correct compilation error for arduino

OpenMQTTGateway.ino

@@ -155,7 +155,7 @@ void setup_wifi() {
   IPAddress ip_adress(ip);
   IPAddress gateway_adress(gateway);
   IPAddress subnet_adress(subnet);
-  IPAddress dns_adress(dns);
+  IPAddress dns_adress(Dns);
   WiFi.begin(wifi_ssid, wifi_password);
   WiFi.config(ip_adress,gateway_adress,subnet_adress); //Uncomment this line if you want to use advanced network config
   trc("OpenMQTTGateway ip adress: ");   
@@ -169,12 +169,10 @@ void setup_wifi() {
 }
 #else
 void setup_ethernet() {
-
   Ethernet.begin(mac, ip); //Comment and uncomment the following line if you want to use advanced network config
-  //Ethernet.begin(mac, ip, dns, gateway, subnet);
-  trc("My IP address is: ");   
-  trc(String(Ethernet.localIP()));
-  
+  //Ethernet.begin(mac, ip, Dns, gateway, subnet);
+  trc("OpenMQTTGateway ip adress: ");   
+  Serial.println(Ethernet.localIP());
   trc(F("Ethernet connected"));
 }
 #endif

User_config.h

@@ -47,9 +47,9 @@ CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFT
 #endif
 
 const byte ip[] = { 192, 168, 1, 99 }; //ip adress
-// Advanced network config (optional) if you want to use these parameters uncomment line 158 and 172 of OpenMQTTGateway.ino
+// Advanced network config (optional) if you want to use these parameters uncomment line 158, 172 and comment line 171  of OpenMQTTGateway.ino
 const byte gateway[] = { 192, 168, 1, 1 }; //ip adress
-const byte dns[] = { 192, 168, 1, 1 }; //ip adress
+const byte Dns[] = { 192, 168, 1, 1 }; //ip adress
 const byte subnet[] = { 255, 255, 255, 0 }; //ip adress
 
 //Addons management, comment the line if you don't use