
+       case VIEW_NOT_FOUND:
+          (*_viewNotFound.viewLogicFunction)(_displayRef, _viewNotFound.pData);
+        break;
+       case VIEW_FUNC_UNDEFINED:
+          (*_viewFuncUndefined.viewLogicFunction)(_displayRef, _viewFuncUndefined.pData);
+        break;
     }
     
+    _displayRef.display();
+    _forceRefresh = false;
+  }
+}
+
+boolean ScreenManager::displayView(const uint8_t UID)
+{
+  if(!_enabled) return true;
+  _forceRefresh = true;
   ViewLink *viewLink = getLinkByUID(_viewLinkedList, UID);
+  
   if(viewLink == NULL)
   {
     //We display an error message on the screen
-    ((ErrorInfo *)_viewNotFound.pData)->errorMessage = FPSTR("View does not exist");
     ((ErrorInfo *)_viewNotFound.pData)->viewUID = UID;
-    (*_viewNotFound.viewLogicFunction)(_displayRef, _viewNotFound.pData);
-    _displayRef.display();
-
     _error = VIEW_NOT_FOUND;
-    _currentView = &_viewNotFound;
     return false;
-  }else if(viewLink->viewLogicFunction == NULL)
+  }
+  else if(viewLink->viewLogicFunction == NULL)
   {
     //We display an error message on the screen
-    ((ErrorInfo *)_viewFuncUndefined.pData)->errorMessage = FPSTR("View function is NULL");
     ((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = UID;
-    (*_viewFuncUndefined.viewLogicFunction)(_displayRef, _viewFuncUndefined.pData);
-    _displayRef.display();
-
     _error = VIEW_FUNC_UNDEFINED;
     _currentView = viewLink;
     return false;
   }
 
-  
-  if(!(*viewLink->viewLogicFunction)(_displayRef, viewLink->pData))
-  {
-    //We display an error message on the screen
-      _displayRef.clearDisplay();
-      ((ErrorInfo *)_viewFunctionFailedToExecute.pData)->errorMessage = FPSTR("View function failed\nto execute");
-      ((ErrorInfo *)_viewFunctionFailedToExecute.pData)->viewUID = UID;
-      (*_viewFunctionFailedToExecute.viewLogicFunction)(_displayRef, _viewFunctionFailedToExecute.pData);
-      _displayRef.display();
-
-      _error = VIEW_FAILED_TO_EXECUTE;
-      _currentView = viewLink;
-      return false;
-  }
-  
-  _displayRef.display();
   _currentView = viewLink;
   _error = OK;
-  return true;
+  run();
+  return _error == OK;
 }
 
-boolean ScreenManager::displayNextView()
+void ScreenManager::displayNextView()
 {
+  _forceRefresh = true;
+  _error = OK;
   if(_currentView == NO_CURRENT_VIEW && !isListEmpty(_viewLinkedList))
   {
     _currentView = _viewLinkedList;
-    return displayView();
   }
-    
-  if(!isListEmpty(_currentView->next))
+  else if(!isListEmpty(_currentView->next))
   {
     _currentView = _currentView->next;
-    return displayView();
+  }
+  //End of the views, we cycle again :)
+  else if(isListEmpty(_currentView->next) && !isListEmpty(_viewLinkedList))
+  {
+    _currentView = _viewLinkedList;
   }
 
-  _currentView = _viewLinkedList;
-  return displayView();
+  //We check if the view function is defined :
+  if(_currentView != NO_CURRENT_VIEW)
+  {
+    if(_currentView->viewLogicFunction == NULL)
+    {
+      ((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = _currentView->UID;
+      _error = VIEW_FUNC_UNDEFINED;
+    }
+  }
+
+  run();
+}
+
+void ScreenManager::displayPreviousView()
+{
+  _forceRefresh = true;
+  _error = OK;
+  if(_currentView == NO_CURRENT_VIEW && !isListEmpty(_tail))
+  {
+    _currentView = _tail;
+  }
+  else if(!isListEmpty(_currentView->previous))
+  {
+    _currentView = _currentView->previous;
+  }
+  //End of the views, we cycle again :)
+  else if(isListEmpty(_currentView->previous) && !isListEmpty(_tail))
+  {
+    _currentView = _tail;
+  }
+
+  //We check if the view function is defined :
+  if(_currentView != NO_CURRENT_VIEW)
+  {
+    if(_currentView->viewLogicFunction == NULL)
+    {
+      ((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = _currentView->UID;
+      _error = VIEW_FUNC_UNDEFINED;
+    }
+  }
+
+  run();
 }
 
 void ScreenManager::invertDisplayColor(const boolean inverted)
@@ -354,6 +394,20 @@ void ScreenManager::clearDisplay(const boolean bufferOnly)
   }
 }
 
