More stability: MQTT Publish suppressed if input Loop invoked from ethernet Idle (reentrance issue? low-memory for stack?)

Side effects - some MQTT publishings may lost
Watchdog enabled when MQTT connection pending

lighthub/main.cpp

@@ -151,6 +151,7 @@ aJsonObject *pollingItem = NULL;
 
 bool owReady = false;
 bool configOk = false;
+int8_t ethernetIdleCount =0;
 
 #ifdef _modbus
 ModbusMaster node;
@@ -170,20 +171,32 @@ void watchdogSetup(void) {}    //Do not remove - strong re-definition WDT Init f
 
 void cleanConf()
 {
-  root   = NULL;
+  if (!root) return;
+debugSerial<<F("Deleting conf. RAM was:")<<freeRam();
+    aJson.deleteItem(root);
+    root   = NULL;
+
+  //aJson.deleteItem(inputs);
   inputs = NULL;
+  //aJson.deleteItem(items);
   items  = NULL;
+  //aJson.deleteItem(topics);
   topics = NULL;
+  //aJson.deleteItem(mqttArr);
   mqttArr = NULL;
   #ifndef DMX_DISABLE
+  //aJson.deleteItem(dmxArr);
   dmxArr = NULL;
   #endif
   #ifndef OWIRE_DISABLE
+  //aJson.deleteItem(owArr);
   owArr = NULL;
   #endif
   #ifndef MODBUS_DISABLE
+  //aJson.deleteItem(modbusArr);
   modbusArr = NULL;
   #endif
+     debugSerial<<F(" is ")<<freeRam()<<endl;
 }
 
 void mqttCallback(char *topic, byte *payload, unsigned int length) {
@@ -555,11 +568,11 @@ void ip_ready_config_loaded_connecting_to_broker() {
 
 
         debugSerial<<F("\nAttempting MQTT connection to ")<<servername<<F(":")<<port<<F(" user:")<<user<<F(" ...");
-        wdt_dis();  //potential unsafe for ethernetIdle(), but needed to avoid cyclic reboot if mosquitto out of order
+        //    wdt_dis();  //potential unsafe for ethernetIdle(), but needed to avoid cyclic reboot if mosquitto out of order
         if (mqttClient.connect(deviceName, user, password,willTopic,MQTTQOS1,true,willMessage)) {
             mqttErrorRate = 0;
             debugSerial<<F("connected as ")<<deviceName <<endl;
-            wdt_en();
+        //    wdt_en();
             configOk = true;
             // ... Temporary subscribe to status topic
             char buf[MQTT_TOPIC_LENGTH];
@@ -776,7 +789,7 @@ void Changed(int i, DeviceAddress addr, float currentTemp) {
             char valstr[50];
             sprintf(valstr, "{\"idx\":%s,\"svalue\":\"%.1f\"}", idx->valuestring, currentTemp);
             debugSerial << valstr;
-            if (mqttClient.connected())
+            if (mqttClient.connected() && !ethernetIdleCount)
                   mqttClient.publish(owEmitString, valstr);
             return;
         }
@@ -785,7 +798,7 @@ void Changed(int i, DeviceAddress addr, float currentTemp) {
             //strcpy_P(addrstr, outprefix);
             setTopic(addrstr,sizeof(addrstr),T_OUT);
             strncat(addrstr, owEmitString, sizeof(addrstr));
-            if (mqttClient.connected())
+            if (mqttClient.connected() && !ethernetIdleCount)
                   mqttClient.publish(addrstr, valstr);
         }
         // And translate temp to internal items
@@ -944,6 +957,7 @@ void printConfigSummary() {
     printBool(udpSyslogArr);
 #endif
     debugSerial << endl;
+    debugSerial<<F("RAM=")<<freeRam()<<endl;
 }
 
 void cmdFunctionLoad(int arg_cnt, char **args) {
@@ -960,7 +974,6 @@ int loadConfigFromEEPROM()
     ch = EEPROM.read(EEPROM_offset);
     if (ch == '{') {
         aJsonEEPROMStream as = aJsonEEPROMStream(EEPROM_offset);
-        aJson.deleteItem(root);
         cleanConf();
         root = aJson.parse(&as);
         if (!root) {
@@ -1163,7 +1176,7 @@ lan_status loadConfigFromHttp(int arg_cnt, char **args)
     //HTTPClient hclientPrint(configServer, 80);
     // FILE is the return STREAM type of the HTTPClient
     configStream = hclient.getURI(URI);
-    Serial.println("got--");delay(500);
+    //Serial.println("got--");delay(500);
     responseStatusCode = hclient.getLastReturnCode();
     wdt_en();
 
@@ -1174,7 +1187,6 @@ lan_status loadConfigFromHttp(int arg_cnt, char **args)
             char c;
             aJsonFileStream as = aJsonFileStream(configStream);
             noInterrupts();
-            aJson.deleteItem(root);
             cleanConf();
             root = aJson.parse(&as);
             interrupts();
@@ -1237,7 +1249,6 @@ lan_status loadConfigFromHttp(int arg_cnt, char **args)
     //debugSerial<<"GET Response: ");
 
     if (responseStatusCode == 200) {
-        aJson.deleteItem(root);
         cleanConf()
         root = aJson.parse((char *) response.c_str());
 
@@ -1270,7 +1281,6 @@ lan_status loadConfigFromHttp(int arg_cnt, char **args)
         if (httpResponseCode == HTTP_CODE_OK) {
             String response = httpClient.getString();
             debugSerial<<response;
-            aJson.deleteItem(root);
             cleanConf()
             root = aJson.parse((char *) response.c_str());
             if (!root) {
@@ -1601,8 +1611,10 @@ void owIdle(void) {
 #endif
 }
 void ethernetIdle(void){
+ethernetIdleCount++;
     wdt_res();
     inputLoop();
+ethernetIdleCount--;
 };
 
 void modbusIdle(void) {