Might mention that 5V is not needed for read-only

[arpruss]

You might want to make it clear in the documentation that if you don't want to use the rumble, you don't need to connect the 5V pin on the controller.

[brownan]

good point! The controller circuits only need the 3.3 volts as I recall

[arpruss]

Right: I just checked this, at least on my off-brand controllers.