[HH] Perl libraries for the Raspberry Pi

[Tom Metro]

http://blogs.perl.org/users/steve_bertrand/2017/03/raspberry-pi-becoming-more-prevalent.html

  ...RPi::WiringPi, which is an object oriented wrapper for
  WiringPi::API, but performs important benefits; it registers pins so
  you can't re-use them by 'accident', and it does an auto-cleanup (ie.
  it resets everything back to non-dangerous state) on failure. It also
  allows you to pull in other RPi-type objects and use them directly.