I too have just begun to work with the RPi and Arduino. My end project is to replace the controls on the grain dryer on my farm which currently uses all relay/timer logic: aka no feedback/tracking/analysis of any kind.

The plan is to use the Arduino for control logic/data acquisition and Apache/Perl on the RPI to monitor status and display analysis. I was very pleased to find Perl ready to rock-n-roll on my Debian install on the RPi.

If all goes well, by harvest 2015, I will have a machine which I can start/stop and monitor the entire process from some simple web forms all driven by Perl and delivered via wireless access.

Good to hear someone else here playing around with Perl on the RPi! Thanks for you post and your code!