Step 7: Connecting the Pushbuttons
On the Revision 2 Pi, the six pushbuttons will connect to GPIO pins 2 (SDA), 3 (SCL), 4, 17, 27, and 22 (in order of vertical appearance on the Pi T-Cobbler). These pins are different for the Revision 1 boards; the pin changes can be found at the low-level peripherals link from the previous step.
EDIT: Since pins 2 and 3 on the Revision 2 board have pull-up resistors on them, the circuit I have shown is unnecessary (and may not function properly). You can simply connect the pushbutton between the GPIO pin and GND.
The box has six buttons. In the picture, they they are attached from left to right in the pin order given above. The functions are:
1) Change Song
2) Change Station
3) Volume Down
4) Volume Up
6) Menu/Shut Down
Button six has a dual function. If pressed momentarily, it brings up a Menu. If held for more than two seconds, it shuts down the Operating System. Once the Menu is open, new button functions are available. They are:
1) Like the current song
2) Dislike the current song (also skips to the next song)
3) Display the Pi's IP
4) Nothing (yet...)
5) Nothing (yet...)
6) Exit the Menu
Displaying the IP was added to make SSH access easier.