/*****
Proyek Arduino dengan Simulator Wokwi
Judul     : Kipas Angin Otomatis dengan Sensor Suhu-Kelembaban.
Deskripsi : Kipas angin otomatis dg sensor suhu-kelembaban.
            Kipas angin akan hidup jika suda terasa panas, 27C
Dimodifikasi oleh : Yosep Prasetya Budi
Terakhir diedit : 29-08-2024	10:28
*****/

#include "DHT.h"
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define DHTPIN 2     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);

//Relay pin
byte relayPin = 3;
//Saklar pin
byte pb1Pin = 9;
byte pb2Pin = 8;

int buttonStatePb0 = 0; // nama variable status saklar Pb0
int buttonStatePb1 = 0; // nama variable status saklar Pb1
int lastButtonStatePb1 = 0; // previous state of the button

int setPoint = 50 ; // 50 cm

void setup () {
  Serial.begin(9600);
  
  //IO
  pinMode(relayPin, OUTPUT);
  pinMode(pb1Pin, INPUT_PULLUP);
  pinMode(pb2Pin, INPUT_PULLUP);
  digitalWrite(relayPin, LOW);
  digitalWrite(pb1Pin, HIGH);
  digitalWrite(pb2Pin, HIGH);
  // Init
  lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(3, 0);
  lcd.print("Hello, world!");
  lcd.setCursor(0, 1);
  lcd.print("Wokwi Online IoT");
  delay(1000);
  lcd.setCursor(0, 1);
  lcd.print("   Simulator    ");
  lcd.setCursor(0, 1);
  delay(1000);
  lcd.print("   Enjoy!      ");
  delay(2000);

  dht.begin();
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("KIPAS OTOMATIS");
  lcd.setCursor(3, 1);
  lcd.print("SYSTEM OFF");  
}

void loop () {
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true

  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {

    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // membaca nilai saklar Pb0 dan Pb1 (sensor digital)
  buttonStatePb0 = digitalRead(pb1Pin); 
  buttonStatePb1 = digitalRead(pb2Pin); 

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(F("Heat index: "));
  Serial.print(hic);
  Serial.println(F("°C "));

  // kunci kondisi Pb1 jika ON
  if(buttonStatePb1 == LOW) {
    lastButtonStatePb1 = HIGH;
  }

  if (buttonStatePb0 == HIGH) 
  {
    // check apakah tombol pushbutton ditekan
    if (lastButtonStatePb1 == HIGH) 
    {
        // start with a blank screen
        lcd.setCursor(0, 0);
        lcd.print("SUHU RUANG: ");
        lcd.setCursor(11, 0);
        lcd.print(t);
        //lcd.print(t("°C"));
        lcd.setCursor(0, 1);
        lcd.print("KELEMBABAN:");
        lcd.setCursor(11, 1);
        lcd.print(h);
        //lcd.print(h("%"));

        if( t > 32) {
          digitalWrite(relayPin, HIGH);
        } else
        {
          digitalWrite(relayPin, LOW);
        }
     }
  } else
    {
      //  
      lcd.clear(); //
      lcd.setCursor(1, 0);
      lcd.print("KIPAS OTOMATIS");
      lcd.setCursor(3, 1);
      lcd.print("SYSTEM OFF");
      // matikan Relay (off)
      digitalWrite(relayPin, LOW);
      lastButtonStatePb1 = LOW;
    }
    delay(500);
}