// LCD MENGGUNAKAN I2C DENGAN SDA, SCL ADDRES 0X27
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// set the LCD addres to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);

// DEFINISI INPUT SWITC
#define SU 2
#define SD 7
#define SL 8
#define SR 9
#define ENTER 4

// DEFINISI INPUT ANALOG
#define POT1  A3
const byte IN[]={SU,SD,SL,SR,ENTER,POT1};

// DEFINISI OUTPUT BUZER
#define Buz1  3
// DEFINISI OUTPUT LED
#define LED1 5
#define LED2 6
#define LED3 10
#define LED4 11
#define LED5 12
#define LED6 13
const byte OUT[]={LED1,LED2,LED3,LED4,LED5,LED6,Buz1};

// VARIABEL YANG DI PERLUKAN
int NILAI = 0;
unsigned long t=0;
String Tombol;


void setup() {
  for(byte i=0;i<7;i++) pinMode(OUT[i],OUTPUT);
  for(byte i=0;i<6;i++) pinMode(IN[i],INPUT);

  lcd.begin(16,2);
  lcd.backlight();
  // MENULIS DI LCD PADA BARIS PERTAMA KOLOM PERTAMA
  lcd.setCursor(0, 0);
  lcd.print("== TES SISTEM ==");
  // MENULIS DI LCD PADA BARIS KEDUA KOLOM PERTAMA
  lcd.setCursor(0, 1);
  lcd.print("VAL:      SW:   ");
  

 t = millis();
 
}

void loop() {
  // put your main code here, to run repeatedly:
  
  if((millis()-t) < 500) 
  {
  return;
    
  }
      if (digitalRead(SU)==1)
    {
     Tombol ="UP  ";
    }
      else if (digitalRead(SD)== 1)
    {
     Tombol ="DOWN";
    }
      else if (digitalRead(SL)== 1)
    {
     Tombol ="LEFT";
    }
      else if (digitalRead(SR)== 1)
    {
     Tombol ="RIGH";
    }
      else if (digitalRead(ENTER)== 1)
    {
     Tombol ="ENTE";
    }
    else
    {
      Tombol ="   ";
    }
    
  NILAI = analogRead(POT1);
  byte OnOutput =map(NILAI,0,1023,0,6);
  nyalakanLed(OnOutput);
  
  // menampilkan angka di LCD dengan format
  char digit[4];
  sprintf(digit, "%04d", NILAI);
  lcd.setCursor(4, 1);      
  lcd.print(digit);

  lcd.setCursor(13, 1);
  lcd.print(Tombol);   
  delay(200);
}

void nyalakanLed(byte nyalaLED)
{
 for(byte i = 0;i<=nyalaLED;i++)
 {
  digitalWrite(OUT[i], HIGH);     //kondisi OUT ON
 }
  if (nyalaLED < 6)
  {for(byte i = nyalaLED;i<=6;i++)
   {
    digitalWrite(OUT[i], LOW);   // kondisi OUT OFF
  }
  }
 
}