--- main.c ---
fix everything from main() onward with exception of do_sleep()

--- Menu ---
Attach - Attempt to attach spool
Detach - Attempt to detach spool
Adjust - Adjust Spool Value
Battery - Print Battery Info - Voltage, mAh

--- UI ---
123456mm A<B
123456mm A>B
          _
XXXXXXXX | |
XXXXXXXX | |
XXXXXXXX |_|

Battery Should be 2px segments per 5%