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annotate service/piNode/devices.py @ 254:ba1149814877

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pi device support for motionStart edge trigger Ignore-this: 1eda3d0bed8def055573fdc1db3cd7c3
author drewp@bigasterisk.com
date Mon, 21 Mar 2016 04:18:45 -0700
parents 254df9f881a6
children 54fad386d6f5
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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, 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 self.hostStateInit()
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44
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45 def hostStateInit(self):
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46 """
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47 If you don't want to use __init__, you can use this to set up
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48 whatever storage you might need for hostStatements
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49 """
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50
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51 def description(self):
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52 return {
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53 'uri': self.uri,
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54 'className': self.__class__.__name__,
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55 'pinNumber': getattr(self, 'pinNumber', None),
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56 'outputPatterns': self.outputPatterns(),
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57 'watchPrefixes': self.watchPrefixes(),
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58 'outputWidgets': self.outputWidgets(),
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59 }
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60
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61 def hostStatements(self):
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62 """
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63 Like readFromPoll but these statements come from the host-side
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64 python code, not the connected device. Include output state
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65 (e.g. light brightness) if its master version is in this
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66 object. This method is called on /graph requests so it should
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67 be fast.
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68 """
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69 return []
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70
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71 def watchPrefixes(self):
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72 """
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73 subj,pred pairs of the statements that might be returned from
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74 readFromPoll, so the dashboard knows what it should
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75 watch. This should be eliminated, as the dashboard should just
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76 always watch the whole tree of statements starting self.uri
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77 """
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78 return []
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79
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80 def poll(self):
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81 return [] # statements
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82
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83 def outputPatterns(self):
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84 """
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85 Triple patterns, using None as a wildcard, that should be routed
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86 to sendOutput
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87 """
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88 return []
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89
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90 def outputWidgets(self):
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91 """
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92 structs to make output widgets on the dashboard. ~1 of these per
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93 handler you have in sendOutput
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94 """
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95 return []
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96
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97 def sendOutput(self, statements):
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98 """
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99 If we got statements that match this class's outputPatterns, this
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100 will be called with the statements that matched.
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101
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102 Todo: it would be fine to read back confirmations or
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103 whatever. Just need a way to collect them into graph statements.
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104 """
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105 raise NotImplementedError
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106
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107 _knownTypes = set()
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108 def register(deviceType):
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109 _knownTypes.add(deviceType)
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110 return deviceType
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111
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112 @register
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113 class MotionSensorInput(DeviceType):
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114 # compare motion sensor lib at http://pythonhosted.org/gpiozero/inputs/
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115 # which is a bit fancier
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116 deviceType = ROOM['MotionSensor']
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117
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118 def setup(self):
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119 self.pi.set_mode(17, pigpio.INPUT)
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120 self.pi.set_pull_up_down(17, pigpio.PUD_DOWN)
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121
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122 def hostStateInit(self):
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123 self.lastRead = None
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124
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125 def poll(self):
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126 motion = self.pi.read(17)
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127
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128 oneshot = []
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129 if self.lastRead is not None and motion != self.lastRead:
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130 oneshot = [(self.uri, ROOM['sees'], ROOM['motionStart'])]
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131 self.lastRead = motion
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132
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133 return {'latest': [
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134 (self.uri, ROOM['sees'],
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135 ROOM['motion'] if motion else ROOM['noMotion']),
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136 self.recentMotionStatement(motion),
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137 ], 'oneshot': oneshot}
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138
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139 def recentMotionStatement(self, motion):
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140 if not hasattr(self, 'lastMotionTime'):
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141 self.lastMotionTime = 0
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142 now = time.time()
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143 if motion:
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144 self.lastMotionTime = now
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145 recentMotion = now - self.lastMotionTime < 60 * 10
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146 return (self.uri, ROOM['seesRecently'],
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147 ROOM['motion'] if recentMotion else ROOM['noMotion'])
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148
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149 def watchPrefixes(self):
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150 return [
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151 (self.uri, ROOM['sees']),
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152 (self.uri, ROOM['seesRecently']),
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153 ]
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154
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155
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156 @register
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157 class RgbStrip(DeviceType):
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158 """3 PWMs for r/g/b on a strip"""
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159 # pigpio daemon is working fine, but
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160 # https://github.com/RPi-Distro/python-gpiozero/blob/59ba7154c5918745ac894ea03503667d6473c760/gpiozero/output_devices.py#L213
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161 # can also apparently do PWM
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162 deviceType = ROOM['RgbStrip']
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163
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164 @classmethod
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165 def findInstances(cls, graph, board, pi):
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166 for row in graph.query("""SELECT DISTINCT ?dev ?r ?g ?b WHERE {
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167 ?board
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168 :hasPin ?rpin;
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169 :hasPin ?gpin;
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170 :hasPin ?bpin .
