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MQTT Project-Hardware.py

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+#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();
+}

MQTT Project-Software.py.py

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+import 'package:flutter/material.dart';
+import 'package:flutter_mqtt/mqtt_client.dart';
+
+void main() {
+  runApp(MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: MQTTScreen(),
+    );
+  }
+}
+
+class MQTTScreen extends StatefulWidget {
+  @override
+  _MQTTScreenState createState() => _MQTTScreenState();
+}
+
+class _MQTTScreenState extends State<MQTTScreen> {
+  MQTTClient mqttClient = MQTTClient();
+
+  @override
+  void initState() {
+    super.initState();
+    mqttClient.prepareClient();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('MQTT Mobile App'),
+      ),
+      body: Center(
+        child: ElevatedButton(
+          onPressed: () {
+            mqttClient.publishMessage('Topic', 'Message');
+          },
+          child: Text('Publish Message'),
+        ),
+      ),
+    );
+  }
+}