//Nama : M FAJAR RAFLI
//NIM : 191020100016
//Kelas :7A1
// LCD1602 to Arduino Uno connection example

#include <LiquidCrystal.h>
#include "DHT.h"
#include "Servo.h" // Bibliothek für Servos laden

#define DHT_PIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
#define LDR_PIN 2
#define SPEAKER_PIN 4

DHT dht(DHT_PIN, DHTTYPE);
Servo myservo;
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;
int val;    

void setup() {
    pinMode(LDR_PIN, INPUT);
 Serial.begin(9600);
  lcd.begin(16, 2);
  dht.begin();
  lcd.setCursor(5,0);lcd.print("Arduino");
  lcd.setCursor(3,1);lcd.print("T+H Monitor");
  delay(2000);
  lcd.clear();
  pinMode(SPEAKER_PIN, OUTPUT);
 myservo.attach(5);  // attaches the servo on pin 9 to the servo object
  
}

void loop() {
   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));

  lcd.setCursor(2, 0);
  lcd.print("Lux: ");
  lcd.print(lux);
  lcd.print("          ");

  delay(100);
  int ldrStatus = analogRead(LDR_PIN);
if (lux >= 400) {
tone(SPEAKER_PIN, 100);
noTone(SPEAKER_PIN);
 delay(100);
Serial.println("----------- ALARM ACTIVATED -----------");
}
else {
noTone(SPEAKER_PIN);
Serial.println("ALARM DEACTIVATED");
}
delay(100);
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Check if any reads failed and exit early (to try again).
  int err;
  if (isnan(h) || isnan(t) ) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Serial.print(t); //Temperature data
  Serial.print(",");//Data splitter
  Serial.println(h); //Humidity data 
  lcd.clear();
  lcd.setCursor(0,1);lcd.print("T:");lcd.print(t);
  lcd.print(" C");//LCD line 1 print temperature
  lcd.setCursor(9,1);lcd.print("H:");lcd.print(h);
  lcd.print(" %");//LCD line 2 print Humidity
  
 val = dht.readTemperature();            // reads the value of the potentiometer (value between 0 and 1023)
  myservo.write(val);                  // sets the servo position according to the scaled value
  delay(15);
}