https://rrdwizard.appspot.com/index.php rrdtool create filename.rrd \ --step '300' \ 'DS:PM25:GAUGE:300:0:2000' \ 'DS:PM10:GAUGE:300:0:2000' \ 'DS:Temperature:GAUGE:300:-30:60' \ 'DS:Humidity:GAUGE:300:0:100' \ 'DS:hPa:GAUGE:300:300:1100' \ 'RRA:MIN:0.5:1:105408' \ 'RRA:MAX:0.5:1:105408' \ 'RRA:AVERAGE:0.5:1:105408' \ 'RRA:LAST:0.5:1:105408' \ 'RRA:MIN:0.5:12:87600' \ 'RRA:MAX:0.5:12:87600' \ 'RRA:AVERAGE:0.5:12:87600' \ 'RRA:LAST:0.5:12:87600' VALUE:PM10,PM25,Temperature,Humidity UNIT:µg,µg,°C,% SPAN:1h 1d 1w ... export VALUE=Humidity export UNIT=% export SPAN=1d rrdtool graph "graph_$VALUE.png" \ --title "$VALUE" \ --vertical-label "$UNIT" \ --width '600' \ --height '200' \ --start end-$SPAN \ "DEF:VNAME=db_761_762.rrd:$VALUE:MAX" \ 'VDEF:vmin=VNAME,MINIMUM' \ 'VDEF:vmax=VNAME,MAXIMUM' \ 'VDEF:vavg=VNAME,AVERAGE' \ 'VDEF:vlast=VNAME,LAST' \ 'LINE1:VNAME#0000FF' \ 'GPRINT:vmin:%3.1lf (min)' \ 'GPRINT:vmax:%3.1lf (max)' \ 'GPRINT:vavg:%3.1lf (avg)' \ 'GPRINT:vlast:%3.1lf (last)'