#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h>

const char* ssid = "Wokwi-GUEST";
const char* password = ""; // Isi dengan password WiFi Anda
const char* topic = "servo/control";

// MQTT broker details
const char* mqttServer = "mqtt-dashboard.com";
int mqttPort = 8884;

WiFiClient espClient;
PubSubClient client(espClient);
Servo myservo;

void setup_wifi() {
  delay(10);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void callback(char* topic, byte* payload, unsigned int length) {
  String msg = "";
  for (int i = 0; i < length; i++) {
    msg += (char)payload[i];
  }
  int angle = msg.toInt();
  myservo.write(angle);
}

void setup() {
  Serial.begin(115200);
  myservo.attach(18); // pin servo
  setup_wifi();
  client.setServer(mqttServer, mqttPort);
  client.setCallback(callback);
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32Client")) {
      client.subscribe(topic);
    } else {
      delay(5000);
    }
  }
}

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