MQTT Restaurant

MQTT_Restaurant.ino

#include <ESP8266WiFi.h>
#include <PubSubClient.h>

const char *ssid =  "__YOUR_WIFI_SSID__";
const char *pass =  "__YOUR_WIFI_PASSWORD__";

String MQTT_server("__YOUR_MQTT_SERVER__");
/* MQTT_clienId USE ONE NUMBER TO ONE BOARD EXAMPLE TABLE-1 NOT USE DOUBLE NUMBER TABLE OTHER BOARD */
String MQTT_clienId = "__NUMBER_TABLE__";
String MQTT_username = "__YOUR_MQTT_USERNAME__";
String MQTT_password = "__YOUR_MQTT_PASSWORD__";
String MQTT_topic = "__YOUR_MQTT_TOPIC";
int MQTT_port = 14878; // CHANGE YOUR PORT

int pushButton_Pin = 12;
int led_Pin = 14; 
int value = 0;

WiFiClient wclient;
PubSubClient client(wclient, MQTT_server, MQTT_port);

void setup() {
  Serial.begin(9600);
  pinMode(pushButton_Pin, INPUT);
  pinMode(led_Pin, OUTPUT);
}

void loop() {

  if (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    WiFi.begin(ssid, pass);
    Serial.print("Connecting to ");
    Serial.print(ssid);
    Serial.println();
    int RETRY_CONNECTION = 0;
    while (WiFi.status() != WL_CONNECTED) {
      if (RETRY_CONNECTION == 30) {
        Serial.print(".");
        RETRY_CONNECTION = 0;
      }
      delay(50);
      RETRY_CONNECTION++;
    }
    Serial.println();
    Serial.println("WiFi connected");
  }
  
  if (!client.connected()) {
      digitalWrite(led_Pin, 0);
      Serial.print("Connecting to MQTT server : ");
      Serial.print(MQTT_server);
      Serial.println();
    while (!client.connect(MQTT::Connect("ESP8266 TABLE " + MQTT_clientId).set_auth(MQTT_username, MQTT_password))) {
      Serial.print(".");
      delay(10);
    }
      Serial.println();
      Serial.print("ClientId : ");
      Serial.print(MQTT_clientId);
      Serial.println();
      Serial.print("Topic : ");
      Serial.print(MQTT_topic);
      Serial.println();
      Serial.println("Connected MQTT");
      Serial.println();
  } else {
      digitalWrite(led_Pin, 1);
      value = digitalRead(pushButton_Pin);

    while (value) {
      value = digitalRead(pushButton_Pin);
      if (value == LOW) {
        while (!client.publish(MQTT_topic, MQTT_clientId)) {
          delay(10);
        }
          Serial.print("Publish Data : ");
          Serial.print(MQTT_clientId);
          Serial.print(" -> ");
          Serial.print(MQTT_topic);
          Serial.println();
          Serial.println("==============================");
      }
      delay(50);
    }
    
  }
  
  if (client.connected()){
      delay(20);
      client.loop();
  }

}