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annotate service/piNode/devices.py @ 221:666e0e756ce6

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piNode support for temp sensors. proper hostname lookup Ignore-this: a68c3319bffb16c55cbb5f329118f0a4
author drewp@bigasterisk.com
date Mon, 18 Jan 2016 22:43:22 -0800
parents fb23df31b642
children 4e91f3ec460b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from __future__ import division
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2
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3 import time, logging, os
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4 from rdflib import Namespace, RDF, URIRef, Literal
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5
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6 try:
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7 import pigpio
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8 except ImportError:
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9 pigpio = None
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10 import w1thermsensor
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11
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12 import sys
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13
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14 log = logging.getLogger()
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15 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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16 XSD = Namespace('http://www.w3.org/2001/XMLSchema#')
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17 RDFS = Namespace('http://www.w3.org/2000/01/rdf-schema#')
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18
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19 class DeviceType(object):
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20 deviceType = NotImplementedError
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21 @classmethod
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22 def findInstances(cls, graph, board, pi):
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23 """
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24 return any number of instances of this class for all the separately
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25 controlled devices on the board. Two LEDS makes two instances,
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26 but two sensors on the same onewire bus makes only one device
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27 (which yields more statements).
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28 """
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29 log.debug("graph has any connected devices of type %s?", cls.deviceType)
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30 for row in graph.query("""SELECT ?dev ?gpioNumber WHERE {
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31 ?board :hasPin ?pin .
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32 ?pin :gpioNumber ?gpioNumber;
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33 :connectedTo ?dev .
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34 ?dev a ?thisType .
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35 } ORDER BY ?dev""",
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36 initBindings=dict(board=board,
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37 thisType=cls.deviceType)):
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38 yield cls(graph, row.dev, pi, int(row.gpioNumber))
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39
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40 def __init__(self, graph, uri, pi, pinNumber):
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41 self.graph, self.uri, self.pi = graph, uri, pi
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42 self.pinNumber = pinNumber
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43
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44 def description(self):
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45 return {
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46 'uri': self.uri,
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47 'className': self.__class__.__name__,
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48 'pinNumber': getattr(self, 'pinNumber', None),
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49 'outputPatterns': self.outputPatterns(),
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50 'watchPrefixes': self.watchPrefixes(),
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51 'outputWidgets': self.outputWidgets(),
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52 }
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53
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54 def watchPrefixes(self):
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55 """
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56 subj,pred pairs of the statements that might be returned from
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57 readFromPoll, so the dashboard knows what it should
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58 watch. This should be eliminated, as the dashboard should just
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59 always watch the whole tree of statements starting self.uri
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60 """
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61 return []
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62
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63 def poll(self):
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64 return [] # statements
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65
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66 def outputPatterns(self):
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67 """
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68 Triple patterns, using None as a wildcard, that should be routed
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69 to sendOutput
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70 """
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71 return []
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72
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73 def outputWidgets(self):
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74 """
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75 structs to make output widgets on the dashboard. ~1 of these per
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76 handler you have in sendOutput
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77 """
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78 return []
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79
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80 def sendOutput(self, statements):
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81 """
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82 If we got statements that match this class's outputPatterns, this
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83 will be called with the statements that matched.
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84
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85 Todo: it would be fine to read back confirmations or
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86 whatever. Just need a way to collect them into graph statements.
