* added mqtt

tools/esp8266/mqtt.h

@@ -0,0 +1,90 @@
+#ifndef __MQTT_H__
+#define __MQTT_H__
+
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include "defines.h"
+
+class mqtt {
+    public:
+        mqtt() {
+            mClient     = new PubSubClient(mEspClient);
+            mAddressSet = false;
+
+            memset(mUser,  0, MQTT_USER_LEN);
+            memset(mPwd,   0, MQTT_PWD_LEN);
+            memset(mTopic, 0, MQTT_TOPIC_LEN);
+        }
+
+        ~mqtt() {
+            delete mClient;
+        }
+
+        void setup(const char *broker, const char *topic, const char *user, const char *pwd) {
+            mAddressSet = true;
+            mClient->setServer(broker, 1883);
+
+            snprintf(mUser, MQTT_USER_LEN, "%s", user);
+            snprintf(mPwd, MQTT_PWD_LEN, "%s", pwd);
+            snprintf(mTopic, MQTT_TOPIC_LEN, "%s", topic);
+        }
+
+        void sendMsg(const char *topic, const char *msg) {
+            if(mAddressSet) {
+                uint8_t len = MQTT_TOPIC_LEN + strlen(msg);
+                char top[len];
+                snprintf(top, len, "%s/%s", mTopic, topic);
+
+                if(!mClient->connected())
+                    reconnect();
+                mClient->publish(top, msg);
+            }
+        }
+
+        bool isConnected(bool doRecon = false) {
+            if(doRecon)
+                reconnect();
+            return mClient->connected();
+        }
+
+        char *getUser(void) {
+            return mUser;
+        }
+
+        char *getPwd(void) {
+            return mUser;
+        }
+
+        char *getTopic(void) {
+            return mTopic;
+        }
+
+        void loop() {
+            //if(!mClient->connected())
+            //    reconnect();
+            mClient->loop();
+        }
+
+    private:
+        void reconnect(void) {
+            if(!mClient->connected()) {
+                String mqttId = "ESP-" + String(random(0xffff), HEX);
+                if((strlen(mUser) > 0) && (strlen(mPwd) > 0)) {
+                    mClient->connect(mqttId.c_str(), mUser, mPwd);
+                }
+                else {
+                    mClient->connect(mqttId.c_str());
+                }
+            }
+        }
+
+        WiFiClient mEspClient;
+        PubSubClient *mClient;
+
+        bool mAddressSet;
+        char mUser[MQTT_USER_LEN];
+        char mPwd[MQTT_PWD_LEN];
+        char mTopic[MQTT_TOPIC_LEN];
+};
+
+#endif /*__MQTT_H_*/