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rfb/simple rrd graphing of acurite temp sensors

Created December 7, 2021 17:45
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simple rrd graphing of acurite temp sensors
> rrdcreate temp.rrd DS:temp:GAUGE:30:-100:100 RRA:AVERAGE:0.5:1:1000
> rtl_433 -F "mqtt://localhost"
> mosquitto_sub -h localhost -t 'rtl_433/barley/events' | jq --unbuffered 'select(.id == 56 and .model == "Acurite-606TX") | .temperature_C' | xargs -I{} rrdtool update temp.rrd N:{}
> rrdtool graph temp.png DEF:temp=temp.rrd:temp:AVERAGE:step=1200 LINE1:temp#FF00FF:"Temp"
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