add MQTT stuff

MqttClient.h

@@ -0,0 +1,38 @@
+/*
+ * MqttClient.h
+ *
+ *  Created on: 08.05.2015
+ *      Author: wn
+ */
+
+#ifndef MQTTCLIENT_H_
+#define MQTTCLIENT_H_
+
+#include <Ethernet.h>
+#include <PubSubClient.h>
+#include "mBusDialog.h"
+
+
+const String MQTT_BROKER = "172.16.2.16";
+const uint16_t MQTT_PORT = 1883;
+
+class MqttClient : public ResponseCallback {
+public:
+  MqttClient(RequestSender *meterBusMaster);
+  void begin();
+  void exec();
+  virtual void sendResponse(uint8_t *responseBuffer, uint16_t responseBufferLength);
+  virtual void sendError(uint8_t code);
+private:
+  EthernetClient m_client;
+  PubSubClient m_mqttClient;
+  RequestSender *m_meterBusMaster;
+  uint8_t m_disconnectState;
+  uint32_t m_disconnectTime;
+
+};
+
+
+
+
+#endif /* MQTTCLIENT_H_ */