+void ScreenManager::clearViews()
+{
+  ViewLinkedList cursor = _viewLinkedList;
+  while(!isListEmpty(cursor))
+  {
+    ViewLink *toDelete = cursor;
+    cursor = cursor->next;
+    free(cursor);
+  }
+  //Do not forget to mark the list as empty
+  _viewLinkedList = NULL;
+  _tail = NULL;
+}
+
 void ScreenManager::setEnabled(boolean value)
 {
   _enabled = value;

src/app/ScreenManager.h

@@ -16,18 +16,21 @@ class ScreenManager
   
     boolean addView(boolean (*viewLogicFunction)(Adafruit_SSD1306&, void*), void *pData, const unsigned char UID);
     boolean removeView(const unsigned char UID);
-    boolean displayView(const int UID = -1);
-    boolean displayNextView();
+    boolean displayView(const uint8_t UID);
+    void displayNextView();
+    void displayPreviousView();
     boolean applyCfgFromSD();
     void invertDisplayColor(const boolean inverted);
     void orientDisplay(const Orientation orientation);
     void dimDisplay(const boolean dimmed);
     void clearDisplay(const boolean bufferOnly = false);
+    void clearViews();
     void sleep();
     void wakeUp();
     void setEnabled(boolean value);
     boolean getEnabled();
     boolean init();
+    void run();
     
     Error getError() const;
     const char* getErrorMessage() const;
@@ -58,7 +61,11 @@ class ScreenManager
     boolean _displayColorInverted;
     boolean _displayDimmed;
     boolean _enabled;
-    ViewLink* _currentView;
+    uint8_t _refreshRateHz;
+    uint16_t _refreshInterval;
+    uint64_t _timeRef;
+    boolean _forceRefresh;
+    ViewLink *_currentView, *_tail;
     ViewLink _viewNotFound, _viewFuncUndefined, _currentViewUndefined, _viewFunctionFailedToExecute;
     SDCardManager *_sdCardManager;
     

src/app/TCPServer.h

@@ -38,13 +38,13 @@ class TCPServer
       return _clientList.count();
     }
     
-    virtual void runServer()
+    virtual void run()
     {
       handleNewClients();
       getClientData();
     }
     
-  	virtual void startServer()
+  	virtual void start()
     {
       if(!_serverStarted)
       {
@@ -53,7 +53,7 @@ class TCPServer
       }
     }
   
-  	virtual void stopServer()
+  	virtual void stop()
     {
       if(_serverStarted)
       {

src/app/TaskSchedulerManager.cpp

@@ -164,7 +164,7 @@ boolean TaskSchedulerManager::clearTask()
   _taskDataDictio.clear();
 }
 
-void TaskSchedulerManager::runTaskScheduler()
+void TaskSchedulerManager::run()
 {
   if(_taskDataDictio.count() == 0)return;
   

src/app/TaskSchedulerManager.h

@@ -69,7 +69,7 @@ class TaskSchedulerManager
     boolean disableTask(const char *name);
     boolean disableTask(uint16_t id);
     boolean clearTask();
-    void runTaskScheduler();
+    void run();
     const unsigned int taskCount();
     uint16_t findFreeTaskId();
   protected:

src/app/app.ino

@@ -9,15 +9,16 @@
 
 SAB sab;
 
