#include <WiFi.h>
#include "PubSubClient.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4); 

float nhietdo;
float doam;
const char *MQTTServer = "broker.hivemq.com";  
const char *MQTT_Topic = "21004289/sunny";
const char *MQTT_Topicgui = "TranPhuongThuy/sunny";             
const char *MQTT_ID = "unique-client-id";     
int Port = 1883;



WiFiClient espClient;
PubSubClient client(espClient);


void setup() {
  pinMode(16, OUTPUT);
  lcd.init();                      
  lcd.backlight();
  Serial.begin(115200);
  WIFIConnect();
  client.setServer(MQTTServer, Port);
  client.setCallback(callback);
  digitalWrite(16, 1);
}

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

  String stMessage = "";
  lcd.setCursor(0, 0);
  for (int i = 0; i < length; i++) {
    Serial.print((char)message[i]);

    stMessage += (char)message[i];
  }
  // if (stMessage == "False") {
  //   lcd.setCursor(1, 0);
  //   lcd.print("NO OPEN");
  // }
  // else {
  //   lcd.setCursor(1, 0);
  //   lcd.print(stMessage);
  //   digitalWrite(16, 1);
  //   delay(2000);
  //   lcd.clear();
  //   digitalWrite(16, 0);
  }
  Serial.println();
}

void loop() {

  if (!client.connected()) {
    MQTT_Reconnect();
  }
  nhietdo = random(20,40);
  doam =  random(50,80);

  client.loop();
}