//Mata Kuliah :Mobile Internett Of Things Kelas C
// Tugas  : Broker MQTT mosquitto dengan NodeMCU ESP32
// Kelompok 9
#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define dhtPin 15 //Pin input DHT22
#define DHTTYPE DHT22 //Define tipe DHT

int ledPin = 14;                // pin untuk led
int inputPin = 12;               // pin untuk sensor pir
int pirState = LOW;             // kondisi saat pir LOW
int val = 0;                    // nilai awal pir

DHT dht(dhtPin, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 20, 4);

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

// Koneksi WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  // Memulai koneksi dengan wifi
  Serial.println();
  Serial.print("Menghubungkan ... ");
  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 Terhubung");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

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

  // Menghidupkan LED dengan nilai 1
  if ((char)payload[0] == '1') {
    digitalWrite(BUILTIN_LED, LOW);  

  } else {
    digitalWrite(BUILTIN_LED, HIGH);  // Mematikan LED dengan nilai HIGH
  }
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Menghubungkan ke MQTT...");
    // Create a random client ID
    String clientId = "ESP32-Kelompok9";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("Terhubung");
      // Once connected, publish an announcement...
      client.publish("MIOT/Kelompok-9", "Terhubung");
      // ... and resubscribe
      //client.subscribe("IoTK7");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in a seconds");
      delay(2500);
    }
  }
}

void setup() {
  pinMode(dhtPin, INPUT);
  pinMode(ledPin, OUTPUT);      // declare LED sebagai output
  pinMode(inputPin, INPUT);     // declare sensor sebagai input
  lcd.init();
  lcd.backlight();
  lcd.setBacklight(HIGH);

  pinMode(BUILTIN_LED, OUTPUT);  // LED_BUILTIN sebagai OUTPUT
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dht.begin();
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  unsigned long now = millis();

  // Membaca Sensor
  long k = dht.readHumidity();
  long s = dht.readTemperature();
  val = digitalRead(inputPin);  // membaca input value


  lcd.setCursor(0,0);
  lcd.print("Suhu : ");
  lcd.print(s);
  lcd.print(" Celsius");
  lcd.setCursor(0,1);
  lcd.print("Kelembaban : "); 
  lcd.print(k);
  lcd.println(" %");
  lcd.setCursor(0,3);
  lcd.print("Gerakan: ");
  // lcd.print(pirState);
  if (val == 1) {
    lcd.print("Terdeteksi!");
  } else {
    lcd.print("Aman...");
  }

    if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Gerakan terdeteksi!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Gerakan tidak ada!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }

  if (now - lastMsg > 3000) {
    lastMsg = now;
    ++value;
    snprintf(msg, MSG_BUFFER_SIZE, "Suhu = %ld°C, Kelembaban = %ldRH, Gerakan = %ld", s, k, val);
    Serial.print("Publish : ");
    Serial.println(msg);
    client.publish("MIOT/Kelompok-9", msg);
  }
}