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

byte lcdNumCols = 20; // -- number of columns in the LCD

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);   // -- creating LCD instance

// -- creating a 4 chars wide bars
LcdBarGraphX lbg0(&lcd, 4, 0, 0); // -- First line at column 0
LcdBarGraphX lbg1(&lcd, 4, 5, 0); // -- First line at column 5
LcdBarGraphX lbg2(&lcd, 4, 10, 0); // -- First line at column 10
LcdBarGraphX lbg3(&lcd, 4, 0, 1); // -- Second line at column 0
LcdBarGraphX lbg4(&lcd, 4, 5, 1);  // -- Second line at column 5
LcdBarGraphX lbg5(&lcd, 4, 10, 1); // -- Second line at column 0

byte i0 = 0;
byte i1 = 0;
byte i2 = 0;
byte i3 = 0;
byte i4 = 0;
byte i5 = 0;

void setup(){
  // -- initializing the LCD
  lcd.begin(4, lcdNumCols);
  lcd.clear();
  // -- do some delay: some time I've got broken visualization
  delay(100);
}

void loop()
{
  // -- draw bar graph from the analog value readed
  lbg0.drawValue( i0, 255);
  lbg1.drawValue( i1, 255);
  lbg2.drawValue( i2, 255);
  lbg3.drawValue( i3, 255);
  lbg4.drawValue( i4, 255);
  lbg5.drawValue( i5, 255);
  // -- do some delay: frequent draw may cause broken visualization
  delay(100);
  
  i0 += 5;
  i1 += 7;
  i2 += 9;
  i3 += 11;
  i4 += 13;
  i5 += 15;
}