At the time of writing, in order to use the I2C bus that the display uses, the Raspbian Wheezy distribution requires that you issue a few commands to make the I2C bus accessible to the Python program we are going to write. It is likely that later releases of Raspbian (and other distributions) will have the port already configured so that the following com-
mands are not necessary. However, for the moment, here is what you need to do: