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

#define LED1 25
#define LED2 26
#define LED3 27
#define SW   14

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* mqttServer = "mqtt.netpie.io";
const int mqttPort = 1883;

const char* clientID = "YOUR_DEVICE_CLIENT_ID";
const char* username = "YOUR_DEVICE_TOKEN";
const char* password_mqtt = "YOUR_DEVICE_SECRET";

WiFiClient espClient;
PubSubClient client(espClient);

// ===== Shadow topics =====
#define SHADOW_GET     "@shadow/get"
#define SHADOW_UPDATE  "@shadow/update"
#define SHADOW_UPDATED "@shadow/updated"

void callback(char* topic, byte* payload, unsigned int length) {
  StaticJsonDocument<256> doc;
  deserializeJson(doc, payload);

  if (doc.containsKey("state")) {
    bool led1 = doc["state"]["led1"];
    bool led2 = doc["state"]["led2"];
    bool led3 = doc["state"]["led3"];
    String mode = doc["state"]["mode"];

    digitalWrite(LED1, led1);
    digitalWrite(LED2, led2);
    digitalWrite(LED3, led3);

    if (mode == "off") {
      digitalWrite(LED1, LOW);
      digitalWrite(LED2, LOW);
      digitalWrite(LED3, LOW);
    }
  }
}

void connectMQTT() {
  while (!client.connected()) {
    if (client.con