WiFi: scan Networks only if security type is unknown

Author: pennam

libraries/WiFi/src/WiFi.cpp

@@ -53,20 +53,20 @@ int arduino::WiFiClass::begin(const char* ssid, const char* passphrase, wl_enc_t
 
   wifi_if->attach(&arduino::WiFiClass::statusCallback);
 
-  scanNetworks();
-
-  if (isVisible(ssid)) {
-    // Set the network security mode from the scan result.
-    _security = ap_list[connected_ap].get_security();
-  } else {
-    // For hidden networks, the security mode must be set explicitly.
-    // if ENC_TYPE_UNKNOWN this means that is the default value and so the user
-    // has not set it... no worth trying, it is probably an unknown (not hidden) 
-    // interface
-    if(security == ENC_TYPE_UNKNOWN) {
+  if(security == ENC_TYPE_UNKNOWN) {
+    scanNetworks();
+    if (isVisible(ssid)) {
+      // Set the network security mode from the scan result.
+      _security = ap_list[connected_ap].get_security();
+    } else {
+      // For hidden networks, the security mode must be set explicitly.
+      // if ENC_TYPE_UNKNOWN this means that is the default value and so the user
+      // has not set it... no worth trying, it is probably an unknown (not hidden)
+      // interface
       _currentNetworkStatus = WL_CONNECT_FAILED;
       return _currentNetworkStatus;
     }
+  } else {
     _security = enum2sec(security);
   }