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Add RRD output mode. Trim comments
author Daniel O'Connor <darius@dons.net.au>
date Wed, 20 Nov 2013 23:44:55 +1030
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children 139e267c9965
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An RRD can be created like so..

rrdtool create ~/meter.rrd		\
	DS:import:COUNTER:600:U:U	\
	DS:export:COUNTER:600:U:U	\
	RRA:AVERAGE:0.5:1:105120	\
	RRA:AVERAGE:0.5:12:105120	\
	RRA:MAX:0.5:1:105120		\
	RRA:MAX:0.5:12:105120		\
	RRA:MIN:0.5:1:105120		\
	RRA:MIN:0.5:12:105120

Then data added with..
rrdtool update ~/meter.rrd `ssh -ay -i ~/.ssh/id_rpi pi@raspberrypi python iec1107/iec1107.py -r /dev/ttyUSB0`