It would be good to ask a moderator to move your post into a more appropriate forum, such the the Programming Questions...
And then post your code directly, using code tags. It will help people help you
It may be better to install the Adafruit library for that device since this:
Wire.write(simpleTab[lookup] >> 4); // the 8 most significant bits...
Wire.write((simpleTab[lookup] & 15) << 4); // the 4 least significant bits...
isn't doing what you think. Compare that to the adafruit library version