-unsigned long currentMs = 0, buttonMs = 0;
+unsigned long currentMs = 0, buttonDownMs(0), buttonUpMs(0);
 volatile boolean ioStateChange(false);
+boolean buttonPushSampled(false);
 View1Packet v1p = {sab.getRtcManager().getDateTime(), sab.getSdCardManager().getSize(GBYTE), sab.getPowerManager().getPowerInfo(),0, sab.getSoftVersion(), &sab};
 ViewAPPacket vap = {sab.getConnectivityManager().softAPmacAddress(), sab.getConnectivityManager().softAPSSID(), sab.getConnectivityManager().softAPIP(), sab.getConnectivityManager().softAPgetStationNum(), sab.getConnectivityManager().isAPEnabled()};
 ViewSTAPacket vstap = {sab.getConnectivityManager().macAddress(), sab.getConnectivityManager().localIP(), sab.getConnectivityManager().RSSI(), sab.getConnectivityManager().isSTAEnabled()};
 ViewIoInfoPacket vio = {{0},{0}};
 SdCardApiPacket sdCardApiPacket = {NULL, NULL};
 
-DataLogger dataLogger = {HttpClient("192.168.0.17", "/esp8266/dataLogger.php", 1234), 0, false};
+//DataLogger dataLogger = {HttpClient("192.168.0.17", "/esp8266/dataLogger.php", 1234), 0, false};
 
 void setup() 
 {
@@ -70,6 +71,7 @@ void setup()
   sab.getWebServer().addApiRoutine("/esp/restart", &(espRestartApi), &sab, WEBServer<WEBClient>::GET);
   sab.getWebServer().addApiRoutine("/esp/reset", &(espResetApi), &sab, WEBServer<WEBClient>::GET);
   sab.getWebServer().addApiRoutine("/sab/wifi/stainfo", &(staWifiInfoApi), &sab, WEBServer<WEBClient>::GET);
+  sab.getWebServer().addApiRoutine("/sab/wifi/scanner", &(apScannerApi), NULL, WEBServer<WEBClient>::GET);
   sab.getWebServer().addApiRoutine("/sab/systeminfo", &(systemInfoApi), &sab, WEBServer<WEBClient>::GET);
   sab.getWebServer().addApiRoutine("/sab/power/info", &(powerInfoApi), &sab, WEBServer<WEBClient>::GET);
   sab.getWebServer().addApiRoutine("/sab/power/set/freq", &(powerSettingsApi), &sab, WEBServer<WEBClient>::GET);
@@ -82,8 +84,8 @@ void setup()
 
   sab.getTaskSchedulerManager().addTask((uint16_t)0, TaskSchedulerManagerHelper::Schedule::scheduleBuilder()->setMillis(5000), &(task_blink), &sab);
   sab.getTaskSchedulerManager().addTask(1, TaskSchedulerManagerHelper::Schedule::scheduleBuilder()->setSeconds(10), &(task_batt_sensing), &v1p);
-  dataLogger.client.keepAlive(true);
-  sab.getTaskSchedulerManager().addTask(2, TaskSchedulerManagerHelper::Schedule::scheduleBuilder()->setSeconds(1)->setTriggerRightAway(false), &(task_post_data_logger), &dataLogger);
+  //dataLogger.client.keepAlive(true);
+  //sab.getTaskSchedulerManager().addTask(2, TaskSchedulerManagerHelper::Schedule::scheduleBuilder()->setSeconds(1)->setTriggerRightAway(false), &(task_post_data_logger), &dataLogger);
   
   Serial.println("End setup");
 }
@@ -106,13 +108,11 @@ void loop()
     sab.getIoManager().getPcf().digitalReadAll(vio.ioState);
     sab.getIoManager().getPcf().getPinModeAll(vio.ioMode);
 
-    sab.getScreenManager().displayView();
-
     if(ioStateChange) Serial.println(F("ISR triggered"));
     ioStateChange = false;
   }
   
-  if(digitalRead(GPIO_0) == 0 && millis() - buttonMs > 500)
+  /*if(digitalRead(GPIO_0) == 0 && millis() - buttonMs > 500)
   {
     buttonMs = millis();
     sab.getScreenManager().displayNextView();
@@ -120,12 +120,40 @@ void loop()
     Serial.println("Changing view");
     Serial.print("Selected view is : ");Serial.println(sab.getScreenManager().getCurrentViewUID());
     #endif
+  }*/
+
+  if(digitalRead(GPIO_0) == 0 && !buttonPushSampled)
+  {
+    buttonPushSampled = true;  
+    buttonDownMs = millis();
   }
 
