#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>
DHT dht(15,DHT22);
// Update these with values suitable for your network.

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";
float suhu;
int kelembaban;
#define LED1 2
#define LED2 16
#define LED3 17



WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE	(50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if((char)payload[0] == '1') {
    digitalWrite(LED1, HIGH); 
  } else {
    digitalWrite(LED1, LOW);
  }

  if((char)payload[1] == '1') {
    digitalWrite(LED2, HIGH); 
  } else {
    digitalWrite(LED2, LOW);
  }

  if((char)payload[2] == '1') {
    digitalWrite(LED3, HIGH); 
  } else {
    digitalWrite(LED3, LOW);
  }


}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish("MEDAN_MONITORING", "hello world");
      // ... and resubscribe
      client.subscribe("IN_MEDAN_MONITORING");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dht.begin();
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  kelembaban = dht.readHumidity();
  suhu = dht.readTemperature();

  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    ++value;
    snprintf (msg, MSG_BUFFER_SIZE, "DATA Sensor Suhu=%f, Kelembaban=%d", suhu,kelembaban);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("MEDAN_MONITORING", msg);
  }
}