initial w5500 support

networkDevices/WifiDevice.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <WiFiClient.h>
+#include "NetworkDevice.h"
+#include "../SpiffsCookie.h"
+
+class WifiDevice : public NetworkDevice
+{
+public:
+    WifiDevice(const String& hostname);
+
+    virtual void initialize();
+    virtual void reconfigure();
+
+    virtual bool isConnected();
+
+    virtual PubSubClient *mqttClient();
+
+private:
+    WiFiClient _wifiClient;
+    PubSubClient _mqttClient;
+    SpiffsCookie _cookie;
+};