#!/usr/bin/gawk -f # Denon x311 volume-plugin for munin # Copyright (C) 2010 Kristian Lyngstol # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License along # with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # This plugin asks a Denon (?) receiver over "telnet" what volume it's # running at and parses the result. It's tested with Denon AVR 4311, but I # suppose it works with the 3311 too, possibly more. It uses 192.168.0.60 # by default - because I'm lazy. ### Magic markers # #%# family=manual # #%# capabilities= # # Even if we _could_ do autoconf on ENVIRON["ip"], it's hazardous as you # have little control over timeouts and risk hanging around annoying the # user. BEGIN { if (ARGV[1] == "config") { print "graph_title Denon AVR-4311 Volume" print "graph_category radio" print "volume.label Volume" print "volume.type GAUGE" exit 0 } if (ENVIRON["ip"] == "") { ip="denon.kristian.int" } else { ip=ENVIRON["ip"] } Service="/inet/tcp/0/" ip "/23" # The AVR-4311 uses just a \r as line/record separator (annoying as # heck). RS="\r" # MV? asks for volume. Returned in MVXXZ - the z is optional print "MV?\r" |&Service Service |& getline close(Service) gsub("^MV","") # 445 == 44.5. 44 = 44. So only divide by ten if more than 2 # characters were returned. Note that it also returns 005 for 0.5 if (length >2) { n=$0/10 } else { n=$0 } # 99 is "0" and 99.5 is "0.5" (somewhat audible). I shift # everything by 1 because I prefer my lists to start at 0, not # -1.... if (n==99 || n == 99.5) { n-=99 } else { n+=1 } printf "volume.value %0.1f\n",n }