#include <LiquidCrystal.h>
#include <DHT.h>

#define DHTPIN         A1
#define sensor_lm35    A2
#define DHTTYPE        DHT22
#define RED_PIN        2
#define GREEN_PIN      3
#define BLUE_PIN       4

#define BuzzerPin      5
#define GasSensor     A0

float tempc;
float tempf;
float vout;
int gas = 0;

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
DHT dht(DHTPIN, DHTTYPE);

void print_gas_value(){
  gas = analogRead(GasSensor);

  int gasPercentage = map(gas, 0, 1023, 0, 100);

    lcd.setCursor(0, 0);
    lcd.println("GAS =");     
    lcd.print(gasPercentage);
    lcd.print(" %   ");

if (gasPercentage > 50) 
  {
    tone(BuzzerPin, 400, 1000);
    lcd.setCursor(0, 1);
    lcd.print("<< DANGER !!! >>");
  }
else
  {
    tone(BuzzerPin, 0, 250);
    lcd.setCursor(0, 1);
    lcd.print("<OUT OF DANGER.>"); 
  }
}

void print_temp_lm35(){

  vout = analogRead(sensor_lm35);
  vout = (vout*500)/1023;
  tempc = vout;
  tempf = (vout*1.8)+32;

  lcd.clear();
  lcd.print("C = ");
  lcd.println(tempc);
  lcd.setCursor(0,1);
  lcd.print("F = ");
  lcd.println(tempf);
}

void print_humidity_dh11(){
  // قراءة الرطوبة
  float h = dht.readHumidity();

  // عرض الرطوبة على شاشة الأردوينو
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.println("%");

  // عرض الرطوبة على شاشة LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print("%");

  // تحويل شدة الرطوبة إلى قيمة مناسبة لشدة الإضاءة
  
  if (h>70)
  {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  }
  else if (h>40)
  {
  digitalWrite(4, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);
  }
  else 
  {
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(2, LOW);
  }

}

void lcd_welcome_message(){
    lcd.clear();
    //delay(500);
  lcd.setCursor(9,0);
  lcd.write(byte(0));
  lcd.write(1);
  lcd.write(2);
  lcd.write(3);

   lcd.setCursor(8,0);
   lcd.write(4);
    //delay(500);
    lcd.setCursor(1, 0);
    lcd.print("HELLO");
    //delay(500);
    lcd.setCursor(0, 1);
    lcd.print("----");
    delay(500);
    lcd.setCursor(4, 1);
    lcd.print("----");
    delay(500);
    lcd.setCursor(8, 1);
    lcd.print("----");
    delay(500);
    lcd.setCursor(12, 1);
    lcd.print("----");
    delay(500);
    lcd.clear();
    delay(500);
    lcd.setCursor(0, 0);
    lcd.print("Air quality monitoring sensor detector");
    delay(500);

    
}

byte M[8] = {
0b00000,
0b00000,
0b00110,
0b01001,
0b11001,
0b00110,
0b00000,
0b00000
};
byte R[8] = {
0b00000,
0b00000,
0b00010,
0b00010,
0b00011,
0b00100,
0b01000,
0b10000
};
byte H[8] = {
0b00000,
0b01100,
0b10010,
0b00001,
0b11111,
0b00000,
0b00000,
0b00000
};
byte BA[8] = {
0b10000,
0b10000,
0b10000,
0b10010,
0b11111,
0b00000,
0b00100,
0b00000
};
byte logo[8] = {
0b11111,
0b10101,
0b11111,
0b11111,
0b01110,
0b01010,
0b11011,
0b00000,
};


void setup(){
  Serial.begin(9600);
  lcd.begin(16, 2);
  dht.begin();

  pinMode(BuzzerPin, OUTPUT);
  pinMode(sensor_lm35, INPUT);
  pinMode(GasSensor, INPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);

 lcd.createChar(0, BA); // char (با)
 lcd.createChar(1, H); //char ( ح )
 lcd.createChar(2, R); //char (ـر)
 lcd.createChar(3, M); //char (مـ)
 lcd.createChar(4, logo); 

    
  lcd_welcome_message();
  delay(1000);
  for (int positionCounter = 0; positionCounter < 22; positionCounter++) {
  lcd.scrollDisplayLeft();
  delay(150);}
} 

void loop() {
    lcd.clear();
  print_gas_value();
  delay(2000);
  lcd.clear();
  print_temp_lm35();
  delay(2000);
  lcd.clear();
  print_humidity_dh11();
  delay(2000);
 }