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171 ?dev a :RgbStrip;
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172 :redChannel ?rpin;
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173 :greenChannel ?gpin;
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174 :blueChannel ?bpin .
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175 ?rpin :gpioNumber ?r .
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176 ?gpin :gpioNumber ?g .
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177 ?bpin :gpioNumber ?b .
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178 } ORDER BY ?dev""",
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179 initBindings=dict(board=board),
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180 initNs={'': ROOM}):
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181 log.debug('found rgb %r', row)
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182 yield cls(graph, row.dev, pi, row.r, row.g, row.b)
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183
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184 def __init__(self, graph, uri, pi, r, g, b):
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185 self.graph, self.uri, self.pi = graph, uri, pi
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186 self.rgb = map(int, [r, g, b])
233
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187 self.value = '#000000'
183
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188
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189 def setup(self):
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190 for i in self.rgb:
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191 self.pi.set_mode(i, pigpio.OUTPUT)
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192 self.pi.set_PWM_frequency(i, 200)
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193 self.pi.set_PWM_dutycycle(i, 0)
233
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194
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195 def hostStatements(self):
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196 return [(self.uri, ROOM['color'], Literal(self.value))]
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197
183
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198 def outputPatterns(self):
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199 return [(self.uri, ROOM['color'], None)]
220
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200
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201 def _rgbFromHex(self, h):
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202 rrggbb = h.lstrip('#')
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203 return [int(x, 16) for x in [rrggbb[0:2], rrggbb[2:4], rrggbb[4:6]]]
183
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204
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205 def sendOutput(self, statements):
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206 assert len(statements) == 1
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207 assert statements[0][:2] == (self.uri, ROOM['color'])
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208
220
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209 rgb = self._rgbFromHex(statements[0][2])
233
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210 self.value = statements[0][2]
183
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211
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212 for (i, v) in zip(self.rgb, rgb):
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213 self.pi.set_PWM_dutycycle(i, v)
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214
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215 def outputWidgets(self):
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216 return [{
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217 'element': 'output-rgb',
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218 'subj': self.uri,
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219 'pred': ROOM['color'],
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220 }]
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221
210
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222
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223 @register
221
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224 class TempHumidSensor(DeviceType):
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225 deviceType = ROOM['TempHumidSensor']
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226
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227 def __init__(self, *a, **kw):
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228 DeviceType.__init__(self, *a, **kw)
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229 sys.path.append('/opt/pigpio/EXAMPLES/Python/DHT22_AM2302_SENSOR')
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230 import DHT22
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231 self.sensor = DHT22.sensor(self.pi, self.pinNumber)
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232
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233 def poll(self):
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234 self.sensor.trigger()
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235 humid, tempC = self.sensor.humidity(), self.sensor.temperature()
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236
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237 stmts = set()
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238 if humid is not None:
232
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239 stmts.add((self.uri, ROOM['humidity'], Literal(round(humid, 2))))
221
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240 else:
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241 stmts.add((self.uri, RDFS['comment'],
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242 Literal('DHT read returned None')))
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243 if tempC is not None:
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244 stmts.add((self.uri, ROOM['temperatureF'],
232
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245 # see round() note in arduinoNode/devices.py
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246 Literal(round(tempC * 9 / 5 + 32, 2))))
221
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247 else:
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248 stmts.add((self.uri, RDFS['comment'],
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249 Literal('DHT read returned None')))
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250 return stmts
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251
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252 def watchPrefixes(self):
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253 return [
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254 (self.uri, ROOM['temperatureF']),
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255 (self.uri, ROOM['humidity']),
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256 ]
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257
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258 @register
244
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259 class PushbuttonInput(DeviceType):
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260 """add a switch to ground; we'll turn on pullup"""
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261 deviceType = ROOM['Pushbutton']
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262
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263 def __init__(self, *a, **kw):
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264 DeviceType.__init__(self, *a, **kw)
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265 log.debug("setup switch on %r", self.pinNumber)
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266 self.pi.set_mode(self.pinNumber, pigpio.INPUT)
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267 self.pi.set_pull_up_down(self.pinNumber, pigpio.PUD_UP)
251
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268 self.lastClosed = None
244
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269
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270 def poll(self):
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271 closed = not self.pi.read(self.pinNumber)
251
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272
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273 if self.lastClosed is not None and closed != self.lastClosed:
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274 oneshot = [
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275 (self.uri, ROOM['buttonState'],
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276 ROOM['press'] if closed else ROOM['release']),
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277 ]
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278 else:
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279 oneshot = []
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280 self.lastClosed = closed
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281
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282 return {'latest': [
244
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283 (self.uri, ROOM['buttonState'],
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284 ROOM['pressed'] if closed else ROOM['notPressed']),
251
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285 ],
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286 'oneshot':oneshot}
244
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287
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288 def watchPrefixes(self):
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289 return [
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290 (self.uri, ROOM['buttonState']),
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291 ]
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292
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293 @register
221
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294 class OneWire(DeviceType):
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295 """
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296 Also see /my/proj/ansible/roles/raspi_io_node/tasks/main.yml for
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297 some system config that contains the pin number that you want to
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298 use for onewire. The pin number in this config is currently ignored.
