RRD4J Persistense

Setup, Configuration and Use Beginners
1

I’m trying to force my persistence to work for several days already with no luck. May be community could help me to solve a problem.

Here is my items file

String 		TVStatus  	"TV Status [%s]" (gDN)  		      			{ exec="<[/etc/openhab/s-scripts/tv_status.sh:60000:]" }
Number          BT_Status_Alex  "Alexey is at home [%.1f]"        <bluetooth>  { exec="<[/etc/openhab/s-scripts/bt_presence_alex.sh:15000:]" }
Number          BT_Status_Vika  "Victoria is at home [%.1f]"	<bluetooth>  { exec="<[/etc/openhab/s-scripts/bt_presence_vika.sh:15000:]" }
String          Status_Motion  	"Last Motion [%s]"        			   <camera> 	{ exec="<[/etc/openhab/s-scripts/last_alarm.sh:60000:]" }
Number 		Radio_Station	"Radio"						   <audio>

Site file:

Frame label="Home Presence" {
                Group item=Presence icon="house" {
                        Text item=BT_Status_Alex icon="boy1"
                        Text item=BT_Status_Vika icon="child1"
			Chart item=BT_Status_Alex period=h refresh=15000
		}
        }

rrd4j.persist file:

Strategies {
    everyHour : "0 0 * * * ?"
    everyDay  : "0 0 0 * * ?"
    everyMinute : "0 * * * * ?"
    default = everyChange
}

Items {
    * : strategy = everyChange, everyMinute, restoreOnStartup
}

Openhab.cfg

# The name of the default persistence service to use
persistence:default=rrd4j
.....
########################### RRD4J Persistence Service #################################
#
# please note that currently the first archive in each RRD defines the consolidation
# function (e.g. AVERAGE) used by OpenHAB, thus only one consolidation function is
# fully supported
#
# default_numeric and default_other are internally defined defnames and are used as
# defaults when no other defname applies

rrd4j:<defname>.def=[ABSOLUTE|COUNTER|DERIVE|GAUGE],<heartbeat>,[<min>|U],[<max>|U],<step>
rrd4j:<defname>.archives=[AVERAGE|MIN|MAX|LAST|FIRST|TOTAL],<xff>,<steps>,<rows>
rrd4j:<defname>.items=<list of items for this defname>

one of the shell scripts I want to log:

#!/bin/bash
DATE=`date +%H:%M`
if sudo l2ping -c 1 40:40:A7:A1:E5:CB &> /dev/null
   then
	echo 1
	echo $DATE >> /etc/openhab/s-scripts/tempfiles/alex_home_bt.log
		if [[ -f /etc/openhab/s-scripts/tempfiles/alex_home_in.ankor ]]
		then
			echo "ping" &> /dev/null
		else
			touch /etc/openhab/s-scripts/tempfiles/alex_home_in.ankor
		fi
	rm /etc/openhab/s-scripts/tempfiles/alex_home_out.ankor &> /dev/null
#	stat /etc/openhab/s-scripts/tempfiles/alex_home_in.ankor 2>&1 | grep "Change" | awk '{print substr($0,20,8)}'
   else
      	echo 0
	echo $DATE >> /etc/openhab/s-scripts/tempfiles/alex_away_bt.log
        	if [[ -f /etc/openhab/s-scripts/tempfiles/alex_home_out.ankor ]]
                then
			echo "ping" &> /dev/null
                else
                        touch /etc/openhab/s-scripts/tempfiles/alex_home_out.ankor
                fi
#	stat /etc/openhab/s-scripts/tempfiles/alex_home_out.ankor 2>&1 | grep "Change" | awk '{print substr($0,20,8)}'
	rm /etc/openhab/s-scripts/tempfiles/alex_home_in.ankor &> /dev/null
fi

I see changes of the items but they are not saving in DB.

Sorry if the questions is stupid…

2

You are using rrd4j to store ALL items, however rrd4j does store numeric values!
If you are trying to use the stored value in order to populate the items after a system restart I’d suggest to use MapDB which is made for that.
What you are trying to log with the posted script, I don’t understand.

3

Thanks for the prompt answer. I’m trying to log my home presence by phone.
echo 1 - if I’m at home
echo 2 - if I’m away

I suppose as it’s numeric value and item is Number - it should be stored, I also tried mysql persistence with a same result - db creating but values are not stored. I should have missed something, but can’t figure out what exactly.

4

Try commenting out the rrd4j config parameters in openHAB.cfg and see if that matters a difference. The Number Item’s should be persisting.

How are you verifying that the Item states are not being saved by rrd4j?

5

I missed that spot he uncommented the description lines for the rrd4j archives without changing them into a usefull manner.
Good catch.

6

Everything was solved by reinstalling openhab from scratch, possibly it was a permission issue.