added return codes. Try to publish. If it fails, run MQTT init and publish again. Increased Keep Alive timeout to make sure it is greater than the flow interval

code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp

@@ -32,9 +32,7 @@ void ClassFlowMQTT::SetInitialParameter(void)
     ListFlowControll = NULL; 
     disabled = false;
     MQTTenable = false;
-    
+    keepAlive = 600; // TODO This must be greater than the Flow Interval!
-    
-
 }       
 
 ClassFlowMQTT::ClassFlowMQTT()
@@ -125,15 +123,50 @@ bool ClassFlowMQTT::ReadParameter(FILE* pfile, string& aktparamgraph)
         printf("InitMQTTInit\n");
         mainerrortopic = maintopic + "/connection";
         printf("Init MQTT with uri: %s, clientname: %s, user: %s, password: %s, maintopic: %s\n", uri.c_str(), clientname.c_str(), user.c_str(), password.c_str(), mainerrortopic.c_str());
-        MQTTInit(uri, clientname, user, password, mainerrortopic, 60); 
+        if (!MQTTInit(uri, clientname, user, password, mainerrortopic, keepAlive))
-        if (MQTTPublish(mainerrortopic, "connected", SetRetainFlag)) {
+        { // Failed
-            MQTTenable = true;
+            MQTTenable = false;
-        }
+            return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
-        else {
-            MQTTenable = true;
         }
     }
 
+    // Try sending mainerrortopic. If it fails, re-run init
+    if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
+    { // Failed
+        LogFile.WriteToFile("MQTT - Re-running init...!");
+        if (!MQTTInit(this->uri, this->clientname, this->user, this->password, this->mainerrortopic, keepAlive))
+        { // Failed
+            MQTTenable = false;
+            return false;
+        } 
+    }
+
+    // Try again and quit if it fails
+    if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
+    { // Failed
+        MQTTenable = false;
+        return false;
+    }
+
+
+
+   
+ /*   if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
+    { // Failed
+        LogFile.WriteToFile("MQTT - Could not publish connection status!");
+        MQTTenable = false;
+        return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
+    }*/
+
+ /*   if(!MQTTPublish(_LWTContext, "", 1))
+    {
+        LogFile.WriteToFile("MQTT - Could not publish LWT!");
+        MQTTenable = false;
+        return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
+    }*/
+
+
+    MQTTenable = true;
     return true;
 }
 
@@ -146,18 +179,43 @@ string ClassFlowMQTT::GetMQTTMainTopic()
 
 bool ClassFlowMQTT::doFlow(string zwtime)
 {
-    if (!MQTTenable) {
+  //  if (!MQTTenable) {
-        LogFile.WriteToFile("MQTT not enabled!");
+  //      LogFile.WriteToFile("MQTT not enabled!");
+  //
+  //      // Try again to init it
+  //   if (!MQTTInit(this->uri, this->clientname, this->user, this->password, this->mainerrortopic, keepAlive))
+  //      { // Failed
+  //          MQTTenable = false;
+  //          return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
+  //      } 
+  //
+  //     if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
+  //      { // Failed
+  //          MQTTenable = false;
+  //          return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
+  //      }
+  //      
+  //      LogFile.WriteToFile("MQTT is now enabled");
+  //      MQTTenable = true;
+  //  }
 
-        // Try again to init it
+
-        MQTTInit(this->uri, this->clientname, this->user, this->password, this->mainerrortopic, 60); 
+    // Try sending mainerrortopic. If it fails, re-run init
-        if (MQTTPublish(mainerrortopic, "connected", SetRetainFlag)) {
+    if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
-            MQTTenable = true;
+    { // Failed
-        }
+        LogFile.WriteToFile("MQTT - Re-running init...!");
-        else { // Failed
+        if (!MQTTInit(this->uri, this->clientname, this->user, this->password, this->mainerrortopic, keepAlive))
+        { // Failed
+            MQTTenable = false;
             return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
         } 
-        LogFile.WriteToFile("MQTT is now enabled");
+    }
+
+    // Try again and quit if it fails
+    if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
+    { // Failed
+        MQTTenable = false;
+        return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
     }
 
     std::string result;
@@ -169,12 +227,10 @@ bool ClassFlowMQTT::doFlow(string zwtime)
     string zw = "";
     string namenumber = "";
 
-    if (MQTTPublish(mainerrortopic, "connected")) {
+    // if (!MQTTPublish(mainerrortopic, "connected", SetRetainFlag))
-        MQTTenable = true;
+    //{ // Failed, skip other topics
-    }
+    //    return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
-    else { // Failed, skip other topics
+    //}
-        return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
-    }
     
     zw = maintopic + "/" + "uptime";
     char uptimeStr[11];
@@ -184,7 +240,10 @@ bool ClassFlowMQTT::doFlow(string zwtime)
     zw = maintopic + "/" + "freeMem";
     char freeheapmem[11];
     sprintf(freeheapmem, "%zu", esp_get_free_heap_size());
-    MQTTPublish(zw, freeheapmem, SetRetainFlag);
+    if (!MQTTPublish(zw, freeheapmem, SetRetainFlag))
+    { // Failed, skip other topics
+        return true; // We need to return true despite we failed, else it will retry 5x and then reboot!
+    }
 
