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#define LCDCol 20
#define LCDRow 4
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
 
#define I2C_ADDR    0x3f
#define BACKLIGHT_PIN     3
#define En_pin  2
#define Rw_pin  1
#define Rs_pin  0
#define D4_pin  4
#define D5_pin  5
#define D6_pin  6
#define D7_pin  7
 
LiquidCrystal_I2C    lcd(I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin, BACKLIGHT_PIN, POSITIVE);