What to do? [Linux-works] built this I2C level converter to solve the problem. The circuit comes from an NXP app note (PDF) on the issue. You can take a quick peek at the suggested schematic from ...

The I2C bus requires pull-up resistors on both bus wires. 5volts is supplied to the pull-up resistors by connecting a wire from the 5volt supply to the pull-up resistor input terminal. Close the ...