From 890439aeff4c6a30e09e66009dc26897f3dc6e66 Mon Sep 17 00:00:00 2001
From: Tomas Mudrunka <tomas@mudrunka.cz>
Date: Wed, 1 Aug 2012 02:08:16 +0200
Subject: [PATCH] Sleep Monitor using PIR sensor and Goertzel

---
 c/goertzel/sleepmon.README | 28 ++++++++++++++++++++++++++++
 c/goertzel/sleepmon.sh     | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 c/goertzel/sleepmon.README
 create mode 100755 c/goertzel/sleepmon.sh

diff --git a/c/goertzel/sleepmon.README b/c/goertzel/sleepmon.README
new file mode 100644
index 0000000..f5d38d8
--- /dev/null
+++ b/c/goertzel/sleepmon.README
@@ -0,0 +1,28 @@
+
+                            __________
+                           |
+   ___  _______  __________|
+  /   \/       \/          |   3.5mm Stereo Jack
+ |    ||       ||          |
+ |    ||       ||          |   (Mono version has right and
+  \___/\_______/\__________|   ground merged in single pole)
+                           |
+    ^       ^        ^     |___________
+    * LEFT  |        |
+            * RIGHT  |
+                     * GROUND
+                                         ___________
+                                        |           |
+                                        | PIR       |
+                   LEFT =---------+     |           |
+Soundcard INPUT  GROUND =--+      |     |           |
+                           |      |     |           |
+                           |      +-----|-o/  NC    |
+                           |      +-----|-/  Switch |
+Soundcard OUTPUT GROUND =--+      |     |           |
+                   LEFT =---------+     |           |
+                                        | 12V Power |
+                                        |  +  -     |
+                                        |__|__|_____|
+                                           |  |
+                                         To supply
diff --git a/c/goertzel/sleepmon.sh b/c/goertzel/sleepmon.sh
new file mode 100755
index 0000000..3e3ee6b
--- /dev/null
+++ b/c/goertzel/sleepmon.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Simple sleep monitor (Harvie 2012)
+#
+# You probably have soundcard with one output and input
+# Take PIR motion sensor from security system
+# Use PIR to switch connection between left channels of output and input (tips of 3.5mm jacks)
+# Connect grounds of these two together (maybe you will not need it - depending on your soundcard)
+# Power up PIR
+# Launch this script
+# Use alsamixer and some GUI recorder (like audacity) to tune volume to some usable level
+# Place PIR facing to your bed and go sleep
+# Wake up
+# Enjoy your data
+
+out=/tmp/sleeplog-"$(date +%F_%r)".txt
+speaker-test -t sine &>/dev/null &
+tresh=10
+lastdate=0
+arecord | ./goertzel -i -q -a -t $tresh -s 2000 | while read line; do
+	date="$(date +%s)"
+	time="$(echo "$line" | cut -f 1)"
+	level="$(echo "$line" | cut -f 2)"
+	echo -ne "$time\t$date\t$(date '+%F%t%r')\t"
+	test "$level" -gt "$tresh" && {
+		echo -n "Nothing detected...";
+	} || {
+		echo -n "Motion detected!!!!";
+	}
+	test "$lastdate" != 0 && {
+		after=$(( $date - $lastdate))
+		echo -ne "\t$level After $after secs";
+	}
+	echo;
+	lastdate="$date";
+done | tee "$out"
+kill $!
+echo "Your file: $out"
-- 
2.30.2