adds preloadWiFi default ssid pass

WiFiManager.cpp

@@ -316,7 +316,7 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
       // and we have no idea WHAT we are connected to
     }
 
-    if(connected || connectWifi("", "") == WL_CONNECTED){
+    if(connected || connectWifi(_defaultssid, _defaultpass) == WL_CONNECTED){
       //connected
       #ifdef WM_DEBUG_LEVEL
       DEBUG_WM(F("AutoConnect: SUCCESS"));
@@ -2921,6 +2921,13 @@ void WiFiManager::setHttpPort(uint16_t port){
   _httpPort = port;
 }
 
+
+bool WiFiManager::preloadWiFi(String ssid, String pass){
+  _defaultssid = ssid;
+  _defaultpass = pass;
+  return true;
+}
+
 // HELPERS
 
 /**

WiFiManager.h

@@ -367,6 +367,9 @@ class WiFiManager
     // check if web portal is active (true)
     bool          getWebPortalActive();
 
+    // to preload autoconnect for test fixtures or other uses that skip esp sta config
+    bool          preloadWiFi(String ssid, String pass);
+
     std::unique_ptr<DNSServer>        dnsServer;
 
     #if defined(ESP32) && defined(WM_WEBSERVERSHIM)
@@ -397,9 +400,11 @@ class WiFiManager
     const byte    HTTP_PORT               = 80;
     String        _apName                 = "no-net";
     String        _apPassword             = "";
-    String        _ssid                   = "";
-    String        _pass                   = "";
-    
+    String        _ssid                   = ""; // var temp ssid
+    String        _pass                   = ""; // var temp psk
+    String        _defaultssid            = ""; // preload ssid
+    String        _defaultpass            = ""; // preload pass
+
     // options flags
     unsigned long _configPortalTimeout    = 0; // ms close config portal loop if set (depending on  _cp/webClientCheck options)
     unsigned long _connectTimeout         = 0; // ms stop trying to connect to ap if set
@@ -467,6 +472,7 @@ class WiFiManager
     // cache time helps throttle this
     // async enables asyncronous scans, so they do not block anything
     // the refresh button bypasses cache
+    // no aps found is problematic as scans are always going to want to run, leading to page load delays
     boolean       _preloadwifiscan        = false;  // preload wifiscan if true
     boolean       _asyncScan              = false; // perform wifi network scan async
     unsigned int  _scancachetime          = 30000; // ms cache time for background scans