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299 """
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300 deviceType = ROOM['OneWire']
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301 # deliberately written like arduinoNode's one for an easier merge.
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302 def __init__(self, *a, **kw):
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303 DeviceType.__init__(self, *a, **kw)
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304 log.info("scan for w1 devices")
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305 self._sensors = w1thermsensor.W1ThermSensor.get_available_sensors()
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306 for s in self._sensors:
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307 # Something looks different about these ids
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308 # ('000003a5a94c') vs the ones I get from arduino
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309 # ('2813bea50300003d'). Not sure if I'm parsing them
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310 # differently or what.
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311 s.uri = URIRef(os.path.join(self.uri, 'dev-%s' % s.id))
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312 log.info(' found temperature sensor %s' % s.uri)
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313
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314 def poll(self):
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315 try:
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316 stmts = []
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317 for sensor in self._sensors:
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318 stmts.append((self.uri, ROOM['connectedTo'], sensor.uri))
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319 try:
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320 tempF = sensor.get_temperature(sensor.DEGREES_F)
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321 stmts.append((sensor.uri, ROOM['temperatureF'],
232
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322 # see round() note in arduinoNode/devices.py
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323 Literal(round(tempF, 2))))
221
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324 except w1thermsensor.core.SensorNotReadyError as e:
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325 log.warning(e)
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326
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327 return stmts
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328 except Exception as e:
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329 log.error(e)
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330 os.abort()
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331
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332 def watchPrefixes(self):
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333 return [(s.uri, ROOM['temperatureF']) for s in self._sensors]
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334
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335
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336 @register
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337 class LedOutput(DeviceType):
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338 deviceType = ROOM['LedOutput']
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339
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340 def hostStateInit(self):
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341 self.value = 0
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342
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343 def setup(self):
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344 self.pi.set_mode(self.pinNumber, pigpio.OUTPUT)
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345 self.pi.set_PWM_frequency(self.pinNumber, 200)
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346 self.pi.set_PWM_dutycycle(self.pinNumber, 0)
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347
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348 def outputPatterns(self):
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349 return [(self.uri, ROOM['brightness'], None)]
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350
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351 def sendOutput(self, statements):
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352 assert len(statements) == 1
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353 assert statements[0][:2] == (self.uri, ROOM['brightness'])
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354 self.value = float(statements[0][2])
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355 v = int(self.value * 255)
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356 self.pi.set_PWM_dutycycle(self.pinNumber, v)
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357
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358 def hostStatements(self):
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359 return [(self.uri, ROOM['brightness'], Literal(self.value))]
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360
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361 def outputWidgets(self):
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362 return [{
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363 'element': 'output-slider',
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364 'min': 0,
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365 'max': 1,
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366 'step': 1 / 255,
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367 'subj': self.uri,
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368 'pred': ROOM['brightness'],
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369 }]
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370
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371
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372 @register
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373 class OnboardTemperature(DeviceType):
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374 deviceType = ROOM['OnboardTemperature']
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375 pollPeriod = 10
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376 @classmethod
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377 def findInstances(cls, graph, board, pi):
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378 for row in graph.query('''SELECT DISTINCT ?uri WHERE {
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379 ?board :onboardDevice ?uri .
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380 ?uri a :OnboardTemperature .
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381 }''', initBindings=dict(board=board)):
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382 yield cls(graph, row.uri, pi, pinNumber=None)
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383
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384 def poll(self):
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385 milliC = open('/sys/class/thermal/thermal_zone0/temp').read().strip()
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386 c = float(milliC) / 1000.
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387 f = c * 1.8 + 32
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388 return [
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389 (self.uri, ROOM['temperatureF'], Literal(f, datatype=XSD['decimal'])),
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390 ]
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391
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392 def watchPrefixes(self):
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393 # these uris will become dynamic! see note on watchPrefixes
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394 # about eliminating it.
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395 return [(self.uri, ROOM['temperatureF']),
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396 ]
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397
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398 def makeDevices(graph, board, pi):
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399 out = []
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400 for dt in sorted(_knownTypes, key=lambda cls: cls.__name__):
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401 out.extend(dt.findInstances(graph, board, pi))
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402 return out
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403