send email when peoplecounter is offline

Author: pidor

.gitignore

@@ -3,3 +3,4 @@ spaceapikey.txt
 pychromecast
 beamerip.txt
 peoplecounterip.txt
+mailconfig.py

README.txt

@@ -25,6 +25,10 @@ tzselect
 comment out the last 4 lines of rsyslogd.conf (for xconsole)
 like explained here https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=122601
 
+echo "pidor" > /etc/hostname
+sed -i 's/^127.0.1.1.*/127.0.1.1 pidor/' /etc/hosts
+
+
 cp -p systemfiles/sudoers.d/* /etc/sudoers.d/
 
 mkdir /root/var    # kinda important

scripts/mkmail.py

@@ -0,0 +1,11 @@
+#!/usr/bin/python
+import smtplib
+import sys
+import mailconfig as cnf
+server = smtplib.SMTP(cnf.mailserver, 25)
+if (len(sys.argv) < 3):
+  print "usage: "+sys.argv[0]+" 'subject' 'body text'"
+  sys.exit()
+msg = "Subject: " + sys.argv[1] + "\n\n" + sys.argv[2]
+server.sendmail(cnf.mailsource, cnf.maildestination, msg)
+server.quit()

scripts/peoplecounter-realtime.sh

@@ -10,7 +10,7 @@ else
 fi
 STATSFILE="/run/peoplecounter$DEV"
 SAMPLES=20 # how many records to keep in file
-INTERVAL=0 # how long to wait between polls
+INTERVAL=1 # how long to wait between polls
 INTERVALSKIP=20 # poll with INTERVAL but only consider every INTERVALSKIP's for SAMPLES
 MAXFILE="/var/cache/peoplecountermax$DEV"
 PRESENCYRT="/run/presencyrt$DEV"
@@ -59,7 +59,7 @@ while true
 do
   # scrape new value
   p="$(
-    wget -qO - "http://$PEOPLECOUNTERIP/output.cgi?t=$(date +%s)" |
+    wget --tries=3 --timeout=2 -qO - "http://$PEOPLECOUNTERIP/output.cgi?t=$(date +%s)" |
     sed 's/.*Occupancy://'|
     awk '{print $2}')"
   # echo "p=$p" # debug
@@ -113,12 +113,17 @@ do
     then
       state="online"
       logger $(basename $0) people counter online
+      $(dirname "$0")"/mkmail.py 'peoplecounter level2 online' 'peoplecounter is now reachable'
+      #python -c 'import smtplib ; server = smtplib.SMTP("mail.syn2cat.lu", 25) ; msg = "Subject: peoplecounter level2 onfline\n\npeoplecounter is now reachable" ; server.sendmail("[email protected]", "[email protected]", msg) ; server.quit()'
     fi
   else
     if [ "$state" = "online" ]
     then
       state="offline"
       logger $(basename $0) people counter offline
+      $(dirname "$0")"/mkmail.py 'peoplecounter level2 offline' 'peoplecounter was not reachable'
+      #python -c 'import smtplib ; server = smtplib.SMTP("mail.syn2cat.lu", 25) ; msg = "Subject: peoplecounter level2 offline\n\npeoplecounter was not reachable" ; server.sendmail("[email protected]", "[email protected]", msg) ; server.quit()'
+
     fi
   fi
   sleep "$INTERVAL"

scripts/upd_status.sh.d/peoplecountercheck

@@ -3,16 +3,24 @@
 if [ "$1" = "closed" ] && [ "$2" = "open" ]
 then
   p="$(tail -1 /run/peoplecounter)"
-  if [ "$p" != "0" ]
+  pp="$(tac /run/peoplecounter | awk -v p="$p" 'p!=$1 {print;exit}')"   # get previous count. this may fail if people exit and after long time close door
+  if [ "$pp" = "" ]
   then
-    logger $(basename $0) There are $p people, closed door from inside. Waiting 1 min. 
+    pp=0   # if no variation found, don not do anything
+  fi
+  if [ "$p" != "0" ] &&  # there are people present
+     [ "$p" -ge "$pp" ]  # nobody left i.e. current count is greater or equal to previous count
+  then
+    logger $(basename $0) There are $p people, previusly $pp, closed door from inside. Waiting 1 min. 
     sleep 60
-    p="$(tail -1 /run/peoplecounter)"
-    if [ "$p" = "0" ]
+    np="$(tail -1 /run/peoplecounter)"
+    if [ "$np" -lt "$p" ]   # new count is lower than previous
     then
-      logger $(basename $0) There are $p people, after 1 min wait. All OK.
+      logger $(basename $0) There are now $np people, after 1 min wait. All OK.
     else
-      logger $(basename $0) There are $p people, after 1 min. Maybe ALARM
+      logger $(basename $0) There are $np people, after 1 min. Maybe ALARM
+      python -c 'import smtplib ; server = smtplib.SMTP("mail.syn2cat.lu", 25) ; msg = "Subject: ALARM level2 intruder\n\ndoor closed with people inside" ; server.sendmail("[email protected]", "[email protected]", msg) ; server.quit()'
+
     fi
   else
     logger $(basename $0) There are $p people, correctly closed door from outside. All OK.