#include <DHT.h>
#include <WiFi.h>
#include "PubSubClient.h"

#define DHTPIN 5
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

const char * MQTTServer = "broker.emqx.io";
const char * MQTT_Topic = "THOM";

const char * MQTT_ID = "";
int Port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

void WIFIConnect() {
  Serial.println("Connecting to SSID: Wokwi-GUEST");
  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("WiFi connected");
  Serial.print(", IP address: ");
  Serial.println(WiFi.localIP());
}

void MQTT_Reconnect() {
  while (!client.connected()) {
    if (client.connect(MQTT_ID)) {
      Serial.print("MQTT Topic: ");
      Serial.print(MQTT_Topic);
      Serial.print(" connected");
      client.subscribe(MQTT_Topic);
      Serial.println("");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  dht.begin();
  WIFIConnect();
  client.setServer(MQTTServer, Port);
}

void loop() {
  delay(10);
  float tong = 0;
  for(int i = 0;i<3;i++){
    float t = dht.readTemperature();
    tong = tong+t;
    delay(1000);
  }
  float tb = tong/3;
  float h = dht.readHumidity();

  if (!client.connected()) {
    MQTT_Reconnect();
  }
  client.loop();

  String send = "{\"Nhietdo\":\""+String(tb)+"\",\"DoAm\":\""+String(h)+"\"}";
 
  client.publish("THOM",String(send).c_str());

}