add MQTT stuff

MQTT/PubSubClient.h

@@ -0,0 +1,75 @@
+/*
+ PubSubClient.h - A simple client for MQTT.
+  Nicholas O'Leary
+  http://knolleary.net
+*/
+
+#ifndef PubSubClient_h
+#define PubSubClient_h
+
+#include <Arduino.h>
+#include "Client.h"
+
+// MQTT_MAX_PACKET_SIZE : Maximum packet size
+#define MQTT_MAX_PACKET_SIZE 256
+
+// MQTT_KEEPALIVE : keepAlive interval in Seconds
+#define MQTT_KEEPALIVE 15
+
+#define MQTTPROTOCOLVERSION 3
+#define MQTTCONNECT     1 << 4  // Client request to connect to Server
+#define MQTTCONNACK     2 << 4  // Connect Acknowledgment
+#define MQTTPUBLISH     3 << 4  // Publish message
+#define MQTTPUBACK      4 << 4  // Publish Acknowledgment
+#define MQTTPUBREC      5 << 4  // Publish Received (assured delivery part 1)
+#define MQTTPUBREL      6 << 4  // Publish Release (assured delivery part 2)
+#define MQTTPUBCOMP     7 << 4  // Publish Complete (assured delivery part 3)
+#define MQTTSUBSCRIBE   8 << 4  // Client Subscribe request
+#define MQTTSUBACK      9 << 4  // Subscribe Acknowledgment
+#define MQTTUNSUBSCRIBE 10 << 4 // Client Unsubscribe request
+#define MQTTUNSUBACK    11 << 4 // Unsubscribe Acknowledgment
+#define MQTTPINGREQ     12 << 4 // PING Request
+#define MQTTPINGRESP    13 << 4 // PING Response
+#define MQTTDISCONNECT  14 << 4 // Client is Disconnecting
+#define MQTTReserved    15 << 4 // Reserved
+
+#define MQTTQOS0        (0 << 1)
+#define MQTTQOS1        (1 << 1)
+#define MQTTQOS2        (2 << 1)
+
+class PubSubClient {
+private:
+   Client* _client;
+   uint8_t buffer[MQTT_MAX_PACKET_SIZE];
+   uint16_t nextMsgId;
+   unsigned long lastOutActivity;
+   unsigned long lastInActivity;
+   bool pingOutstanding;
+   void (*callback)(char*,uint8_t*,unsigned int);
+   uint16_t readPacket();
+   uint8_t readByte();
+   boolean write(uint8_t header, uint8_t* buf, uint16_t length);
+   uint16_t writeString(char* string, uint8_t* buf, uint16_t pos);
+   uint8_t *ip;
+   char* domain;
+   uint16_t port;
+public:
+   PubSubClient(Client& client);
+   PubSubClient(uint8_t *, uint16_t, void(*)(char*,uint8_t*,unsigned int),Client& client);
+   PubSubClient(char*, uint16_t, void(*)(char*,uint8_t*,unsigned int),Client& client);
+   boolean connect(char *);
+   boolean connect(char *, char *, char *);
+   boolean connect(char *, char *, uint8_t, uint8_t, char *);
+   boolean connect(char *, char *, char *, char *, uint8_t, uint8_t, char*);
+   void disconnect();
+   boolean publish(char *, char *);
+   boolean publish(char *, uint8_t *, unsigned int);
+   boolean publish(char *, uint8_t *, unsigned int, boolean);
+   boolean publish_P(char *, uint8_t PROGMEM *, unsigned int, boolean);
+   boolean subscribe(char *);
+   boolean loop();
+   boolean connected();
+};
+
+
+#endif