Hi All,
Long time user (since 2003). Have been a bit dormant lately on the RRDtool
front.
I'm looking for some help regarding a hopefully simple issue. I am on rrdtool
1.4.7 on 32-bit Gentoo linux.
I have a iComfort Lennox thermostat and a website which allows me to gather
some thermostat statistics (probably against their terms of service - mea
culpa). You can see an example here:
http://haroon.sis.utoronto.ca/perl/rrd.cgi/home_stats/temp.html
You can look at the source of one of the graphics here:
http://haroon.sis.utoronto.ca/perl/rrd.cgi/home_stats/temp-day.src
I would like to know how to display how many minutes (or seconds or percentage
of time), the furnace or A/C is on. The mode DS returns 0 for idle, 1 for
heating and 2 (yet to be tested) for cooling. For heating, I use the following
CDEF:
# heating is on: if (FLOOR(mode + 0.5) - 1) then unknown else temp
CDEF:heating=mode,.5,+,FLOOR,1,-,UNKN,temp,IF
Which means that heating is the value of the temp when it is on. It is UNKN
otherwise.
Is there a VDEF that I can use to figure out minutes (or percentage) that the
heating is on?
RRD was created as follows:
/usr/bin/rrdtool create /www/htdocs/rrd/logs/home_stats/hvac.rrd \
--step 300 \
DS:temp:GAUGE:600:-100:200 \
DS:cool_to:GAUGE:600:-100:200 \
DS:heat_to:GAUGE:600:-100:200 \
DS:humidity:GAUGE:600:0:100 \
DS:mode:GAUGE:600:0:10 \
RRA:AVERAGE:0.5:1:800 \
RRA:AVERAGE:0.5:6:800 \
RRA:AVERAGE:0.5:24:800 \
RRA:AVERAGE:0.5:288:800 \
RRA:MAX:0.5:1:800 \
RRA:MAX:0.5:6:800 \
RRA:MAX:0.5:24:800 \
RRA:MAX:0.5:288:800
Let me know if I missed any details and you need more info.
Thanks in advance for any help.
Cheers,
--
Haroon Rafique <haroon.rafi...@utoronto.ca>
Web Dude 416-946-5080
Information Security & Enterprise Architecture, University of Toronto
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