     zw = maintopic + "/" + "wifiRSSI";
     char rssi[11];

code/components/jomjol_flowcontroll/ClassFlowMQTT.h

@@ -15,6 +15,7 @@ protected:
     std::string user, password; 
     int SetRetainFlag;
     bool MQTTenable;
+    int keepAlive;
 
     std::string maintopic, mainerrortopic; 
 	void SetInitialParameter(void);        

code/components/jomjol_mqtt/interface_mqtt.cpp

@@ -20,22 +20,36 @@ bool mqtt_connected = false;
 esp_mqtt_client_handle_t client = NULL;
 
 bool MQTTPublish(std::string _key, std::string _content, int retained_flag){
-    if (!client) {
-        LogFile.WriteToFile("MQTT - client not initialized!");  
-        return false;      
-    }
   
-    if (!mqtt_connected) {
+  //  if (!client) {
-        LogFile.WriteToFile("MQTT - Can not publish, not connected!");
+  //      LogFile.WriteToFile("MQTT - client not initialized!");  
-        ESP_LOGW(TAG_INTERFACEMQTT, "Problem with Publish, client=%d, mqtt_connected %d", (int) client, (int) mqtt_connected);
+  //      return false;      
-        return false;            
+  //  }
+  //  LogFile.WriteToFile("MQTT - client initialized!");  // Debug
+  //
+  //  if (!mqtt_connected) {
+  //      LogFile.WriteToFile("MQTT - Can not publish, not connected!");
+  //      ESP_LOGW(TAG_INTERFACEMQTT, "Problem with Publish, client=%d, mqtt_connected %d", (int) client, (int) mqtt_connected);
+  //      return false;            
+  //  }
+  //  LogFile.WriteToFile("MQTT - connected!");  // Debug
+
+ /*   if (client && mqtt_connected) {
+        LogFile.WriteToFile("MQTT - connected!");  // Debug
     }
+    else { // init needed
+        if (!MQTTInit(this->uri, this->clientname, this->user, password, mainerrortopic, keepAlive)) // validate{
+        { // Failed
+            return false;
+        }
+    }*/
+
 
     int msg_id;
     std::string zw;
     msg_id = esp_mqtt_client_publish(client, _key.c_str(), _content.c_str(), 0, 1, retained_flag);
     if (msg_id < 0) {
-        LogFile.WriteToFile("MQTT - Failed to publish + " + _key + ", no connection!");
+        LogFile.WriteToFile("MQTT - Failed to publish '" + _key + "'!");
         return false;
     }
     zw = "MQTT - sent publish successful in MQTTPublish, msg_id=" + std::to_string(msg_id) + ", " + _key + ", " + _content;
@@ -102,7 +116,7 @@ static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_
 }
 
 
-void MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user, std::string _password, std::string _LWTContext, int _keepalive){
+bool MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user, std::string _password, std::string _LWTContext, int _keepalive){
     std::string _zwmessage = "connection lost";
 
     int _lzw = _zwmessage.length();
@@ -141,20 +155,30 @@ void MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user, st
     if (client)
     {
         if (esp_mqtt_client_register_event(client, esp_mmqtt_ID, mqtt_event_handler, client) != ESP_OK)
+        {
             LogFile.WriteToFile("MQTT - Could not register event!");
-        if (esp_mqtt_client_start(client) != ESP_OK)
+            return false;
-            LogFile.WriteToFile("MQTT - Could not start client!");
-
-        if(MQTTPublish(_LWTContext, "", 1)) {
-            LogFile.WriteToFile("MQTT - Client init successful");
         }
+        if (esp_mqtt_client_start(client) != ESP_OK)
+        {
+            LogFile.WriteToFile("MQTT - Could not start client!");
+            return false;
+        }
+
+       /* if(!MQTTPublish(_LWTContext, "", 1))
+        {
+            LogFile.WriteToFile("MQTT - Could not publish LWT!");
+            return false;
+        }*/
     }
     else
     {
         LogFile.WriteToFile("MQTT - Could not Init client!");
+        return false;
     }
 
-
+    LogFile.WriteToFile("MQTT - Init successful");
+    return true;
 }
 
 /*
@@ -256,7 +280,7 @@ void MQTTconnected(){
             }
         }
 
-        if (subscribeFunktionMap != NULL) {
+       if (subscribeFunktionMap != NULL) {
             for(std::map<std::string, std::function<bool(std::string, char*, int)>>::iterator it = subscribeFunktionMap->begin(); it != subscribeFunktionMap->end(); ++it) {
                 int msg_id = esp_mqtt_client_subscribe(client, it->first.c_str(), 0);
                 ESP_LOGD(TAG_INTERFACEMQTT, "topic %s subscribe successful, msg_id=%d", it->first.c_str(), msg_id);

code/components/jomjol_mqtt/interface_mqtt.h

@@ -5,7 +5,7 @@
 #include <map>
 #include <functional>
 
-void MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user, std::string _password, std::string _LWTContext, int _keepalive);
+bool MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user, std::string _password, std::string _LWTContext, int _keepalive);
 void MQTTdestroy();
 
 //void MQTTInit(std::string _mqttURI, std::string _clientid, std::string _user = "", std::string _password = "");