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

#define DHTPIN A0
#define DHTTYPE DHT22
#define LED 13

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

const byte btn[] = {12, A3, A2, A1};
const byte buz[] = {11, 10, 0};
const byte seg[] = {2, 9, 6, 7, 8, 3, 4};

byte ledStates = 0;
byte n = 0;
bool b = false;

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.backlight();
  lcd.clear();

  pinMode(LED, OUTPUT);

  for (byte e : btn) pinMode(e, INPUT_PULLUP);
  for (byte e : buz) pinMode(e, OUTPUT);
  for (byte e : seg) {
    pinMode(e, OUTPUT);
    digitalWrite(e, HIGH);
  }

  lcd.setCursor(0, 0);
  lcd.print("Nama: Widya");
  lcd.setCursor(0, 1);
  lcd.print("NIM: 21650095");

  delay(1000);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  n = (n + 1) % 10;
  tampilAngka(n);

  lcd.clear();
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  if (b = !b) {
    tone(buz[1], 700);
    noTone(buz[0]);
  } else {
    tone(buz[0], 800);
    noTone(buz[1]);
  }

  if (temperature > 30) {
    digitalWrite(LED, HIGH);
    tone(buz[0], 200);
  } else {
    digitalWrite(LED, LOW);
    noTone(buz[0]);
  }

  delay(1000);
}

void tampilAngka(byte num) {
 switch (num) {
    case 1:
      nyalakan("BC");
      break;    
    case 2:
      nyalakan("ABDEG");
      break;    
    case 3:
      nyalakan("ABCDG");
      break;    
    case 4:
      nyalakan("BCFG");
      break;    
    case 5:
      nyalakan("ACDFG");
      break;    
    case 6:
      nyalakan("ACDEFG");
      break;    
    case 7:
      nyalakan("ABC");
      break;    
    case 8:
      nyalakan("ABCDEFG");
      break;    
    case 9:
      nyalakan("ABCDFG");
      break;    
    default:
      nyalakan("ABCDEF");
      break;
  }
}

void nyalakan(String l) {
  for (byte e : seg)
    digitalWrite(e, HIGH);

  for (char c : l)
    digitalWrite(seg[convertToNumber(c)], LOW);
}

void matikan() {
  for (byte e : seg) {
    digitalWrite(e, HIGH);
  }
}

int convertToNumber(char input) {
  switch (input) {
    case 'A': return 0;
    case 'B': return 1;
    case 'C': return 2;
    case 'D': return 3;
    case 'E': return 4;
    case 'F': return 5;
    default: return 6;
  }
}