ESP32-Wrover Wifi & W5500 with MQTT

[asy508]

#include <Arduino.h>
#include <ArduinoMqttClient.h> 
#include <WiFi.h>  
#include <WiFiClientSecure.h> 
#include <AsyncTCP.h>      
#include <AsyncWebServer_ESP32_W5500.h>

#define MISO_GPIO   19
#define MOSI_GPIO   23
#define SCK_GPIO    18
#define CS_GPIO     22
#define INT_GPIO    21
#define SPI_CLOCK_MHZ 25

#define SECRET_SSID "myssid"
#define SECRET_PASS "mypwd"

WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);

const char broker[] = "broker.emqx.io";
int        port     = 1883;
const char topic[]  = "W5500";

const long interval = 1000;
unsigned long previousMillis = 0;

int count = 0;

void checkWifi()
{
  if(WiFi.status() != WL_CONNECTED)
  {
    WiFi.begin(SECRET_SSID,SECRET_PASS);
  }
  if(WiFi.status() == WL_CONNECTED)
  {
    Serial.println("Wifi conncted");
  }
}

void beginWiFi()
{
  Serial.print("Attempting to connect to WPA SSID: ");
  Serial.println(SECRET_SSID);
  WiFi.mode(WIFI_STA);
  WiFi.begin(SECRET_SSID,SECRET_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    // failed, retry
    Serial.print(".");
    delay(1000);
  }

  Serial.println("You're connected to the network");
  Serial.println();
}
void beginMqtt()
{
  if(!mqttClient.connect(broker,port))  
  {
    Serial.print("MQTT connection failed! Error code = ");
    Serial.println(mqttClient.connectError());
  }
  if(mqttClient.connected())  
  {
    Serial.println("Mqtt connected");
  }
}
    
void checkMqtt()
{
  if(!mqttClient.connected())
  {
    beginMqtt();
  }
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  byte mac[6] = {0XFE,0xED,0xBE,0xEF,0xFE,0xAA};
  beginWiFi();
  checkWifi();
  ESP32_W5500_onEvent();
  ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST, mac);
  //ESP32_W5500_waitForConnect();
   beginMqtt();
}

void loop() {
  // call poll() regularly to allow the library to send MQTT keep alives which
  // avoids being disconnected by the broker
  //checkWifi();
  checkMqtt();
  mqttClient.poll();

  // to avoid having delays in loop, we'll use the strategy from BlinkWithoutDelay
  // see: File -> Examples -> 02.Digital -> BlinkWithoutDelay for more info
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    // save the last time a message was sent
    previousMillis = currentMillis;

    Serial.print("Sending message to topic: ");
    Serial.println(topic);
    Serial.print("hello ");
    Serial.println(count);

    // send message, the Print interface can be used to set the message contents
    if(mqttClient.connected())
    {
      mqttClient.beginMessage(topic);
      mqttClient.print("hello ");
      mqttClient.print(count);
      mqttClient.endMessage();
    
      Serial.println();
    
      count++;
    }
  }
}

Hi,

I am using ESP32-wrover with W5500. My project is to use MQTT with Wifi or LAN connection.
I want to set LAN as mqtt connection priority, also is there any way to check internet availability and make mqtt connection based on internet status? I already try http request to google.com, but sometime its not return code 200.

Thanks