#include <WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
 
///########### configuração do wifi
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Defining the WiFi channel speeds up the connection:
#define WIFI_CHANNEL 6
int status = WL_IDLE_STATUS;     // the Wifi radio's status
 
///########## configuração do MQTT
const char* mqtt_server = "test.mosquitto.org";// MQTT broker
char* my_topic_SUB = "FIT/SUB";// the chosen topic
char* my_topic_PUB = "FIT/PUB";// the chosen topic
 
/////##### configuração do wifi e MQTT
WiFiClient espClient;
PubSubClient client(espClient);
 
/////###configuração do tempo de leitura
int contador = 1;
char mensagem[30];
 unsigned long lastMillis = 0;
 
 
int PIR_SENSOR_PIN = 14; // Pino do sensor PIR (análogo)
int PIR_SENSOR_STATUS = 0; // Variável para armazenar o status do sensor
int ultimovalor=0;
int led= 12;

 
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(PIR_SENSOR_PIN, INPUT);
  pinMode(led, OUTPUT);
    conectawifi();
       client.setServer(mqtt_server, 1883); // Set the MQTT broker server and port
  client.setCallback(callback); // Set the callback function for incoming MQTT messages
 
 
}
 
void loop() {
  // put your main code here, to run repeatedly:
  delay(100); // this speeds up the simulation
  int movimento = sensor_movimento();
// Check MQTT connection and process incoming messages
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
 delay(100); // Add a delay to avoid flooding the MQTT broker with messages
 
  //Aguarda 15 segundos para enviar uma nova mensagem
   if (millis() - lastMillis > 10000) {
    lastMillis = millis();
    sprintf(mensagem, "%d", movimento);
    //sprintf(mensagem, "MQTT ESP32 - Mensagem no. %d", contador);  
  Serial.print("Mensagem enviada: ");
  Serial.println(mensagem);
 //Envia a mensagem ao broker
  client.publish(my_topic_PUB, mensagem);
  Serial.print(contador);
  Serial.println("-Mensagem enviada com sucesso...");
 
  //Incrementa o contador
  contador++;
 
    }
 
 
}
 
 
int sensor_movimento()
{
 PIR_SENSOR_STATUS = digitalRead(PIR_SENSOR_PIN);
 
  if(ultimovalor != PIR_SENSOR_STATUS )
  {
 
    Serial.print(PIR_SENSOR_STATUS);
    if(PIR_SENSOR_STATUS==1)
    {
      Serial.println(" - Movimento detectado");
      digitalWrite(led, HIGH);
    }
    else{
      Serial.println(" - Sem movimento");
      digitalWrite(led, LOW);
    }
 
    ultimovalor= PIR_SENSOR_STATUS;
  }
  return PIR_SENSOR_STATUS;
}
 
 
  void conectawifi()
  {
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD, WIFI_CHANNEL);
  Serial.print("Conectando ao WiFi ");
  Serial.print(WIFI_SSID);
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Conectado!");
 
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  }
 
  // Process incoming MQTT message and control the servo motor
void callback(char* topic, byte* payload, unsigned int length) {
  String string;
  Serial.print("Chegou a mensagem [");
  Serial.print(my_topic_SUB);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
     string+=((char)payload[i]);  
  }
  Serial.print(string);
 
}
// Attempt to reconnect to the MQTT broker if the connection is lost
void reconnect() {
  while (!client.connected()) {
    Serial.print("Tentando conectar ao MQTT ...");
    if (client.connect("ESPClient")) {
      Serial.println("Conectado");
      client.subscribe(my_topic_SUB);
    } else {
      Serial.print("falhou, rc=");
      Serial.print(client.state());
      Serial.println(" Tente novamente em 5 segundos");
     
     
  }
  }
}