Sorry, I don't have the inclination to delve deeply into the code you post. But in the first handful of lines I notice:

• you don't use strict;
• you don't use warnings;
• you don't check the return status of your open(), e.g.

  open(CONFIG, "<homenet.actiontrigger.conf") or
      die "Can't open config file: $!";
  [download]

I'd put those three things at the top of your "to do" list.

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