source: de.wigbels.ruby/hothotread/archiv/hothotpiper.rb@ f15e2ac

Last change on this file since f15e2ac was 8cc14b9, checked in by Norbert Wigbels <njw@…>, 9 years ago

Aufraeumen

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Line 
1#!/usr/bin/env ruby
2#
3# Author: Norbert Wigbels - foobla.wigbels.de/uber-foobla
4#
5# HotHotPiper continously reads the status of a
6# reed contact attached to the Raspberry Pi GPIO
7#
8# The reed measures gas usage.
9#
10# A magig URL is formed and called; the url
11# stores the sensor-data to wigbels.net
12#
13# todo: status-led
14#
15
16#------------------------------------------
17# Tainted mode 0-4
18$SAFE=0
19
20#------------------------------------------
21require 'pi_piper'
22include PiPiper
23
24$mypath = File.expand_path(File.dirname(__FILE__))
25
26
27def last_rrd_count
28 val = 0.0
29 handle = IO.popen("rrdtool lastupdate #{$mypath}/power.rrd")
30 handle.each_line do |line|
31 m = line.match("^[0-9]*: ([0-9.]*) [0-9.]*")
32 if m
33 val = m[1].to_f
34 break
35 end
36 end
37 return val
38end
39
40
41watch :pin => 4, :trigger => :falling do
42 puts('added 10 liter of gas to sensor-database')
43 system("rrdtool update #{$mypath}/gas.rrd N:10")
44end
45
46watch :pin => 11, :trigger => :falling do
47 puts('updated power consumption')
48 $counter = $counter + $trigger_step
49 trigger_update = $trigger_step * 3600000.0
50 system("rrdtool update #{$mypath}/power.rrd N:#{$counter}:#{trigger_update}")
51end
52
53$trigger_step = 1.0 / 96
54$counter = last_rrd_count
55
56PiPiper.wait
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