#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define LDR A0
#define LED 13
#define LED2 12
#define LED3 11
#define LED4 10
#define TRIG 3
#define ECHO 2
#define DHTpin A1
#define DHTtype DHT22

DHT dht(DHTpin, DHT22);
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(LDR, INPUT);
  pinMode(LED, OUTPUT);
  pinMode(ECHO, INPUT);
  pinMode(TRIG, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(5,0);
  lcd.print("PROJEK UTS");
  lcd.setCursor(2,1);
  lcd.print("Embedded System");
  lcd.setCursor(8,2);
  lcd.print("oleh");
  lcd.setCursor(1,3);
  lcd.print("Kelompok 7 PSTI-B");
  delay(3000);
  lcd.clear();

  lcd.setCursor(0,0);
  lcd.println("- Siti Nur Azizah");
  lcd.setCursor(0,1);
  lcd.println("- Yasmin Nurul S");
  lcd.setCursor(0,2);
  lcd.println("- Chandrika Gita P");
  lcd.setCursor(0,3);
  lcd.println("- M. Raja Haikal F");
  delay(3000);
  lcd.clear();

  Serial.println("- LED Kuning akan menyala, apabila arus cahaya yang ditangkap oleh LDR < 250 lumen (lm).");
  Serial.println("- LED Merah akan menyala, apabila suhu/temperatur yang ditangkap oleh DHT22 tidak di antara 15-22 C.");
  Serial.println("- LED Biru akan menyala, apabila kelembaban udara yang ditangkap oleh DHT22 tidak di antara 45-65 %.");
  Serial.println("- LED Hijau akan menyala, apabila distance suara yang ditangkap oleh HC-SR04 > 200 cm.");
}

void loop() {
  int nilaiLDR = analogRead(LDR);
  float nilaiHum = dht.readHumidity();
  float nilaiTemp = dht.readTemperature();
  digitalWrite(TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG, LOW);
  float distance = pulseIn(ECHO, HIGH);

  //Cahaya
  lcd.setCursor(0,0);
  lcd.print("Cahaya     : ");
  lcd.setCursor(13,0);
  lcd.print(nilaiLDR);
  lcd.setCursor(18,0);
  lcd.print("lm");
  //Suhu
  lcd.setCursor(0,1);
  lcd.print("Suhu       : ");
  lcd.setCursor(13,1);
  lcd.print(nilaiTemp);
  lcd.setCursor(19,1);
  lcd.print("C");
  //Kelembaban
  lcd.setCursor(0,2);
  lcd.print("Kelembaban : ");
  lcd.setCursor(13,2);
  lcd.print(nilaiHum);
  lcd.setCursor(19,2);
  lcd.print("%");
  //Suara
  lcd.setCursor(0,3);
  lcd.print("Suara      : ");
  lcd.setCursor(13,3);
  lcd.print(distance / 58 - 1);
  lcd.setCursor(18,3);
  lcd.print("cm");

  if(nilaiLDR < 500){
    digitalWrite(LED, HIGH);
  } else {
    digitalWrite(LED, LOW);
  }

  if(nilaiTemp >= 15 && nilaiTemp <= 22){
    digitalWrite(LED2, LOW);
  } else {
    digitalWrite(LED2, HIGH);
  }

  if(nilaiHum >= 45 && nilaiHum <= 65){
    digitalWrite(LED3, LOW);
  } else {
    digitalWrite(LED3, HIGH);
  }

  if(distance > 11600){
    digitalWrite(LED4, HIGH);
  } else {
    digitalWrite(LED4, LOW);
  }

  delay(500);
}