Then we request six bytes from the

Then we
request
six bytes from the Nunchuk,
calling Wire.requestFrom( ).
Thisdoes not actually return the bytes, but we have to read them in a loop
and fill our buffer.
Wire.available( ) returns the number of bytes that are
available on the data bus, and Wire.
receive( ) returns the current byte.
We cannot use the bytes we get from the Nunchuk directly, because the
controller obfuscates them a bit.
“Decrypting” them is easy as you can
see in decode_byte( ).