/*
Tugas Akhir:
SMART ROOM
- Pemantauan Suhu dan kelembaban (DHT22)
  Perubahhan suhu akan mempengaruhi nyala Kipas (FAN) (Relay)
  Jika suhu di atas 25 derajat celcius maka FAN akan menyala
- Motion Detection (PIR)
  Ketentuan:
  Ketika ada pergerakan terdeteksi, maka Lampu PUtih Akan menyala
- Lampu Penerangan (LED)
  Lampu akan menyala jika ada pergerakan, 
  dan bisa di nyalakan menggunakan IoT MQTT Panel
- Kipas Angin (FAN)(Relay)
  Pada simulasi ini menggunakan Relay 
  yang nanti sebagai saklar untuk menyalakan kipas angin

  Ketentuan:
  Jika Suhu diatas 25 derajat maka kipas menyala
  Jika dibawah 25 maka kipas mati
- Ketinggian Sampah di bak sampah
  dengan ketentuan:
  Jika Jarak < 5 cm (LED MERAH ON) (Sudah Hampir penuh, saatnya membuang)
  Jika Jarak <= 15 cm (LED Kuning ON) (warning)
  Jika Jarak > 15 cm (LED Hijau ON) (Tempat sampah masih cukup Lega)
*/
#include <WiFi.h>
#include <MQTT.h>
#include "DHT.h"

const char ssid[] = "Wokwi-GUEST";
const char pass[] = "";

WiFiClient net;
MQTTClient client;

#define DHT22Pin 5

#define fanKipas 27
#define lampuRuangan 26

int inputPin = 14;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;

DHT dht(DHT22Pin, DHT22);

const int trigPin = 23;
const int echoPin = 22;

long duration;
int distance;

unsigned long lastMillis = 0;

String _statusLampu = "OFF";
String _statusFAN = "OFF";
String _statuspirState = "OFF";
int L_statusLampu = 0;
int L_statusFAN = 0;

void connect(){
  // Menghubungkan ke WiFi
  Serial.print("Cek WiFi");
  while(WiFi.status() != WL_CONNECTED){
    Serial.print(".");
    delay(1000);
  }
  Serial.println("");
  Serial.println("Sukses Terhubung ke WiFi");

  // Menghubungkan ke Broker
  Serial.print("Cek Broker");
  while(!client.connect("")){ // Client ID boleh dikosongkan
    Serial.print(".");
    delay(1000);
  }
  Serial.println("");
  Serial.println("Sukses Terhubung ke Server");
  
  client.subscribe("ben/iot/#", 1); // subcribe dengan QoS 1
}

void subscribeData(String &topic, String &data){
  Serial.print("Topic: ");
  Serial.println(topic);
  Serial.print("Data: ");
  Serial.println(data);

  if(topic == "ben/iot/Lampu"){  
    if(data == "1"){
      _statusLampu = "ON";
      L_statusLampu = 1;
    } else {
      _statusLampu = "OFF";
      L_statusLampu = 0;
    }

    digitalWrite(lampuRuangan, data.toInt());   //control
  }

  if(topic == "ben/iot/FAN"){
    if(data == "1"){
      _statusFAN = "ON";
      L_statusFAN = 1;
    } else {
      _statusFAN = "OFF";
      L_statusFAN = 0;
    }
    
    digitalWrite(fanKipas, data.toInt());   //control
  }
}

void publish(){
  float hum = dht.readHumidity();
  float temp = dht.readTemperature();
  Serial.print("Temperature : ");
  Serial.print(temp);
  Serial.print(" C ");

  Serial.print("Humidity : ");
  Serial.print(hum);
  Serial.println(" % ");

  ultrasonic();

  // Logic Kipas Angin
  if(temp > 25){
    _statusFAN = "ON";
    L_statusFAN = 1;
    digitalWrite(fanKipas, HIGH);
  } else {
    _statusFAN = "OFF";
    L_statusFAN = 0;    
    digitalWrite(fanKipas, LOW);
  }

  // variabel kondisi LED
  int jarak_hijau = 0;
  int jarak_kuning = 0;
  int jarak_merah = 0;

  // Set Level ke LED
  if(distance < 5){
    jarak_merah = 1;
  } else if(distance <= 15){
    jarak_kuning = 1;
  } else if(distance > 15){
    jarak_hijau = 1;
  }

  pir();

  client.publish("ben/iot/dht/temp", String(temp), true, 1); // publish variabel temperatue ke topic ben/iot/dht/temp dengan QoS 1
  client.publish("ben/iot/dht/humi", String(hum), true, 1); // publish variabel humidity ke topic ben/iot/dht/humi dengan QoS 1
  client.publish("ben/iot/us/cm", String(distance), true, 1); // publish variabel humidity ke topic ben/iot/dht/humi dengan QoS 1
  client.publish("ben/iot/Lampu/kondisi", String(L_statusLampu), true, 1); // publish variabel humidity ke topic ben/iot/Lampu/status dengan QoS 1
  client.publish("ben/iot/FAN/kondisi", String(L_statusFAN), true, 1); // publish variabel humidity ke topic ben/iot/FAN/status dengan QoS 1
  client.publish("ben/iot/Lampu/status", String(_statusLampu), true, 1); // publish variabel humidity ke topic ben/iot/Lampu/status dengan QoS 1
  client.publish("ben/iot/FAN/status", String(_statusFAN), true, 1); // publish variabel humidity ke topic ben/iot/FAN/status dengan QoS 1
  client.publish("ben/iot/pirState/status", String(_statuspirState), true, 1); // publish variabel humidity ke topic ben/iot/pirState/status dengan QoS 1

  // Publish kondisi LED sesuai Level
  client.publish("ben/iot/us/cm/hijau", String(jarak_hijau), true, 1);
  client.publish("ben/iot/us/cm/kuning", String(jarak_kuning), true, 1);
  client.publish("ben/iot/us/cm/merah", String(jarak_merah), true, 1);
}

void ultrasonic()
{
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.println(distance);
}

void pir()
{
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(lampuRuangan, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      // We only want to print on the output change, not state
      pirState = HIGH;
      _statuspirState = "ON";
      _statusLampu = "ON";
      L_statusLampu = 1;
    }
  } else {
    digitalWrite(lampuRuangan, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
      _statuspirState = "OFF";
      _statusLampu = "OFF";
      L_statusLampu = 0;
    }
  }
}


void setup() {
  Serial.begin(115200);
  pinMode(fanKipas,OUTPUT); 
  pinMode(lampuRuangan,OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(inputPin, INPUT);     
  dht.begin();

  Serial.begin(9600);
  WiFi.begin(ssid, pass);
  client.begin("broker.emqx.io", net);
  client.onMessage(subscribeData); 
  connect();
}

void loop() {
  client.loop();
  // publish a message roughly every second.
  if (millis() - lastMillis > 500) {
    lastMillis = millis();
    publish();
  }
  
  delay(10);
}