Boot phase: Add more error handling + provide verbose output in error cases (#2020)

* WLAN: add error handling

* WLAN: parameter global struct

* WLAN.ini -> more info text

* RSSIThreshold

* Rename logs

* Boot process: error handling

* Update texts

* Comments

* Init sequence

* Prepare for check dir creation

* add check makedir, update logs

* Blink code for OTA+SoftAP

* Blink code for missing time snyc

* Update

* reboot -> switch LED off

* Update log texts

* Update

* Update log texts

* create empty default folders at startup

* Update

* Adapt log level

* Print log level switch

* Update

* Update text

* Add SD free space to log

* WIFI/MQTT disconnect message set to WARN (+ ERROR)

code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp

@@ -5,6 +5,7 @@
 #include "ClassFlowMQTT.h"
 #include "Helper.h"
 #include "connect_wlan.h"
+#include "read_wlanini.h"
 #include "ClassLogFile.h"
 
 #include "time_sntp.h"
@@ -31,7 +32,7 @@ void ClassFlowMQTT::SetInitialParameter(void)
     topicError = "";
     topicRate = "";
     topicTimeStamp = "";
-    maintopic = hostname;
+    maintopic = wlan_config.hostname;
 
     topicUptime = "";
     topicFreeMem = "";