#include <WiFi.h> //Import two new library
#include <PubSubClient.h>
#include "DHTesp.h"

#define WIFI_SSID "Wokwi-GUEST" //WIFI SSID NAME
#define WIFI_PW "" //WIFI PASSWORD
#define MQTT_BROKER "broker.hivemq.com" //MQTT BROKER IP
#define MQTT_PORT 1883 //MQTT BROKER PORT

const int DHT_PIN = 15;

WiFiClient espClient; // ESP8266 Wifi Client
PubSubClient client(espClient); // MQTT Client using the Wifi-Client
DHTesp dhtSensor;

void setup() {

  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  WiFi.begin(WIFI_SSID, WIFI_PW); // Start Wi-Fi connection

  while (WiFi.status() != WL_CONNECTED) { // Waiting for connection success
    delay(250);
    Serial.println(".");
  }
  Serial.println("Hello from ESP8266");
  Serial.print("Connected to hotspot: ");
  Serial.println(WIFI_SSID);
  Serial.print("IP address is: ");
  Serial.println(WiFi.localIP());
  Serial.println("-------------------------");

  client.setServer(MQTT_BROKER, MQTT_PORT); //Start MQTT connection
  client.setCallback(callback);
  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    if (client.connect("ESPGM", "GrigoriyMokrenko", "GrigoriyMokrenko" )) { //Sign in to the broker
      Serial.println("Connected to broker");
    } else {
      Serial.print("failed with state ");
      Serial.print(client.state());
      delay(2000);
    }
  }
    client.subscribe("GM-T");
    client.subscribe("GM-H");

}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 2) + "%");  


  if (!client.connected()) {
    Serial.println("No connected");;
  }
  client.loop();

  delay(2000);
  client.publish("GM-T", String(data.temperature, 2).c_str());
  client.publish("GM-H", String(data.humidity, 2).c_str());


}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived in topic: "); // Print out the topic
  Serial.print(topic);
  Serial.print("=");
  String stMessage;
  for (int i = 0; i < length; i++)
  {
    stMessage += (char)payload[i];
  }
  Serial.println(stMessage);
  Serial.println("-----------------------");
}