[WiFi] Fix stack overflow crash when no credentials set

src/ESPEasy/net/DataStructs/NWPluginData_static_runtime.cpp

@@ -246,12 +246,16 @@ void NWPluginData_static_runtime::processEvents()
 
   if (connected_changed || establishConnect_changed)
   {
-    if (_connectedStats.isOn()) {
-      log_connected();
-
-      //    _establishConnectStats.resetCount();
-    } else if (_connectedStats.isOff() && !_establishConnectStats.isOn()) {
-      log_disconnected();
+    if (_establishConnectStats.isSet()) {
+      if (_connectedStats.isOn()) {
+        log_connected();
+
+        //    _establishConnectStats.resetCount();
+      } else if (_establishConnectStats.isSet() &&
+                 _connectedStats.isOff() &&
+                 !_establishConnectStats.isOn()) {
+        log_disconnected();
+      }
     }
   }
 

src/ESPEasy/net/wifi/ESPEasyWiFi_STA_State.dotuml

@@ -0,0 +1,54 @@
+StateDiagram [frame=true framecolor=steelblue label="State Diagram ESPEasy WiFi_STA_State_e"] {
+  state Disabled [fillcolor=lightblue]
+  state TimeOut as "TimeOut/\nError" [fillcolor=orangered]
+  state Idle
+  state IdleWaiting
+  state STA_Scanning as "STA\nScanning"
+  state STA_AP_Scanning as "STA+AP\nScanning"
+  state STA_Connecting as "STA\nConnecting"
+  state STA_Reconnecting as "STA\nReconnecting"
+  state STA_Connected as "STA\nConnected" [fillcolor=palegreen]
+
+  choice AlreadyConnected
+  choice AP_on_no_nw_found
+  choice KnownAPfound
+  choice KnownAPonDisconnect
+
+  choice ExitSTA
+
+  initialState->Disabled
+
+
+  Disabled -> IdleWaiting "Init STA"
+  Disabled <- ExitSTA  "Exit STA"
+  IdleWaiting -> AlreadyConnected "Already\nConnected?"
+  AlreadyConnected -> STA_Connected "Connected"
+  AlreadyConnected -> Idle "Ready"
+  Idle -> KnownAPfound "Known\nNetwork\nfound?"
+  KnownAPfound -> AP_on_no_nw_found "Scan\nNeeded"
+  KnownAPfound -> STA_Connecting "No Scan\nNeeded"
+  AP_on_no_nw_found -> STA_AP_Scanning "AP"
+  AP_on_no_nw_found -> STA_Scanning "No AP"
+
+  STA_Connecting -> STA_Connected
+  STA_Reconnecting -> STA_Connected 
+  KnownAPonDisconnect -> STA_Reconnecting  "No Scan\nNeeded"
+  KnownAPonDisconnect <- STA_Connected  "Disconnect"
+  IdleWaiting <- KnownAPonDisconnect "Scan\nNeeded"
+
+
+  IdleWaiting <- STA_Scanning "Scan\nDone"
+  IdleWaiting <- STA_AP_Scanning "Scan\nDone"
+
+  STA_AP_Scanning <- STA_AP_Scanning "Next\nChannel"
+
+  TimeOut <- STA_Scanning    "Scan\nFail"
+  TimeOut <- STA_AP_Scanning "Scan\nFail"
+  TimeOut <- STA_Connecting  "Connect\nFail"
+
+  TimeOut -> IdleWaiting
+
+  IdleWaiting <- IdleWaiting "Wait for\nStartup Delay/\nSetup"
+
+  TimeOut <- STA_Reconnecting "Reconnect\nFail"
+}

src/ESPEasy/net/wifi/ESPEasyWiFi_mode_state_machine.dotuml

@@ -0,0 +1,55 @@
+StateDiagram [frame=true framecolor=steelblue label="State Diagram ESPEasyWiFi_mode_e"] {
+  choice NeedSetup
+  choice HasCredentials
+  choice HasCredentialsSetupRequired
+  choice APalwaysOn
+  choice APalwaysOnNoCred
+
+  state STA_only
+  state STA_AP
+  state AP_only
+
+  state Off [fillcolor=lightblue]
+  state Setup with behaviors "WiFi scan\nStart webUI\nEnter Credentials\nSave" [fillcolor=yellow] {
+    state Scan as "STA_only Scan"
+    state StartAP as "AP_only\nWebUI"
+    state ClientConnect as "User Connects\nCaptive Portal to /setup"
+    state EnterCredentials as "Enter WiFi Credentials"
+    state ClientDisconnect as "User\nDisconnects"
+    state CredentialsUpdated as "Credentials Updated"
+
+    initialState -> Scan
+    Scan -> StartAP
+    StartAP -> ClientConnect
+    ClientDisconnect <- ClientConnect
+    Scan <- ClientDisconnect
+    Scan <- StartAP "Time Out"
+    ClientConnect -> EnterCredentials
+    EnterCredentials -> CredentialsUpdated
+    CredentialsUpdated -> finalState
+  }
+
+
+  initialState->Off
+  NeedSetup <- Off  "Check\nNeed Setup?"
+  NeedSetup -> HasCredentials "Setup not\nAllowed/\nRequired"
+  HasCredentials -> APalwaysOn "Has\nCredentials"
+  APalwaysOn -> STA_AP "AP Always On\nor\nSetup 1st connect"
+  APalwaysOn -> STA_only "No AP"
+  HasCredentials -> APalwaysOnNoCred "No\nCredentials"
+  Off <- APalwaysOnNoCred   "No AP"
+  APalwaysOnNoCred -> AP_only "AP"
+  NeedSetup -> HasCredentialsSetupRequired "Setup\nAllowed"
+  HasCredentialsSetupRequired -> APalwaysOn "Has Credentials,\nNo Setup"
+
+  Setup <- HasCredentialsSetupRequired "No Credentials,\nEnter Setup"
+  Setup -> NeedSetup "Setup\nDone"
+
+  STA_only <- STA_only "Retry/\nReconnect"
+  STA_AP -> AP_only "No Known\nNetwork found"
+
+  STA_AP <- STA_AP "Retry/\nReconnect"
+
+  Setup <- STA_AP "Setup\nFailed 1st\nConnect"
+
+}