/*
HOME Automation System:-- When the person enters in the house then PIR module detects then it 
activates all other sensors. After that when the temperature is above than 30-degree celcius then 
it activates the fan(as motor is not present in WOKWI. So, i had used the servo motor). And when 
the luminus intensity is less than 350-lux then Led will glow automatically. And there was a 
display which display all the data there for the user. And the person goes out of the house then 
it will automatically shutdown all the sensor to save the electricity.
*/
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Servo.h>

#define DHTPIN 2     
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);

const int PIR_PIN = 1;  
const int LDR_PIN = A0; 
const int LED_PIN = 3;  
const int SERVO_PIN = 5; 

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo myservo; 

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(PIR_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT); 
  
  lcd.init();
  lcd.backlight();
  lcd.clear();

  myservo.attach(SERVO_PIN); 
}

void loop() {
  int pirValue = digitalRead(PIR_PIN);
  int ldrValue = analogRead(LDR_PIN);
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("PIR: ");
  lcd.print(pirValue);
  lcd.setCursor(0, 1);
  lcd.print("LDR: ");
  lcd.print(ldrValue);
  
  if (ldrValue > 350) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
  
  if (temperature >= 30.0) {
    for (int pos = 0; pos <= 180; pos += 1) {
      myservo.write(pos);
      delay(15);
    }
    
    for (int pos = 180; pos >= 0; pos -= 1) {
      myservo.write(pos);
      delay(15);
    }
  } else {
    myservo.write(90); 
  }
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print(" %");
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  
  delay(2000); 
}




///// Code for proper funcutionation using PIR Sensor//////

// #include <LiquidCrystal_I2C.h>
// #include <DHT.h>
// #include <Servo.h>

// #define DHTPIN 2     
// #define DHTTYPE DHT22   
// DHT dht(DHTPIN, DHTTYPE);

// const int PIR_PIN = 1;  
// const int LDR_PIN = A0; 
// const int LED_PIN = 3;  
// const int SERVO_PIN = 5; 

// LiquidCrystal_I2C lcd(0x27, 16, 2);
// Servo myservo;  

// void setup() {
//   Serial.begin(9600);
//   dht.begin();
//   pinMode(PIR_PIN, INPUT);
//   pinMode(LDR_PIN, INPUT);
//   pinMode(LED_PIN, OUTPUT); 
  
//   lcd.init();
//   lcd.backlight();
//   lcd.clear();

//   myservo.attach(SERVO_PIN);  
// }

// void loop() {
//   int pirValue = digitalRead(PIR_PIN);

  // if (pirValue % 2 != 0) {
  //   int ldrValue = analogRead(LDR_PIN);
  //   float humidity = dht.readHumidity();
  //   float temperature = dht.readTemperature();
    
//     lcd.clear();
//     lcd.setCursor(0, 0);
//     lcd.print("PIR: ");
//     lcd.print(pirValue);
//     lcd.setCursor(0, 1);
//     lcd.print("LDR: ");
//     lcd.print(ldrValue);
    
//     if (ldrValue > 350) {
//       digitalWrite(LED_PIN, HIGH);
//     } else {
//       digitalWrite(LED_PIN, LOW);
//     }
    
//     if (temperature >= 30.0) {
//       for (int pos = 0; pos <= 180; pos += 1) {
//         myservo.write(pos);
//         delay(15);
//       }
      
//       for (int pos = 180; pos >= 0; pos -= 1) {
//         myservo.write(pos);
//         delay(15);
//       }
//     } else {
//       myservo.write(90);
//     }
    
//     lcd.clear();
//     lcd.setCursor(0, 0);
//     lcd.print("Humidity: ");
//     lcd.print(humidity);
//     lcd.print(" %");
//     lcd.setCursor(0, 1);
//     lcd.print("Temp: ");
//     lcd.print(temperature);
//     lcd.print(" C");
//   } else {
//     // If even or 0, deactivate all sensors
//     digitalWrite(LED_PIN, LOW);  // Turn off LED
//     myservo.write(90);  // Set servo to neutral position
//     lcd.clear();
//     lcd.setCursor(0, 0);
//     lcd.print("Sensors OFF");
//   }

//   delay(2000); 
// }