#include <PubSubClient.h>
#include <WiFi.h>
#include <DHT.h>  
DHT dht(18, DHT22);
WiFiClient  wifi;
PubSubClient  client(wifi);

void setup() {
  Serial.begin(115200);
  dht.begin();
  pinMode(19, OUTPUT);
  digitalWrite(19, LOW);
  konekwifi();
  client.setServer("mqtt-dashboard.com", 1883);
  client.setCallback(pesanmasuk);
}

void loop() {
  if (!client.connected()){
    konekmqtt();
  }
  client.loop();
  float suhu = dht.readTemperature();
  float kel = dht.readHumidity();
  Serial.println(suhu);
  Serial.println(kel);
  String t = String(suhu,1);
  String h = String(kel,1);
  client.publish("user/suhu",t.c_str(), true);
  client.publish("user/kelembapan",h.c_str(), true);
  delay(2000);
}

void konekwifi(){
  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED){
    Serial.println("Tunggu Sebentar..");
    delay(500);
  }
  Serial.println("WiFi Terhubung");
}

void konekmqtt(){
  while (!client.connected()) {
    client.connect("User-SmartFarming", "user/koneksi", 1, true, "OFFLINE");
  }
  Serial.println("MQTT Sudah Terhubung");
  client.publish("user/koneksi", "ONLINE");
  client.subscribe("user/led");
}

void pesanmasuk(char* topik, byte* pesan, unsigned int panjang){
  Serial.print("pesan masuk: ");
  Serial.println((char)pesan[0]);
  if(pesan[0] != '0'){
    digitalWrite(19, HIGH);
  }
  else{
    digitalWrite(19, LOW);
  }
}