ArduinoIoTCloudTCP: Use isTimeValid() to check NTP time

Author: pennam

src/ArduinoIoTCloudTCP.cpp

@@ -328,12 +328,13 @@ ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectPhy()
 
 ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_SyncTime()
 {
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-variable"
-  unsigned long const internal_posix_time = _time_service.getTime();
-#pragma GCC diagnostic pop
-  DEBUG_VERBOSE("ArduinoIoTCloudTCP::%s internal clock configured to posix timestamp %d", __FUNCTION__, internal_posix_time);
-  return State::ConnectMqttBroker;
+  if (TimeServiceClass::isTimeValid(getTime()))
+  {
+    DEBUG_VERBOSE("ArduinoIoTCloudTCP::%s internal clock configured to posix timestamp %d", __FUNCTION__, getTime());
+    return State::ConnectMqttBroker;
+  }
+
+  return State::ConnectPhy;
 }
 
 ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectMqttBroker()