Improved reconnection

src/mqtt.h

@@ -21,7 +21,22 @@ class MQTTwrapper
 {
 
 private:
-    static MQTTwrapper *getInstance(MQTTwrapper *inst = nullptr)
+    const std::map<int, std::string> stateMap = {
+        {-4, "MQTT_CONNECTION_TIMEOUT"},
+        {-3, "MQTT_CONNECTION_LOST"},
+        {-2, "MQTT_CONNECT_FAILED"},
+        {-1, "MQTT_DISCONNECTED"},
+        {0, "MQTT_CONNECTED"},
+        {1, "MQTT_CONNECT_BAD_PROTOCOL"},
+        {2, "MQTT_CONNECT_BAD_CLIENT_ID"},
+        {3, "MQTT_CONNECT_UNAVAILABLE"},
+        {4, "MQTT_CONNECT_BAD_CREDENTIALS"},
+        {5, "MQTT_CONNECT_UNAUTHORIZED"}
+    };
+
+private:
+    static MQTTwrapper *
+    getInstance(MQTTwrapper *inst = nullptr)
     {
         static std::unique_ptr<MQTTwrapper> m_instance;
         if (inst)
@@ -37,6 +52,7 @@ public:
 
     const bool connect();
     const bool disconnect();
+    const bool connected();
 
     const bool subscribe(topic_t topic, action_t action);
     const bool unsubscribe(topic_t topic);