MQTT Project-Hardware.py

#include <WiFi.h>
#include <PubSubClient.h>

const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";
const char* mqttServer = "YOUR_MQTT_BROKER_IP";
const int mqttPort = 1883;
const char* mqttUser = "YOUR_MQTT_USERNAME";
const char* mqttPassword = "YOUR_MQTT_PASSWORD";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
  }
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32Client", mqttUser, mqttPassword)) {
      // Subscription and publishing logic
    } else {
      delay(5000);
    }
  }
}

void setup() {
  setup_wifi();
  client.setServer(mqttServer, mqttPort);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}