54 lines
1.2 KiB
Ruby
54 lines
1.2 KiB
Ruby
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#!/usr/bin/env ruby
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require 'pi_piper'
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require 'eventmachine'
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include PiPiper
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mypath = File.expand_path(File.dirname(__FILE__))
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trigger_step = 0.01
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trigger_watch = 0
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counter = 0.0
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timestamp = Time.now.to_i
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def last_rrd_count(concretepath)
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val = 0.0
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handle = IO.popen("rrdtool lastupdate #{concretepath}")
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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 => :rising, :pull => :up do
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puts('triggered watch to 1')
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trigger_watch = 1
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end
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rrdpath = mypath + "/gasneu.rrd"
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counter = last_rrd_count(rrdpath)
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puts('Counter restored to: ' + counter.to_s)
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#PiPiper::Pin.new(:pin => 4, :direction => :in)
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EventMachine.run do
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EM.add_periodic_timer(1) do
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if trigger_watch == 1 then
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counter = counter + trigger_step
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system("rrdtool update #{rrdpath} N:#{counter}:#{trigger_step}")
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puts('Counter updated to: ' + counter.to_s)
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timestamp = Time.now.to_i
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trigger_watch = 0
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elsif Time.now.to_i - timestamp > 3600
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system("rrdtool update #{rrdpath} N:#{counter}:0")
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timestamp = Time.now.to_i
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end
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end
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end
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