#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h> 
Servo myservo; 

// Update these with values suitable for your network.
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

String my_payload;
String my_topic;
WiFiClient WOKWI_Client;
PubSubClient client(WOKWI_Client);

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  String conc_payload;
  for (unsigned int i = 0; i < length; i++) {
    conc_payload += (char)payload[i];
  }
  my_payload = conc_payload;
  my_topic = String(topic);
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
   
    if (client.connect("WOKWI_Client")) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.subscribe("ESP32_RECEBE");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(2, OUTPUT); 
  pinMode(15, OUTPUT); 
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  myservo.attach(18); 
}

void Conexao_WIFI() {
  if (WiFi.status() == WL_CONNECTED) {
    digitalWrite(2, HIGH);
  } else {
    digitalWrite(2, LOW);
  }
}

void Conexao_MQTT() {
  if (client.connected()) {
    digitalWrite(15, HIGH);
  } else {
    digitalWrite(15, LOW);
  }
}
//le valor do nodred
int Valor_Analogico; 
int Valor_Analogico_Anterior; 
 

void Analogico()
{
 
 Valor_Analogico = my_payload.toInt();
 if(Valor_Analogico!=Valor_Analogico_Anterior)
 {
 Valor_Analogico_Anterior=Valor_Analogico;
 Serial.println(Valor_Analogico);
 myservo.write(Valor_Analogico);
 delay(10);

}
}




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