WPA2 connection fix (significant improvement to connection time) (#2989)

* Config fix test

* Also force config even if equal

Author: boarchuz

libraries/WiFi/src/WiFiSTA.cpp

@@ -162,6 +162,8 @@ wl_status_t WiFiSTAClass::begin(const char* ssid, const char *passphrase, int32_
         esp_wifi_set_config(WIFI_IF_STA, &conf);
     } else if(status() == WL_CONNECTED){
         return WL_CONNECTED;
+    } else {
+        esp_wifi_set_config(WIFI_IF_STA, &conf);
     }
 
     if(!_useStaticIp) {
@@ -198,6 +200,12 @@ wl_status_t WiFiSTAClass::begin()
         return WL_CONNECT_FAILED;
     }
 
+    wifi_config_t current_conf;
+    if(esp_wifi_get_config(WIFI_IF_STA, &current_conf) != ESP_OK || esp_wifi_set_config(WIFI_IF_STA, &current_conf) != ESP_OK) {
+        log_e("config failed");
+        return WL_CONNECT_FAILED;
+    }
+
     if(!_useStaticIp) {
         if(tcpip_adapter_dhcpc_start(TCPIP_ADAPTER_IF_STA) == ESP_ERR_TCPIP_ADAPTER_DHCPC_START_FAILED){
             log_e("dhcp client start failed!");