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87 """
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88 raise NotImplementedError
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89
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90 _knownTypes = set()
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91 def register(deviceType):
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92 _knownTypes.add(deviceType)
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93 return deviceType
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94
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95 @register
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96 class MotionSensorInput(DeviceType):
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97 # compare motion sensor lib at http://pythonhosted.org/gpiozero/inputs/
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98 # which is a bit fancier
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99 deviceType = ROOM['MotionSensor']
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100
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101 def setup(self):
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102 self.pi.set_mode(17, pigpio.INPUT)
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103 self.pi.set_pull_up_down(17, pigpio.PUD_DOWN)
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104
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105 def poll(self):
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106 motion = self.pi.read(17)
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107
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108 return [
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109 (self.uri, ROOM['sees'],
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110 ROOM['motion'] if motion else ROOM['noMotion']),
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111 self.recentMotionStatement(motion),
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112 ]
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113
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114 def recentMotionStatement(self, motion):
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115 if not hasattr(self, 'lastMotionTime'):
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116 self.lastMotionTime = 0
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117 now = time.time()
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118 if motion:
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119 self.lastMotionTime = now
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120 recentMotion = now - self.lastMotionTime < 60 * 10
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121 return (self.uri, ROOM['seesRecently'],
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122 ROOM['motion'] if recentMotion else ROOM['noMotion'])
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123
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124 def watchPrefixes(self):
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125 return [
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126 (self.uri, ROOM['sees']),
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127 (self.uri, ROOM['seesRecently']),
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128 ]
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129
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130
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131 @register
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132 class RgbStrip(DeviceType):
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133 """3 PWMs for r/g/b on a strip"""
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134 # pigpio daemon is working fine, but
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135 # https://github.com/RPi-Distro/python-gpiozero/blob/59ba7154c5918745ac894ea03503667d6473c760/gpiozero/output_devices.py#L213
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136 # can also apparently do PWM
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137 deviceType = ROOM['RgbStrip']
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138
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139 @classmethod
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140 def findInstances(cls, graph, board, pi):
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141 for row in graph.query("""SELECT DISTINCT ?dev ?r ?g ?b WHERE {
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142 ?board
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143 :hasPin ?rpin;
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144 :hasPin ?gpin;
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145 :hasPin ?bpin .
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146 ?dev a :RgbStrip;
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147 :redChannel ?rpin;
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148 :greenChannel ?gpin;
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149 :blueChannel ?bpin .
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150 ?rpin :gpioNumber ?r .
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151 ?gpin :gpioNumber ?g .
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152 ?bpin :gpioNumber ?b .
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153 } ORDER BY ?dev""",
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154 initBindings=dict(board=board),
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155 initNs={'': ROOM}):
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156 log.debug('found rgb %r', row)
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157 yield cls(graph, row.dev, pi, row.r, row.g, row.b)
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158
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159 def __init__(self, graph, uri, pi, r, g, b):
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160 self.graph, self.uri, self.pi = graph, uri, pi
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161 self.rgb = map(int, [r, g, b])
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162
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163 def setup(self):
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164 for i in self.rgb:
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165 self.pi.set_mode(i, pigpio.OUTPUT)
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166 self.pi.set_PWM_frequency(i, 200)
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167 self.pi.set_PWM_dutycycle(i, 0)
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168
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169 def outputPatterns(self):
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170 return [(self.uri, ROOM['color'], None)]
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171
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172 def _rgbFromHex(self, h):
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173 rrggbb = h.lstrip('#')
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174 return [int(x, 16) for x in [rrggbb[0:2], rrggbb[2:4], rrggbb[4:6]]]
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175
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176 def sendOutput(self, statements):
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177 assert len(statements) == 1
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178 assert statements[0][:2] == (self.uri, ROOM['color'])
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179
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180 rgb = self._rgbFromHex(statements[0][2])
183
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181
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182 for (i, v) in zip(self.rgb, rgb):
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183 self.pi.set_PWM_dutycycle(i, v)
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184
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185 def outputWidgets(self):
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186 return [{
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187 'element': 'output-rgb',
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188 'subj': self.uri,
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189 'pred': ROOM['color'],
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190 }]
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191
210
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192
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193 @register
221
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194 class TempHumidSensor(DeviceType):
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195 deviceType = ROOM['TempHumidSensor']
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196
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197 def __init__(self, *a, **kw):
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198 DeviceType.__init__(self, *a, **kw)
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199 sys.path.append('/opt/pigpio/EXAMPLES/Python/DHT22_AM2302_SENSOR')
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200 import DHT22
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201 self.sensor = DHT22.sensor(self.pi, self.pinNumber)
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202
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203 def poll(self):
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204 self.sensor.trigger()
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205 humid, tempC = self.sensor.humidity(), self.sensor.temperature()
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206
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207 stmts = set()
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208 if humid is not None:
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209 stmts.add((self.uri, ROOM['humidity'], Literal(humid)))
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210 else:
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211 stmts.add((self.uri, RDFS['comment'],
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212 Literal('DHT read returned None')))
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213 if tempC is not None:
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214 stmts.add((self.uri, ROOM['temperatureF'],
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215 Literal(tempC * 9 / 5 + 32)))
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216 else:
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217 stmts.add((self.uri, RDFS['comment'],
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218 Literal('DHT read returned None')))
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219 return stmts
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220
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221 def watchPrefixes(self):
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222 return [
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223 (self.uri, ROOM['temperatureF']),
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224 (self.uri, ROOM['humidity']),
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225 ]
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226
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227 @register
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228 class OneWire(DeviceType):
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229 """
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230 Also see /my/proj/ansible/roles/raspi_io_node/tasks/main.yml for
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231 some system config that contains the pin number that you want to
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232 use for onewire. The pin number in this config is currently ignored.
