#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#define LDR_PIN 2

//DHT
#include <dht.h>
#define dataPin 7
dht DHT;


//LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;

//servo
Servo myservo;
Servo myservo2;

//NTC
const float BETA = 3950;

//lcd 20x4 i2c
LiquidCrystal_I2C lcd(0x27, 20, 4);

//PIR and LCD
int ledPin = 3;
int ledPin2 = 2;
int inputPin = 4;
int pirState = LOW;
int val = 0;

//bargrah
const int ledCount = 10;
int ledPins[] = {
  31, 33, 35, 37, 39, 41, 43, 45, 47, 49
};



void setup() {

  //LCD
  lcd.begin(16, 2);
  lcd.init();
  lcd.backlight();
  pinMode(LDR_PIN, INPUT);

  //servo
  myservo.attach(6);
  myservo2.attach(8);

  //buzzer
  pinMode(5, OUTPUT);
  Serial.begin(9600);

  //LED and PIR set up
  lcd.init();
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(inputPin, INPUT);

  //bargrah
  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    pinMode(ledPins[thisLed], OUTPUT);
  }


}

void loop() {

  // ค่าตัวแปรของ Temperature และ LUX
  int analogValue = analogRead(A0);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;

  lcd.setCursor(0, 1);
  lcd.print("Temperature: ");
  lcd.print(celsius);
  lcd.print(" C");

  if (lux >= 185) {
    if (myservo.read() != 180) {
      myservo.write(180);
      tone(5, 2000);
      delay(500);
      noTone(5);

    }
  } else {
    if (myservo.read() != 0) {
      myservo.write(0);
      tone(5, 1000);
      delay(500);
      noTone(5);
    }
  }

  // แสดงผลค่า LUX
  lcd.setCursor(0, 2);
  lcd.print("lux: ");
  lcd.print(lux);
  delay(100);

  //PIR Sensor
  val = digitalRead(inputPin);
  if (val == HIGH ) {
    digitalWrite(ledPin, HIGH);
    digitalWrite(ledPin2, HIGH);
    pirState = HIGH;
  } else {
    digitalWrite(ledPin, LOW);
    digitalWrite(ledPin2, LOW);
    pirState = LOW;

  }
  //DHT
  int readData = DHT.read22(dataPin);
  float t = DHT.temperature;
  float h = DHT.humidity;

  Serial.print("Temperature = ");
  Serial.print(t);
  Serial.print(" *C ");
  Serial.print("    Humidity = ");
  Serial.print(h);
  Serial.println(" % ");

  if (h <= 50) {
    if (myservo2.read() != 180) {
      myservo2.write(180);
      delay(500);
    }
  } else {
    if (myservo2.read() != 0) {
      myservo2.write(0);
      delay(500);
    }
  }

  //bargrah
  int sensorReading = analogRead(h);
  int ledLevel = map(sensorReading, 0, 1023, 0, ledCount);

  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    if (thisLed < ledLevel) {
      digitalWrite(ledPins[thisLed], HIGH);
    }
    else {
      digitalWrite(ledPins[thisLed], LOW);
    }
  }
  delay(1000);




}