57 lines
1.2 KiB
Ruby
57 lines
1.2 KiB
Ruby
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#!/usr/bin/env ruby
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#
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# Author: Norbert Wigbels - foobla.wigbels.de/uber-foobla
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#
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# HotHotPiper continously reads the status of a
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# reed contact attached to the Raspberry Pi GPIO
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#
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# The reed measures gas usage.
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#
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# A magig URL is formed and called; the url
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# stores the sensor-data to wigbels.net
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#
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# todo: status-led
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#
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#------------------------------------------
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# Tainted mode 0-4
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$SAFE=0
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#------------------------------------------
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require 'pi_piper'
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include PiPiper
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$mypath = File.expand_path(File.dirname(__FILE__))
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def last_rrd_count
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val = 0.0
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handle = IO.popen("rrdtool lastupdate #{$mypath}/power.rrd")
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handle.each_line do |line|
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m = line.match("^[0-9]*: ([0-9.]*) [0-9.]*")
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if m
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val = m[1].to_f
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break
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end
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end
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return val
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end
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watch :pin => 4, :trigger => :falling do
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puts('added 10 liter of gas to sensor-database')
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system("rrdtool update #{$mypath}/gas.rrd N:10")
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end
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watch :pin => 11, :trigger => :falling do
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puts('updated power consumption')
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$counter = $counter + $trigger_step
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trigger_update = $trigger_step * 3600000.0
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system("rrdtool update #{$mypath}/power.rrd N:#{$counter}:#{trigger_update}")
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end
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$trigger_step = 1.0 / 96
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$counter = last_rrd_count
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PiPiper.wait
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