did it work with the Arduino sketch ?
if so what was the init command [I assume a0:2 are open]
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE) or LiquidCrystal_I2C lcd(0x27, 4, 5, 6, 0, 1, 2, 3, 7, NEGATIVE);
afaik there is at least two types there may be others.
if the addr is not between 0x20 and 0x27 then its a going to be different animal and the include files may need modification

would not hurt to trace out the cct and see what bits are wired to rs,e,rd/wr etc