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233 """
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234 deviceType = ROOM['OneWire']
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235 # deliberately written like arduinoNode's one for an easier merge.
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236 def __init__(self, *a, **kw):
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237 DeviceType.__init__(self, *a, **kw)
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238 log.info("scan for w1 devices")
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239 self._sensors = w1thermsensor.W1ThermSensor.get_available_sensors()
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240 for s in self._sensors:
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241 # Something looks different about these ids
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242 # ('000003a5a94c') vs the ones I get from arduino
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243 # ('2813bea50300003d'). Not sure if I'm parsing them
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244 # differently or what.
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245 s.uri = URIRef(os.path.join(self.uri, 'dev-%s' % s.id))
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246 log.info(' found temperature sensor %s' % s.uri)
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247
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248 def poll(self):
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249 try:
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250 stmts = []
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251 for sensor in self._sensors:
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252 stmts.append((self.uri, ROOM['connectedTo'], sensor.uri))
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253 try:
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254 tempF = sensor.get_temperature(sensor.DEGREES_F)
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255 stmts.append((sensor.uri, ROOM['temperatureF'],
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256 Literal(tempF)))
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257 except w1thermsensor.core.SensorNotReadyError as e:
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258 log.warning(e)
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259
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260 return stmts
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261 except Exception as e:
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262 log.error(e)
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263 os.abort()
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264
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265 def watchPrefixes(self):
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266 return [(s.uri, ROOM['temperatureF']) for s in self._sensors]
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267
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268
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269 @register
210
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270 class LedOutput(DeviceType):
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271 deviceType = ROOM['LedOutput']
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272
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273 def setup(self):
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274 self.pi.set_mode(self.pinNumber, pigpio.OUTPUT)
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275 self.pi.set_PWM_frequency(self.pinNumber, 200)
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276 self.pi.set_PWM_dutycycle(self.pinNumber, 0)
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277
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278 def outputPatterns(self):
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279 return [(self.uri, ROOM['brightness'], None)]
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280
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281 def sendOutput(self, statements):
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282 assert len(statements) == 1
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283 assert statements[0][:2] == (self.uri, ROOM['brightness'])
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284 v = int(float(statements[0][2]) * 255)
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285 self.pi.set_PWM_dutycycle(self.pinNumber, v)
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286
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287 def outputWidgets(self):
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288 return [{
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289 'element': 'output-slider',
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290 'min': 0,
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291 'max': 1,
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292 'step': 1 / 255,
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293 'subj': self.uri,
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294 'pred': ROOM['brightness'],
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295 }]
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296
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297
205
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298 @register
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299 class OnboardTemperature(DeviceType):
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300 deviceType = ROOM['OnboardTemperature']
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301 @classmethod
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302 def findInstances(cls, graph, board, pi):
207
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303 for row in graph.query('''SELECT DISTINCT ?uri WHERE {
205
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304 ?board :onboardDevice ?uri .
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305 ?uri a :OnboardTemperature .
221
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306 }''', initBindings=dict(board=board)):
205
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307 yield cls(graph, row.uri, pi, pinNumber=None)
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308
208
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309 def poll(self):
205
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310 milliC = open('/sys/class/thermal/thermal_zone0/temp').read().strip()
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311 c = float(milliC) / 1000.
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312 f = c * 1.8 + 32
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313 return [
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314 (self.uri, ROOM['temperatureF'], Literal(f, datatype=XSD['decimal'])),
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315 ]
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316
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317 def watchPrefixes(self):
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318 # these uris will become dynamic! see note on watchPrefixes
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319 # about eliminating it.
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320 return [(self.uri, ROOM['temperatureF']),
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321 ]
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322
182
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323 def makeDevices(graph, board, pi):
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324 out = []
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325 for dt in sorted(_knownTypes, key=lambda cls: cls.__name__):
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326 out.extend(dt.findInstances(graph, board, pi))
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327 return out
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328