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

#define SOUND_SENSOR_PIN 34
#define BUZZER_PIN 27
#define LED_PIN 26

const int thresholdSound = 800;
const char* ssid = "Wokwi-GUEST";  // WiFi default di Wokwi
const char* password = "";         // No password untuk Wokwi-GUEST

const char* mqttServer = "broker.hivemq.com";
const int mqttPort = 1883;
const char* mqttTopic = "esp32/sound";

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);
  pinMode(SOUND_SENSOR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  // Koneksi WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected");

  // Koneksi MQTT
  client.setServer(mqttServer, mqttPort);
  connectToMQTT();
}

void connectToMQTT() {
  while (!client.connected()) {
    Serial.print("Connecting to MQTT...");
    if (client.connect("ESP32Client")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      delay(1000);
    }
  }
}

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

  int soundVal = analogRead(SOUND_SENSOR_PIN);
  Serial.print("Sound: ");
  Serial.println(soundVal);

  // Kirim data ke MQTT topic
  char msg[50];
  snprintf(msg, sizeof(msg), "Sound value: %d", soundVal);
  client.publish(mqttTopic, msg);

  if (soundVal > thresholdSound) {
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
  }

  delay(500);
}