//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <LiquidCrystal_I2C.h>
#define METER_WIDTH 13

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

uint8_t c0[8] = {16,16,16,16,16,0,31};
uint8_t c1[8] = {8,8,8,8,8,0,31};
uint8_t c2[8] = {4,4,4,4,4,0,31};
uint8_t c3[8] = {2,2,2,2,2,0,31};
uint8_t c4[8] = {1,1,1,1,1,0,31};
uint8_t c5[8] = {0,0,0,0,0,0,31};

void meter(int amt, int value)
{
  int space;
  int position;
  int fillspace;
  int i=0;
  char mstring[20];
  if(value > 5 * amt) lcd.print("out of range");
  else
    {
      space = value / 5;
      position = 1 + value % 5;
      fillspace = amt - space - 1;
      if(space)
        for(i=0;i < space;i++) 
        {
          mstring[i]='_';
        }
      mstring[i++]=position;
      
      fillspace += i;
      for(i;i<fillspace;i++) 
      {
        mstring[i]='_';
      }
    }
  lcd.print(mstring);
}
void setup()
{
  lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
  lcd.createChar(1, c0);
  lcd.createChar(2, c1);
  lcd.createChar(3, c2);
  lcd.createChar(4, c3);
  lcd.createChar(5, c4);
  lcd.createChar(6, c5);


  lcd.setCursor(0,1);
  lcd.print("                ");
   
}


void loop()
{
  int j=0;
  j=analogRead(A0);
  lcd.setCursor(0,0);
  lcd.print(j);
  lcd.print("     ");
   //delay(50);
   lcd.setCursor(1,1);
   lcd.print("2");
   lcd.setCursor(15,1);
   lcd.print("3");
   
   lcd.setCursor(2,1);
  meter(METER_WIDTH,map(j,0,1024,0,5 * METER_WIDTH));

}