[JDNovak]

For the RoboRio, the I2C library changed to 7 bit addressing so the range is 1 to 128 instead of 2 to 254. The default address is 112 to the RoboRio.

The Arduino library uses 8 bit addressing.

I don't think this is officially documented anywhere.

For example I used the Arduino example code to set the address to 4 and then accessed the sensor on address 2 from the RoboRio.

The clock and data do need external 120 ohm pullups also.