#include <WiFi.h>
#include <PubSubClient.h>
#include <DHTesp.h>
#include <ESP32Servo.h>
///////////////////////////////////////////////////////////////
const int DHT_PIN = 15;
DHTesp dht;
const char* ssid = "Wokwi-GUEST"; /// wifi ssid
const char* password = "";
const char* mqtt_server = "3.22.54.33";// server url
/////////////////////////////////////////////////////////////////
WiFiClient espClient;
PubSubClient client(espClient);
Servo servo;
int pinServo=21;
unsigned long lastMsg = 0;
float temp = 0;
float hum = 0;
String mensajeMQTT;
/////////////////////////////////////////////////////////////////////
void setup_wifi() {
delay(10);
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(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
//////////////////////////////////////////////////////////////////
void callback(char* topic, byte* payload, unsigned int length) {
 // Serial.print("Message arrived [");
 /// Serial.print(topic);
  //Serial.print("] ");
  mensajeMQTT = "";
  for (int i = 0; i < length; i++) {
    mensajeMQTT += (char)payload[i];
  }
  Serial.println(mensajeMQTT);
}

////////////////////////////////////////////////////////////////////
void reconnect() {
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
String clientId = "clientId-";
clientId += String(random(0xffff), HEX);
if (client.connect(clientId.c_str())) {
Serial.println("Connected");
client.publish("/ThinkIOT/Publish", "Welcome");
client.subscribe("/ThinkIOT/Subscribe");
client.subscribe("testtopic/actuador");
Serial.println("Estamos adentro muchachos");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
delay(5000);
}
}
}
/////////////////////////////////////////////////////////////////////
void setup() {
pinMode(2, OUTPUT);
Serial.begin(115200);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
dht.setup(DHT_PIN, DHTesp::DHT22);
servo.attach(pinServo, 500, 2500);
}
///////////////////////////////////////////////////////////////////
void loop(){
if (!client.connected()) {
reconnect();
}

client.loop();
unsigned long now = millis();
if (now - lastMsg > 2000) { //perintah publish data
lastMsg = now;
TempAndHumidity data = dht.getTempAndHumidity();
String temp = String(data.temperature, 2);
client.publish("testtopic/temperatura", temp.c_str()); // publish temp topic /ThinkIOT/temp
String hum = String(data.humidity, 1);
client.publish("testtopic/Humedad", hum.c_str()); // publish hum topic /ThinkIOT/hum
//Serial.print("Temperature: ");
//Serial.println(temp);
Serial.print("Humidity: ");
Serial.println(hum);
  servo.write(90);
  delay(1000);
  if(mensajeMQTT == "1"){
  servo.write(0);
   Serial.println("moviendo");
  delay(1500);
  servo.write(90);
   delay(1500);
  servo.write(179);
   delay(1500);
   Serial.println("Asegurando que la tapa quede bien cerrada");
  mensajeMQTT = "0";

    client.publish("testtopic/actuador","0");
  }

}
}