[MQTT-TLS] Improve stability of MQTT connection while serving JSON pages

lib/lib_ssl/tls_mini/src/WiFiClientSecureLightBearSSL.cpp

@@ -297,6 +297,18 @@ void WiFiClientSecure_light::flush(void) {
 #endif
 
 #ifdef ESP32
+
+int WiFiClientSecure_light::connect(IPAddress ip, uint16_t port)
+{
+  return connect(ip, port, _timeout);
+}
+
+int WiFiClientSecure_light::connect(const char* name, uint16_t port) 
+{
+  return connect(name, port, _timeout);
+}
+
+
 int WiFiClientSecure_light::connect(IPAddress ip, uint16_t port, int32_t timeout) {
   DEBUG_BSSL("connect(%s,%d)", ip.toString().c_str(), port);
   clearLastError();

lib/lib_ssl/tls_mini/src/WiFiClientSecureLightBearSSL.h

@@ -45,8 +45,10 @@ class WiFiClientSecure_light : public NetworkClient {
     void allocateBuffers(void);
 
   #ifdef ESP32  // the method to override in ESP32 has timeout argument default #define WIFI_CLIENT_DEF_CONN_TIMEOUT_MS  (3000)
-    int connect(IPAddress ip, uint16_t port, int32_t timeout = 3000) override;
-    int connect(const char* name, uint16_t port, int32_t timeout = 3000) override;
+    int connect(IPAddress ip, uint16_t port) override;
+    int connect(const char* name, uint16_t port) override;
+    int connect(IPAddress ip, uint16_t port, int32_t timeout);
+    int connect(const char* name, uint16_t port, int32_t timeout);
   #else
     int connect(IPAddress ip, uint16_t port) override;
     int connect(const char* name, uint16_t port) override;

lib/pubsubclient/src/PubSubClient.cpp

@@ -458,6 +458,7 @@ bool PubSubClient::loop_read() {
 }
 
 boolean PubSubClient::loop() {
+    delay(0);
     loop_read();
     if (connected()) {
         unsigned long t = millis();

src/ESPEasy-Globals.cpp

@@ -11,7 +11,7 @@ boolean printToWebJSON = false;
 
 
 
-unsigned long timermqtt_interval = 250;
+unsigned long timermqtt_interval = 100;
 unsigned long lastSend = 0;
 unsigned long lastWeb = 0;
 

src/src/ESPEasyCore/Controller.cpp

@@ -254,6 +254,8 @@ bool MQTTConnect(controllerIndex_t controller_idx)
       mqtt.setTimeout(timeout); // in msec as it should be!
   #  endif // ifdef MUSTFIX_CLIENT_TIMEOUT_IN_SECONDS
       MQTTclient.setClient(mqtt);
+      MQTTclient.setKeepAlive(10);
+      MQTTclient.setSocketTimeout(timeout);
       break;
     }
 
@@ -357,6 +359,9 @@ bool MQTTConnect(controllerIndex_t controller_idx)
     mqtt_tls->setBufferSizes(1024, 1024);
     #  endif // ifdef ESP8266
     MQTTclient.setClient(*mqtt_tls);
+    MQTTclient.setKeepAlive(10);
+    MQTTclient.setSocketTimeout(timeout);
+
 
     if (mqttPort == 1883) {
       mqttPort = 8883;

src/src/ESPEasyCore/ESPEasy_setup.cpp

@@ -459,7 +459,7 @@ void ESPEasy_setup()
   }
 #endif
 
-  timermqtt_interval      = 250; // Interval for checking MQTT
+  timermqtt_interval      = 100; // Interval for checking MQTT
   timerAwakeFromDeepSleep = millis();
   CPluginInit();
   #ifndef BUILD_NO_RAM_TRACKER

src/src/Helpers/PeriodicalActions.cpp

@@ -365,10 +365,10 @@ void updateMQTTclient_connected() {
   if (!MQTTclient_connected) {
     // As suggested here: https://github.com/letscontrolit/ESPEasy/issues/1356
     if (timermqtt_interval < 30000) {
-      timermqtt_interval += 5000;
+      timermqtt_interval += 500;
     }
   } else {
-    timermqtt_interval = 250;
+    timermqtt_interval = 100;
   }
   Scheduler.setIntervalTimer(SchedulerIntervalTimer_e::TIMER_MQTT);
   scheduleNextMQTTdelayQueue();