adds #1137 connect retries

setConnectRetries()

WiFiManager.cpp

@@ -755,7 +755,7 @@ bool WiFiManager::shutdownConfigPortal(){
 // clean up, flow is convoluted, and causes bugs
 uint8_t WiFiManager::connectWifi(String ssid, String pass) {
   DEBUG_WM(DEBUG_VERBOSE,F("Connecting as wifi client..."));
-  
+  uint8_t retry = 1;
   uint8_t connRes = (uint8_t)WL_NO_SSID_AVAIL;
 
   setSTAConfig();
@@ -766,6 +766,10 @@ uint8_t WiFiManager::connectWifi(String ssid, String pass) {
   if(_cleanConnect) WiFi_Disconnect(); // disconnect before begin, in case anything is hung, this causes a 2 seconds delay for connect
   // @todo find out what status is when this is needed, can we detect it and handle it, say in between states or idle_status
 
+  while(retry <= _connectRetries){
+  if(_connectRetries > 1){
+      DEBUG_WM(F("Connect Wifi, ATTEMPT #"),(String)retry+" of "+(String)_connectRetries); 
+  }
   // if ssid argument provided connect to that
   if (ssid != "") {
     wifiConnectNew(ssid,pass);
@@ -783,11 +787,13 @@ uint8_t WiFiManager::connectWifi(String ssid, String pass) {
       connRes = waitForConnectResult();
     }
     else {
-      DEBUG_WM(F("No wifi save required, skipping"));
+      DEBUG_WM(F("No wifi saved, skipping"));
     }
   }
 
   DEBUG_WM(DEBUG_VERBOSE,F("Connection result:"),getWLStatusString(connRes));
+  retry++;
+}
 
 // WPS enabled? https://github.com/esp8266/Arduino/pull/4889
 #ifdef NO_EXTRA_4K_HEAP
@@ -2057,6 +2063,17 @@ void WiFiManager::setConfigPortalTimeout(unsigned long seconds) {
 void WiFiManager::setConnectTimeout(unsigned long seconds) {
   _connectTimeout = seconds * 1000;
 }
+
+/**
+ * [setConnectRetries description]
+ * @access public
+ * @param {[type]} uint8_t numRetries [description]
+ */
+void WiFiManager::setConnectRetries(uint8_t numRetries){
+  _connectRetries = numRetries;
+  if(_connectRetries > 10) numRetries = 10; // some cap
+}
+
 /**
  * toggle _cleanconnect, always disconnect before connecting
  * @param {[type]} bool enable [description]

WiFiManager.h

@@ -226,6 +226,9 @@ class WiFiManager
 
     //sets timeout for which to attempt connecting, useful if you get a lot of failed connects
     void          setConnectTimeout(unsigned long seconds);
+
+    // sets number of retries for autoconnect, force retry after wait failure exit
+    void          setConnectRetries(uint8_t numRetries); // default 1
     
     //sets timeout for which to attempt connecting on saves, useful if there are bugs in esp waitforconnectloop
     void          setSaveConnectTimeout(unsigned long seconds);
@@ -403,7 +406,9 @@ class WiFiManager
     bool          _channelSync            = false; // use same wifi sta channel when starting ap
     int32_t       _apChannel              = 0; // channel to use for ap
     bool          _apHidden               = false; // store softap hidden value
-    uint16_t       _httpPort              = 80; // port for webserver
+    uint16_t      _httpPort               = 80; // port for webserver
+    // uint8_t       _retryCount             = 0; // counter for retries, probably not needed if synchronous
+    uint8_t       _connectRetries         = 1; // number of sta connect retries, force reconnect, wait loop (connectimeout) does not always work and first disconnect bails
 
     #ifdef ESP32
     wifi_event_id_t wm_event_id;

examples/DEV/OnDemandConfigPortal/OnDemandConfigPortal.ino

@@ -162,7 +162,10 @@ void setup() {
   
   // set connection timeout
   // wm.setConnectTimeout(20);
-  
+
+  // set wifi connect retries
+  // wm.setConnectRetries(2);
+
   // show static ip fields
   // wm.setShowStaticFields(true);
   
@@ -171,8 +174,7 @@ void setup() {
   // This is sometimes necessary, it is still unknown when and why this is needed but it may solve some race condition or bug in esp SDK/lib
   // wm.setCleanConnect(true); // disconnect before connect, clean connect
   
-  // 
-  wm.setBreakAfterConfig(true);
+  wm.setBreakAfterConfig(true); // needed to use saveWifiCallback
 
   // set custom webserver port, automatic captive portal does not work with custom ports!
   // wm.setHttpPort(8080);