#include <DHT.h>

#define DHTPIN 8
#define DHTTYPE DHT22

#define DATA_PIN 9
#define LATCH_PIN 10
#define CLOCK_PIN 11
#define NUM_SHIFT_REGS 3

DHT dht(DHTPIN, DHTTYPE);

const byte l[] = {6, 7};
const byte b[] = {2, 3, 4, 5};

float suhu_a = 0;
float lemb_a = 0;

const uint8_t angka[] = {
  //abcdefgh
  0b00000011, // 0
  0b00000011, // 0
  0b10011111, // 1
  0b00100101, // 2
  0b00001101, // 3
  0b10011001, // 4
  0b01001001, // 5
  0b01000001, // 6
  0b00011111, // 7
  0b00000001, // 8
  0b00001001, // 9
};

void setup() {
  Serial.begin(9600);
  dht.begin();

  pinMode(DATA_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(l[0], OUTPUT);
  pinMode(l[1], OUTPUT);

  for (byte i = 0; i < 4; i++)
    pinMode(b[i], OUTPUT);

  matikan7Seg();
  bersihkan();
  Serial.println("Nama : La Ode Muh. Adam Safitra");
  Serial.println("NIM : 21650122");
  delay(2000);
}

void loop() {
  // Membaca suhu dan kelembaban dari sensor DHT11
  float humidity = dht.readHumidity();
  float suhu = dht.readTemperature();

  // Menampilkan kelembaban di Seven Segment
  tampilAngka(humidity);

  // Menampilkan suhu dan kelembaban di Serial monitor
  cetakSuhu(suhu, humidity);

  // Menghidupkan LED biru dan buzzer 1 jika suhu di bawah 10°C
  if (suhu < 10) {
    digitalWrite(l[1], LOW);
    digitalWrite(l[0], HIGH);
    tone(b[0], 1000);
    delay(250);
    noTone(b[0]);
  }
  
  // Menghidupkan LED merah dan buzzer 4 jika suhu di atas 25°C
  if (suhu > 25) {
    digitalWrite(l[0], LOW);
    delay(200);
    digitalWrite(l[1], HIGH);

    tone(b[3], 294);
    delay(250);
    noTone(b[3]);
  } else {
    noTone(b[3]);
  }

  // Menghidupkan buzzer 2 jika kelembaban di atas 70%
  if (humidity > 70) {
    tone(b[1], 1200);
  } else {
    noTone(b[1]);
  }

  // Menghidupkan buzzer 3 dan 4 secara bergantian
  // jika suhu di atas 30°C dan kelembaban di bawah 50%
  if (suhu > 30 && humidity < 50) {
    while (
      (suhu = dht.readTemperature()) > 30 &&
      (humidity = dht.readHumidity()) < 50
    ) {
      cetakSuhu(suhu, humidity);
      tone(b[2], 1000);
      delay(300);
      noTone(b[2]);
      delay(100);
      tone(b[3], 500);
      delay(300);
      noTone(b[3]);
      delay(100);
    }
  } else {
    noTone(b[2]);
    noTone(b[3]);
  }
}

void cetakSuhu(float suhu, float lemb) {
  if ((suhu != suhu_a) || (lemb != lemb_a)) {
    suhu_a = suhu;
    lemb_a = lemb;

    Serial.print("Suhu: ");
    Serial.print(suhu);
    Serial.print(" °C , Kelembaban udara: ");
    Serial.print(lemb);
    Serial.println("%");
  }
}

void bersihkan() {
  for (int i = 0; i < 10; i++)
    Serial.println();
}

void tampilAngka(float num) {
  char n_[3];

  if (num < 100.0)
    dtostrf(num, 3, 1, n_);
  else
    dtostrf(num, 3, 0, n_);

  byte nn_ = String(n_).length();
  
  matikan7Seg();

  for (byte i = 0; i < nn_; i++) {
    byte angka_ = angka[n_[i] - '0'];

    if ((nn_ >= i+1) && (n_[i+1] == '.')) {
      angka_ &= 0b11111110;
      i++;
    }
      
    shiftOut(DATA_PIN, CLOCK_PIN, LSBFIRST, angka_);
  }

  digitalWrite(LATCH_PIN, HIGH); 
  digitalWrite(LATCH_PIN, LOW);
}

void matikan7Seg() {
  for (byte i = 0; i < NUM_SHIFT_REGS; i++)
    shiftOut(DATA_PIN, CLOCK_PIN, LSBFIRST, 0b11111111);

  digitalWrite(LATCH_PIN, HIGH); 
  digitalWrite(LATCH_PIN, LOW); 
}