// Projek Kelompok C3
// Daffi, Bunga, Geo
// Monitoring Suhu dan Kelembapan

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

#define DHTPIN 8
#define DHTTYPE DHT22
#define buzzer 10
#define bluled 4
#define yelled 7
#define redled 2
const int switch_pin = 3;
const int RELAY_PIN = 6;

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(9600);
  Serial.println("Sistem Monitoring Suhu");
  Serial.print("Daffi, Geo, Bunga");
  lcd.begin(16, 2);
  dht.begin();
  lcd.backlight();
  
  pinMode(switch_pin, INPUT_PULLUP);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(bluled, OUTPUT);
  pinMode(yelled, OUTPUT);
  pinMode(redled, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  int switch_state=digitalRead(switch_pin);
  digitalWrite(RELAY_PIN, switch_state);  

  lcd.setCursor(0, 0);
  lcd.println("Suhu=");
  lcd.print(t);
  lcd.println(" C");
  lcd.setCursor(0, 1);
  lcd.println("Lembab=");
  lcd.print(h);
  lcd.println(" %");
  delay(500);
  lcd.clear();

  // Menyalakan LED built-in Arduino jika suhu mencapai ambang tertentu
   if (t < 18) {
    digitalWrite(bluled, HIGH);  // Menyalakan LED built-in Arduino
    digitalWrite(redled,LOW);
    digitalWrite(yelled,LOW);
    lcd.setCursor(4,0);
    lcd.println("Indikator");
    lcd.setCursor(3,1);
    lcd.print("Suhu Dingin"); 
    digitalWrite(buzzer, HIGH);
    tone(buzzer, 10);
    delay(750);
    digitalWrite(buzzer, LOW);
    noTone(buzzer);
  
  } else if (t >= 18 && t<= 25){
    digitalWrite(yelled, HIGH);
    digitalWrite(redled,LOW);
    digitalWrite(bluled,LOW);
    lcd.setCursor(4,0);
    lcd.println("Indikator");
    lcd.setCursor(3,1);
    lcd.print("Suhu Normal");
    delay(750);

  } else if (t > 25){
    digitalWrite(redled, HIGH); 
    digitalWrite(bluled,LOW);
    digitalWrite(yelled,LOW);
    lcd.setCursor(4,0);
    lcd.println("Indikator");
    lcd.setCursor(3,1);
    lcd.print("Suhu Panas");
    tone(buzzer, 20);
    delay(750);
    digitalWrite(buzzer, LOW);
    noTone(buzzer);
  }
}