c/goertzel/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
  16 out=/tmp/sleeplog-"$(date +%F_%T)".txt
  17 speaker-test -t sine &>/dev/null &
  18 tresh=10
  19 lastdate=0
  20 screen=false
  21 while getopts "s" OPT; do
  22         test "$OPT" == 's' && screen=true;
  23 done
  24 echo "Writing to file: $out";
  25 arecord | ./goertzel -n i -q -l c -t $tresh -d 4 | while read line; do
  26         date="$(date +%s)"
  27         time="$(echo "$line" | cut -f 1)"
  28         level="$(echo "$line" | cut -f 2)"
  29         echo -ne "$time\t$date\t$(date '+%F%t%T')\t"
  30         test "$level" -gt "$tresh" && {
  31                 echo -n "0 Nothing detected...";
  32                 $screen && xset dpms force off || true;
  33         } || {
  34                 echo -n "1 Motion detected!!!!";
  35                 $screen && xset dpms force on;
  36         }
  37         test "$lastdate" != 0 && {
  38                 after=$(( $date - $lastdate))
  39                 echo -ne "\t$level After $after secs";
  40         }
  41         echo;
  42         ./sleepplot.sh "$out" &>/dev/null;
  43         lastdate="$date";
  44 done | tee "$out"
  45 kill $!
  46 echo
  47 echo "Your file: $out"