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

#define dhtpin 32
#define dhttype DHT22

DHT dht(dhtpin, dhttype);
String data_send;



const char * MQTTServer = "broker.empx.io";
const char * MQTT_Topic = "Phuc/MYSQL/DHT";


// Tạo ID ngẫu nhiên tại: https://www.guidgen.com/
const char * MQTT_ID = "John";
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 publishDHT22(){
  float temp = dht.readTemperature();
  float humid = dht.readHumidity();
  data_send = "{\"temp_value\": \"" + String(temp) + "\", \"humid_value\": \"" + String(humid) + "\", \"tb\": \"" + String(tongtemp) + "\"}";
  Serial.println(data_send);
  client.publish(MQTT_Topic, String(data_send).c_str());
}


void callback(char* topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.println(topic);
  Serial.print("Message: ");
  String stMessage;
}

void setup() {
  Serial.begin(115200);
  WIFIConnect();
  client.setServer(MQTTServer, Port);
  client.setCallback(callback);
  dht.begin();
}

void loop() {
  delay(10);
  if (!client.connected()) {
    MQTT_Reconnect();
  }
  publishDHT22();
  delay(1000);
  client.loop();
}