Add WiFi firmware version check

Author: pennam

src/ArduinoIoTCloudTCP.cpp

@@ -327,6 +327,12 @@ ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectMqttBroker()
   reconnection_retry_delay = min(reconnection_retry_delay, static_cast<unsigned long>(AIOT_CONFIG_MAX_RECONNECTION_RETRY_DELAY_ms));
   _next_connection_attempt_tick = millis() + reconnection_retry_delay;
 
+#if defined(ARDUINO_UNOWIFIR4)
+    if (String(WiFi.firmwareVersion()) < String("0.2.0")) {
+      DEBUG_ERROR("ArduinoIoTCloudTCP::%s In order to connect to Arduino IoT Cloud, WiFI firmware needs to be >= 0.2.0, current %s", __FUNCTION__, WiFi.firmwareVersion());
+    }
+#endif
+
   DEBUG_ERROR("ArduinoIoTCloudTCP::%s could not connect to %s:%d", __FUNCTION__, _brokerAddress.c_str(), _brokerPort);
   DEBUG_ERROR("ArduinoIoTCloudTCP::%s %d connection attempt at tick time %d", __FUNCTION__, _last_connection_attempt_cnt, _next_connection_attempt_tick);
   return State::ConnectPhy;