c/goertzel/sleepmon.sh

   1 #!/bin/bash
   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/sleeplog-"$(date +%F_%T)".txt
  16 graphout="${out%%.*}.png"
  17
  18 killall speaker-test &>/dev/null
  19 speaker-test -t sine &>/dev/null &
  20
  21 touch "$out"
  22 bash ./sleepstats.sh "$out" &>/dev/null &
  23
  24 tresh=10
  25 lastdate="$(date +%s)"
  26 screen=false
  27 graph=false
  28
  29 export LC_ALL=C
  30
  31 #trap 'kill -9 $(jobs -p);' SIGINT
  32
  33 while getopts "sg" OPT; do
  34         test "$OPT" == 's' && screen=true;
  35         test "$OPT" == 'g' && graph=true;
  36 done
  37
  38 echo "Writing log to: $out";
  39 $graph && echo "Writing graph to: $graphout"
  40 echo
  41 arecord | ./goertzel -n i -q -l c -t $tresh -d 4 | while read line; do
  42         date="$(date +%s)"
  43         time="$(echo "$line" | cut -f 1)"
  44         level="$(echo "$line" | cut -f 2)"
  45         test "$level" -gt "$tresh" && state=false || state=true
  46         $state && statenum=1 || statenum=0;
  47         $state && statename='MOTION!' || statename='Nothing';
  48
  49         printf  "%.2f\t %s %s %d" "$time" "$date" "$(date '+%F %T')" "$statenum"
  50
  51         #Debug
  52         after=$(( $date - $lastdate))
  53         printf " (%s %3d After %4d secs)\n" "$statename" "$level" "$after";
  54
  55         #Fun with values
  56         $state && {
  57                 $screen && xset dpms force off || true;
  58         } || {
  59                 $screen && xset dpms force on;
  60         }
  61         $graph && ./sleepplot.sh "$out" "$graphout" &>/dev/null &
  62
  63         #Prepare invariants for next round
  64         lastdate="$date";
  65 done | tee "$out"
  66 kill $(jobs -p); sleep 0.2
  67 echo
  68 echo "Your log: $out"
  69 $graph && {
  70         ./sleepplot.sh "$out" "$graphout" &>/dev/null
  71         echo "Your graph: $graphout"
  72 }