diff options
Diffstat (limited to 'examples/RRD')
| -rwxr-xr-x | examples/RRD/add_measurement_to_rrd | 5 | ||||
| -rwxr-xr-x | examples/RRD/draw_graph_from_rrd | 5 | ||||
| -rwxr-xr-x | examples/RRD/make_rrd | 3 | ||||
| -rw-r--r-- | examples/RRD/rrd.txt | 34 |
4 files changed, 47 insertions, 0 deletions
diff --git a/examples/RRD/add_measurement_to_rrd b/examples/RRD/add_measurement_to_rrd new file mode 100755 index 0000000..c261043 --- /dev/null +++ b/examples/RRD/add_measurement_to_rrd @@ -0,0 +1,5 @@ +#!/bin/sh + +MEASURED_TEMPERATURE=`clewarecontrol -rt 2> /dev/null | grep 'Temperature' | awk '{ print $2; }'` + +rrdtool update cleware_data.rrd N:$MEASURED_TEMPERATURE diff --git a/examples/RRD/draw_graph_from_rrd b/examples/RRD/draw_graph_from_rrd new file mode 100755 index 0000000..64cba57 --- /dev/null +++ b/examples/RRD/draw_graph_from_rrd @@ -0,0 +1,5 @@ +#!/bin/sh + +rrdtool graph graph.png -a PNG \ + DEF:temp=cleware_data.rrd:temperature:AVERAGE \ + LINE1:temp#FF0000:"temperatures" diff --git a/examples/RRD/make_rrd b/examples/RRD/make_rrd new file mode 100755 index 0000000..ef244c3 --- /dev/null +++ b/examples/RRD/make_rrd @@ -0,0 +1,3 @@ +#!/bin/sh + +rrdtool create cleware_data.rrd DS:temperature:GAUGE:300:U:U RRA:AVERAGE:0:1:105192 diff --git a/examples/RRD/rrd.txt b/examples/RRD/rrd.txt new file mode 100644 index 0000000..5e30e31 --- /dev/null +++ b/examples/RRD/rrd.txt @@ -0,0 +1,34 @@ +Creating temperature graphs +--------------------------- + +Files: + - rrd.txt + - make_rrdr + - add_measurement_to_rrd + - draw_graph_from_rrd + +1. First one executes the 'make_rrd' script (ONCE!) to initialize the + database in which measurements are stored. + +2. Then, from cron for example one executes every 5 minutes the + 'add_measurement_to_rrd' script. Make sure 'clewarecontrol' is in + the path. + +3. Every time you would like to have the graphs updated (e.g. you want + to see what was measured), invoke the draw_graph_from_rrd script. + +4. After invoking the draw-script, you'll find a 'graph.png'-file in + the current directory which can be viewed with your favorite + picture viewer. + + +These scripts can be easily adapted to measure humidity as well. This +is left to an excercise for the reader. +One hint for the humidity sensor: when the power went off of the +humidity sensor one needs to start it first before the sensor will +start measuring. Use 'clewarecontrol -ag' for that. + + + +For any question related to Cleware devices under Linux, feel free to +contact me at the following e-mail address: folkert@vanheusden.com |