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 out=/tmp/sleeplog-"$(date +%F_%r)".txt
  16 speaker-test -t sine &>/dev/null &
  17 tresh=10
  18 lastdate=0
  19 arecord | ./goertzel -i -q -a -t $tresh -s 2000 | while read line; do
  20         date="$(date +%s)"
  21         time="$(echo "$line" | cut -f 1)"
  22         level="$(echo "$line" | cut -f 2)"
  23         echo -ne "$time\t$date\t$(date '+%F%t%r')\t"
  24         test "$level" -gt "$tresh" && {
  25                 echo -n "Nothing detected...";
  26         } || {
  27                 echo -n "Motion detected!!!!";
  28         }
  29         test "$lastdate" != 0 && {
  30                 after=$(( $date - $lastdate))
  31                 echo -ne "\t$level After $after secs";
  32         }
  33         echo;
  34         lastdate="$date";
  35 done | tee "$out"
  36 kill $!
  37 echo "Your file: $out"