On the Subject of The Moon

I’ve waited long enough now for them all to come around; and though the sun may plead and threaten, the moon will stand her ground! So say goodnight to this, the final setting of the sun; tomorrow dawns in darkness. The night-time has begun!

• The module consists of eight “outer” crescents, eight “inner” half-moons, and a center button. Buttons on the same compass point are considered to be a set.
• Four adjacent sets start out lit, four unlit. We will refer to them as “lit 1–4” and “unlit 1–4” in clockwise order.
• Find the correct button for each set by calculating a value x as directed by the left table below, then look up its modulo-7 value in the right table.

  lit 1	D batteries		x % 7	Button
  lit 2	AA batteries		0	outer
  lit 3	Digits in serial		1	outer
  lit 4	Port plates		2	outer
  unlit 1	Modules		3	inner
  unlit 2	Consonants in serial		4	inner
  unlit 3	Indicators		5	center
  unlit 4	Ports		6	center

• Determine the first set to solve by taking the sum of the serial number digits modulo 4 and using the following table.

  0	1	2	3
  unlit 4	unlit 1	unlit 2	unlit 3

• The next 6 sets are determined by the characters in the serial number. For each character, move to the next set as directed below:

  0 1 3 5 7 8 A C E G H J L M O Q S T V X Y	2 steps clockwise
  2 4 6 9 B D F I K N P R U W Z	2 steps counterclockwise

  If this moves you onto a solved set, continue moving a single step in the given direction until you reach an unsolved set.
• The final set is the last set that remains.
• The module will be solved once you have correctly pressed eight buttons or when you have pressed the center button.