Add Human Activity Sensor

README.md

@@ -3,6 +3,7 @@
 Linux box with a loudspeaker and an emergency light to be used for announcements and notifications.
 
 ## Hardware
+### Overview
  * SBC with GPIOs and sound output :: OrangePi Zero with an expansion board
  * PA system
    * speaker :: 30W, 4 Ohms horn loudspeaker
@@ -11,12 +12,30 @@ Linux box with a loudspeaker and an emergency light to be used for announcements
  * Warning Light system
    * warning light :: 12V 10W rotary orange warning light
    * relay module :: 12V low trigger relay
- 
+ * System Activity Light system
+   * indicator LED
+ * Human Activity Sensor system
+   * PIR module
+
+### Building
+TBD
+
 ## Software
+### Overview
  * Operating System - Linux :: Armbian Bullseye for the OrangePi Zero
  * PA System
    * Voice Synthesizer :: Festival / ESpeak
 
+### Installation
+Run as root:
+```bash
+cp toolkit/* /usr/local/bin/
+
+cp etc/systemd/system /etc/systemd/system
+systemctl enable --now system-activity-light.service 
+systemctl enable --now human-activity-sensor.service
+```
+
 ## Implementation Notes
 
 ### Armbian + OrangePi Zero Installation
@@ -44,21 +63,6 @@ cd wiringOP
 ./build
 ```
 
-#### Initialize GPIOs
-```bash
-# System Activity Indicator
-PIN_SALIGHT=11
-gpio mode $PIN_SALIGHT output
-
-# Emergency Light system
-PIN_ELIGHT=7
-gpio mode $PIN_ELIGHT output
-
-# PA system
-PIN_PASOUND=5
-gpio mode $PIN_PASOUND output
-```
-
 ### PA System
 #### Enabling mixed sound output
 ```bash
@@ -90,78 +94,10 @@ espeak -f ssml.txt -m
 sox infile.wav outfile.wav downsample echo 0.5 1 1 1
 ```
 
-#### Playing a sound file
+### Human Activity Sensor
+
+#### Reading File Timestamp
 ```bash
-aplay file.wav
+stat /var/tmp/human_last_seen --format=%Y
-mplayer file.mp3
-```
-
-### Emergency Light
-#### Control Script
-```bash
-cat /usr/local/bin/emergency-light 
-#!/bin/bash
-
-PIN_ELIGHT=7
-
-# init
-gpio mode $PIN_ELIGHT output
-
-# command
-if [[ "$1" == "on" ]]; then
-	gpio write $PIN_ELIGHT 1
-elif [[ "$1" == "off" ]]; then
-	gpio write $PIN_ELIGHT 0
-elif [[ "$1" == "read" ]]; then
-	gpio read $PIN_ELIGHT
-else
-	gpio toggle $PIN_ELIGHT
-fi
-```
-
-### System Activity Light
-#### System Usage
-```bash
-uptime | head -n 1 | cut -f3 -d, | cut -f2 -d:
-```
-
-#### Daemon
-```bash
-cat /etc/systemd/system/system-activity-light.service
-[Unit]
-Description=System Activity Light Daemon
-
-[Service]
-ExecStart=/usr/sbin/system-activity-light-daemon
-
-[Install]
-WantedBy=multi-user.target
-```
-
-```bash
-cat /usr/sbin/system-activity-light-daemon 
-#!/bin/bash
-
-DELAY=10000
-
-while [[ true ]]; do
-	ACTIVITY=2000
-	TOP=`system-usage`
-	if (( $(echo "$TOP > 1.0" | bc -l) )); then
-		ACTIVITY=50
-	elif (( $(echo "$TOP > 0.75" | bc -l) )); then
-		ACTIVITY=100
-	elif (( $(echo "$TOP > 0.5" | bc -l) )); then
-		ACTIVITY=500
-	elif (( $(echo "$TOP > 0.2" | bc -l) )); then
-		ACTIVITY=1000
-	fi
-	echo $TOP
-	system-activity-light blink $ACTIVITY $DELAY
-done
-```
-
-```bash
-sudo systemctl enable --now system-activity-light.service
 ```
 

bin/emergency-freeform

@@ -4,20 +4,18 @@ source pa-lib
 
 pa-preheat
 
-pa-volume-loud
+pa-volume-loud-if-inactive
-pa-announcement-quickest
 
 emergency-light on
+pa-alarm-start
 
-sleep 1
+sleep 5
 
 pa-say "$@"
 
-sleep 1
+sleep 5
 
 emergency-light off
 
-pa-announcement-quick
-
 pa-shutdown
 

bin/pa-lib

@@ -29,6 +29,17 @@ function pa-volume-loud() {
 	pa-volume 25
 }
 
+function pa-volume-loud-if-inactive() {
+	LAST_ACTIVE=`human-activity-ago`
+	if [[ $LAST_ACTIVE > 200 ]]; then
+		info "Human is inactive. Last activity: $LAST_ACTIVE seconds ago."
+		pa-volume-loud
+	else
+		info "Human is active. Setting only normal volume."
+		pa-volume-normal
+	fi
+}
+
 function pa-volume-quiet() {
 	info "Volume set to low"
 	pa-volume 8
@@ -47,6 +58,7 @@ function pa-shutdown() {
 	info "PA Shutdown"
 	pa-power off
 	pa-volume-normal
+	killall $PLAYER
 }
 
 function pa-announcement() {

etc/systemd/system/human-activity-sensor.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=Human Activity Sensor Daemon
+
+[Service]
+ExecStart=/usr/local/bin/human-activity-daemon
+
+[Install]
+WantedBy=multi-user.target
+

etc/systemd/system/system-activity-light.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=System Activity Light Daemon
+
+[Service]
+ExecStart=/usr/sbin/system-activity-light-daemon
+
+[Install]
+WantedBy=multi-user.target
+

toolkit/human-activity-ago

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+LAST_SEEN_FILE=/var/tmp/human_last_seen
+LAST_CHECKED_FILE=/var/tmp/human_last_checked
+
+LAST_SEEN=`stat /var/tmp/human_last_seen --format=%Y`
+TIME_NOW=`date +%s`
+
+AGO=$(( $TIME_NOW - $LAST_SEEN ))
+echo $AGO
+

toolkit/human-activity-daemon

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+READER=human-activity-sensor
+LAST_SEEN_FILE=/var/tmp/human_last_seen
+LAST_CHECKED_FILE=/var/tmp/human_last_checked
+
+echo "Human Activity Daemon"
+echo ""
+echo "Last seen file: $LAST_SEEN_FILE"
+echo "Last checked file: $LAST_CHECKED_FILE"
+echo ""
+echo "Values stream:"
+
+LAST_VAL=-1
+while [[ true ]]; do
+	VAL=`$READER`
+	touch $LAST_CHECKED_FILE
+	if [[ $VAL == "1" ]]; then
+		touch $LAST_SEEN_FILE
+	fi
+	if [[ $LAST_VAL != $VAL ]]; then
+		echo "[`date "+%F %T"`] $VAL"
+		LAST_VAL=$VAL
+	fi
+	sleep 1
+done
+

toolkit/human-activity-sensor

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+PIN_PIR=3
+
+# init
+gpio mode $PIN_PIR input
+
+# read
+gpio read $PIN_PIR
+