#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 8
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  // put your setup code her, to run once:
  Serial.begin(115200);
  Serial.println("Economical And Smart Fan");
  lcd.begin(16, 2);
  dht.begin();
  pinMode(13, OUTPUT);

}

void loop() {
  //kelembapan
  float normal = 30;
  float dingin = 70;
  float kelembapan = dht.readHumidity();

  //suhu
  float rendah = 15;
  float tinggi = 35;
  float suhu = dht.readTemperature();

  //intensitas_kipas
  float mati  = 15;
  float hidup = 30;

  suhu        = 20;
  kelembapan  = 35;


  //kelembapan_normal
   float kelembapan_normal;
  if (kelembapan >= dingin) {
    kelembapan_normal = 0;
  } else if (normal < kelembapan && kelembapan < dingin){
    kelembapan_normal = (dingin - kelembapan) / (dingin - normal);
  } else if (kelembapan <= normal){
    kelembapan_normal = 1;
  }
  
  //kelembaban_dingin
  float kelembapan_dingin;
  if (kelembapan < normal) {
    kelembapan_dingin = 0;
  } else if (kelembapan >= normal && kelembapan <= dingin){
    kelembapan_dingin = (kelembapan - normal) / (dingin - normal);
  } else if (kelembapan > dingin){
    kelembapan_dingin = 1;
  }

  Serial.println("normal [kelembapan]: " + String(kelembapan_normal, 4));
  Serial.println("dingin [kelembapan]: " + String(kelembapan_dingin, 4));

  //suhu_rendah
  //suhu rendah
  float suhu_rendah;
  if (suhu >= tinggi) {
    suhu_rendah = 0;
  } else if (rendah < suhu && suhu < tinggi) {
    suhu_rendah = (tinggi - suhu) / (tinggi - rendah);
  } else if (suhu <= rendah) {
    suhu_rendah = 1;
  }

  //suhu tinggi
  float suhu_tinggi;
  if (suhu < rendah){
    suhu_tinggi = 0;
  } else if (suhu >= rendah && suhu <= tinggi) {
    suhu_tinggi = (suhu - rendah) / (tinggi - rendah);
  } else if (suhu > tinggi) {
    suhu_tinggi = 1;
  }

  Serial.println("rendah [suhu]: " + String(suhu_rendah, 4));
  Serial.println("tinggi [suhu]: " + String(suhu_tinggi, 4));

  //RULE [R1]
  float apredikat1 = min(kelembapan_normal, suhu_rendah);
  Serial.println("a predikat 1: " + String(apredikat1, 4));
  float z1 = hidup - apredikat1 * (hidup - mati);
  Serial.println("z1: " + String(z1, 4));

   //RULE [R2]
  float apredikat2 = min(kelembapan_dingin, suhu_rendah);
  Serial.println("a predikat 2: " + String(apredikat2, 4));
  float z2 = hidup - apredikat2 * (hidup - mati);
  Serial.println("z2: " + String(z2, 4));

   //RULE [R3]
  float apredikat3 = min(kelembapan_normal, suhu_tinggi);
  Serial.println("a predikat 3: " + String(apredikat3, 4));
  float z3 = apredikat3 * (hidup - mati) + mati;
  Serial.println("z1: " + String(z3, 4));

  //RULE [R4]
  float apredikat4 = min(kelembapan_dingin, suhu_tinggi);
  Serial.println("a predikat 4: " + String(apredikat4, 4));
  float z4 = apredikat4 * (hidup - mati) + mati;
  Serial.println("z1: " + String(z4, 4));

  //Nilai Z
  float z = (apredikat1 * z1 + apredikat2 * z2 + apredikat3 * z3 + apredikat4 * z4) /
             (apredikat1 + apredikat2 + apredikat3 + apredikat4);
  Serial.println("z: " + String(z, 4));

//Menampilkan di LCD
 lcd.setCursor(0, 0);
 lcd.println("Lembap=");
 lcd.print(kelembapan);
 lcd.println(" %");
 lcd.setCursor(0, 1);
 lcd.println("Suhu=");
 lcd.print(suhu);
 lcd.println(" C");
 delay(1500);
 lcd.clear();
 lcd.setCursor(0, 0);
 lcd.print("Intensitas Kipas: ");
 lcd.setCursor(0, 1);
 lcd.print(z);
 delay(1500);
 lcd.clear();

 if (z <= 25){
  digitalWrite(12, LOW);
  lcd.print("Kipas:");
  lcd.setCursor(0, 1);
  lcd.print("Mati");
 }
 else if(z >= 30){
  digitalWrite(12, HIGH);
  lcd.print("Kipas:");
  lcd.setCursor(0, 1);
  lcd.print("Hidup");
 }

 delay(3000);

 lcd.clear();

 delay(1000);
}