-  //Run the webServer
-  sab.getWebServer().runServer();
-  sab.getFtpServer().runServer();
-  sab.getTaskSchedulerManager().runTaskScheduler();
+  if(digitalRead(GPIO_0) == 1 && buttonPushSampled)
+  {
+    buttonPushSampled = false;
+    buttonUpMs = millis();
+
+    if(buttonUpMs - buttonDownMs < 700 && buttonUpMs - buttonDownMs > 200)//Short press
+    {
+      sab.getScreenManager().displayNextView();
+      #ifdef DEBUG
+      Serial.printf("Changing view\nSelected view is : %d\n",sab.getScreenManager().getCurrentViewUID());
+      #endif
+    }
+  }
+
+  if(digitalRead(GPIO_0) == 0 && buttonPushSampled && millis() - buttonDownMs > 700)
+  {
+    buttonPushSampled = false;
+    
+    sab.getScreenManager().displayPreviousView();
+    #ifdef DEBUG
+    Serial.printf("Changing view\nSelected view is : %d\n",sab.getScreenManager().getCurrentViewUID());
+    #endif
+  }
+
+  //Run the differentes services
+  sab.run();
 }
 
 ICACHE_RAM_ATTR void ioISR()

src/app/definition.h

@@ -48,7 +48,7 @@ typedef struct viewLink{
     boolean (*viewLogicFunction)(Adafruit_SSD1306&, void*);
     void *pData;
     const int UID;
-    struct viewLink *next;
+    struct viewLink *next, *previous;
 } ViewLink, *ViewLinkedList;
 
 char *addChar(char *pointer, const char character);

src/app/versions.h

@@ -30,5 +30,8 @@
 #define SOFT_VERSION "1.5.5" //WEBServer now parsing form parameters in the post data section
 #define SOFT_VERSION "1.5.6" //Added new SAB method to set te cpu frequency at run time
 #define SOFT_VERSION "1.6.0" //Added the new HttpClient class along with tests in a new task
+#define SOFT_VERSION "1.6.1" //Reworked the ScreenManager in order to display previous views and did some code optimization
+#define SOFT_VERSION "1.6.2" //Added a run method to the screen manager and reworked the error system
+#define SOFT_VERSION "1.6.3" //Added a new api call to get nearby wifi access points
 
 #endif //VERSIONS_H

src/app/webApi.cpp

@@ -38,7 +38,10 @@ boolean nextViewApi(WEBServer<WEBClient>::HttpRequestData &HRD, WiFiClient *wc,
 {
   SAB *p = (SAB *)pData;
   char buffer[200];
-  if(p->getScreenManager().displayNextView())
+  
+  p->getScreenManager().displayNextView();
+  
+  if(p->getScreenManager().getError() == OK)
     sprintf(buffer, "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n{ \"status\" : \"ok\", \"ViewUID\" : \"%d\" }", p->getScreenManager().getCurrentViewUID());
   else
     sprintf(buffer, "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n{ \"status\" : \"failed\", \"message\" : \"%s\" }", p->getScreenManager().getErrorMessage());
@@ -215,6 +218,20 @@ boolean staWifiInfoApi(WEBServer<WEBClient>::HttpRequestData &HRD, WiFiClient *w
   return true;
 }*/
 
+boolean apScannerApi(WEBServer<WEBClient>::HttpRequestData &HRD, WiFiClient *wc, void *pData)
+{
+  uint8_t number = WiFi.scanNetworks();
+  wc->print("HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n[");
+    
+  for(uint8_t i(0); i < number; i++)
+  {
+    wc->printf("%s{\"SSID\":\"%s\",\"RSSI\":%d,\"Protected\":\"%s\"}", i == 0 ? "":",", WiFi.SSID(i).c_str(),  WiFi.RSSI(i), WiFi.encryptionType(i) == ENC_TYPE_NONE ? "No":"Yes");
+  }
+  
+  wc->print("]");
+  return true;
+}
+
 boolean systemInfoApi(WEBServer<WEBClient>::HttpRequestData &HRD, WiFiClient *wc, void *pData)
 {
   SAB *p = (SAB *)pData;

src/app/webApi.h

@@ -19,6 +19,7 @@ typedef struct sdCardApiPacket
 boolean sdCardUnmountApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);
 boolean sdCardMountApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);
 
+boolean apScannerApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);
 boolean staWifiInfoApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);
 boolean apWifiInfoApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);
 boolean espRestartApi(WEBServer<WEBClient>::HttpRequestData&, WiFiClient*, void*);