ESP32 not connecting to MQTT Broker

Using Arduino Programming Questions
1

Hi. I'm currently working on a small project using ESP32 and MQTT. I'm new to MQTT so i'm having a little trouble solving this small part. Been looking for solutions but unable to resolve it still.

#include <M5Stack.h>
#include <Wire.h>
#include <Ethernet.h>
#include <WiFi.h>
#include <PubSubClient.h>

const char* ssid = "";
const char* password= "";

WiFiClient wclient;
PubSubClient client(wclient);

long tsLastReport = 0;
//Setup MQTT Client
const char *ID = "MyM5Device";
const char* topic="esp32/button";

IPAddress mqtt_server = (192,168,0,191);

void setup() {
  // put your setup code here, to run once:
  M5.begin();
  setup_wifi();
  client.setServer(mqtt_server,1883);
  delay(500);
  mqtt_connect();
  delay(500);
}

void setup_wifi(){
  WiFi.begin(ssid,password);

  while(WiFi.status() != WL_CONNECTED){
    Serial.println("WIFI CONNECTED");
    delay(500);
  }
}

void mqtt_connect(){
  if (client.connected()){
    return;
  }
  else{
    while(!client.connected()){
      if(client.connect(ID)){
        Serial.println("MQTT Connected");
        client.publish("esp32/button","HI THERE");
      }
      else{
        Serial.println("Attempt MQTT connection in another 5secs");
        delay(500);
      }
    }
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  M5.update();
  if (millis() - tsLastReport > 50000){
     String payload ="";
//     payload+="field1=";
//     payload+=HR;
//     payload+="&field2=";
//     payload+=SpO2;
//     payload+="field3=";
//     payload+=HRV;
//     payload+="&status=MQTTPUBLISH";
     if(client.connect(ID)){
      Serial.println("Connected for publishing");
     }
     if(client.publish(topic, (char*)payload.c_str())){
      Serial.println("Publish ok");
     }
  }
  tsLastReport = millis();
}

I've set up inbound rule on my firewall TCP port 1883 to allow connection.
I'm also using Node-Red to connect to the MQTT broker but its successful for that side but unable for my ESP32

Screenshot 2021-10-05 003424

I've set up my conf file but i'm a little unsure if i placed the listener 1883 and allow_anonymous true at that right place.

Please help me if i'm doing anything wrong. I just can't seem to find a solution

2

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