bash/sleepmonitor/sleepmon.sh

   1 #!/bin/sh
   2 # Simple sleep monitor (Harvie 2012)
   3 #
   4 # You probably have soundcard with one output and input
   5 # Take PIR motion sensor from security system
   6 # Use PIR to switch connection between left channels of output and input (tips of 3.5mm jacks)
   7 # Connect grounds of these two together (maybe you will not need it - depending on your soundcard)
   8 # Power up PIR
   9 # Launch this script
  10 # Use alsamixer and some GUI recorder (like audacity) to tune volume to some usable level
  11 # Place PIR facing to your bed and go sleep
  12 # Wake up
  13 # Enjoy your data
  14
  15 out=/tmp/sleepmon-"$(date +%F_%r)".wav
  16 speaker-test -t sine &>/dev/null &
  17 time arecord -r 4000 "$out"
  18 kill $!
  19 echo "Your file: $out"