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annotate service/piNode/devices.py @ 243:141079644c45

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piNode poll switches much faster. mirror the logic in arduinoNode though vari-rate poll is not supported yet Ignore-this: 4ef38c7a2ed35f77035209bffeffc245
author drewp@bigasterisk.com
date Tue, 02 Feb 2016 22:37:11 -0800
parents 4ebb5cc30002
children f4e762943c11
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, 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 poll(self):
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123 motion = self.pi.read(17)
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124
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125 return [
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126 (self.uri, ROOM['sees'],
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127 ROOM['motion'] if motion else ROOM['noMotion']),
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128 self.recentMotionStatement(motion),
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129 ]
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130
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131 def recentMotionStatement(self, motion):
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132 if not hasattr(self, 'lastMotionTime'):
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133 self.lastMotionTime = 0
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134 now = time.time()
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135 if motion:
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136 self.lastMotionTime = now
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137 recentMotion = now - self.lastMotionTime < 60 * 10
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138 return (self.uri, ROOM['seesRecently'],
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139 ROOM['motion'] if recentMotion else ROOM['noMotion'])
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140
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141 def watchPrefixes(self):
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142 return [
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143 (self.uri, ROOM['sees']),
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144 (self.uri, ROOM['seesRecently']),
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145 ]
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148 @register
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149 class RgbStrip(DeviceType):
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150 """3 PWMs for r/g/b on a strip"""
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151 # pigpio daemon is working fine, but
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152 # https://github.com/RPi-Distro/python-gpiozero/blob/59ba7154c5918745ac894ea03503667d6473c760/gpiozero/output_devices.py#L213
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153 # can also apparently do PWM
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154 deviceType = ROOM['RgbStrip']
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155
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156 @classmethod
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157 def findInstances(cls, graph, board, pi):
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158 for row in graph.query("""SELECT DISTINCT ?dev ?r ?g ?b WHERE {
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159 ?board
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160 :hasPin ?rpin;
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161 :hasPin ?gpin;
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162 :hasPin ?bpin .
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163 ?dev a :RgbStrip;
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164 :redChannel ?rpin;
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165 :greenChannel ?gpin;
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166 :blueChannel ?bpin .
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167 ?rpin :gpioNumber ?r .
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168 ?gpin :gpioNumber ?g .
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169 ?bpin :gpioNumber ?b .
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170 } ORDER BY ?dev""",
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171 initBindings=dict(board=board),
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172 initNs={'': ROOM}):
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173 log.debug('found rgb %r', row)
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174 yield cls(graph, row.dev, pi, row.r, row.g, row.b)
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175
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176 def __init__(self, graph, uri, pi, r, g, b):
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177 self.graph, self.uri, self.pi = graph, uri, pi
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178 self.rgb = map(int, [r, g, b])
233
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179 self.value = '#000000'
183
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180
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181 def setup(self):
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182 for i in self.rgb:
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183 self.pi.set_mode(i, pigpio.OUTPUT)
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184 self.pi.set_PWM_frequency(i, 200)
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185 self.pi.set_PWM_dutycycle(i, 0)
233
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186
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187 def hostStatements(self):
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188 return [(self.uri, ROOM['color'], Literal(self.value))]
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189
183
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190 def outputPatterns(self):
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191 return [(self.uri, ROOM['color'], None)]
220
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192
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193 def _rgbFromHex(self, h):
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194 rrggbb = h.lstrip('#')
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195 return [int(x, 16) for x in [rrggbb[0:2], rrggbb[2:4], rrggbb[4:6]]]
183
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196
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197 def sendOutput(self, statements):
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198 assert len(statements) == 1
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199 assert statements[0][:2] == (self.uri, ROOM['color'])
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200
220
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201 rgb = self._rgbFromHex(statements[0][2])
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202 self.value = statements[0][2]
183
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203
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204 for (i, v) in zip(self.rgb, rgb):
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205 self.pi.set_PWM_dutycycle(i, v)
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206
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207 def outputWidgets(self):
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208 return [{
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209 'element': 'output-rgb',
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210 'subj': self.uri,
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211 'pred': ROOM['color'],
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212 }]
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213
210
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214
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215 @register
221
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216 class TempHumidSensor(DeviceType):
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217 deviceType = ROOM['TempHumidSensor']
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218
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219 def __init__(self, *a, **kw):
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220 DeviceType.__init__(self, *a, **kw)
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221 sys.path.append('/opt/pigpio/EXAMPLES/Python/DHT22_AM2302_SENSOR')
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222 import DHT22
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223 self.sensor = DHT22.sensor(self.pi, self.pinNumber)
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224
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225 def poll(self):
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226 self.sensor.trigger()
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227 humid, tempC = self.sensor.humidity(), self.sensor.temperature()
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228
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229 stmts = set()
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230 if humid is not None:
232
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231 stmts.add((self.uri, ROOM['humidity'], Literal(round(humid, 2))))
221
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232 else:
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233 stmts.add((self.uri, RDFS['comment'],
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234 Literal('DHT read returned None')))
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235 if tempC is not None:
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236 stmts.add((self.uri, ROOM['temperatureF'],
232
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237 # see round() note in arduinoNode/devices.py
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238 Literal(round(tempC * 9 / 5 + 32, 2))))
221
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239 else:
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240 stmts.add((self.uri, RDFS['comment'],
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241 Literal('DHT read returned None')))
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242 return stmts
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243
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244 def watchPrefixes(self):
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245 return [
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246 (self.uri, ROOM['temperatureF']),
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247 (self.uri, ROOM['humidity']),
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248 ]
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249
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250 @register
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251 class OneWire(DeviceType):
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252 """
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253 Also see /my/proj/ansible/roles/raspi_io_node/tasks/main.yml for
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254 some system config that contains the pin number that you want to
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255 use for onewire. The pin number in this config is currently ignored.
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256 """
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257 deviceType = ROOM['OneWire']
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258 # deliberately written like arduinoNode's one for an easier merge.
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259 def __init__(self, *a, **kw):
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260 DeviceType.__init__(self, *a, **kw)
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261 log.info("scan for w1 devices")
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262 self._sensors = w1thermsensor.W1ThermSensor.get_available_sensors()
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263 for s in self._sensors:
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264 # Something looks different about these ids
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265 # ('000003a5a94c') vs the ones I get from arduino
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266 # ('2813bea50300003d'). Not sure if I'm parsing them
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267 # differently or what.
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268 s.uri = URIRef(os.path.join(self.uri, 'dev-%s' % s.id))
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269 log.info(' found temperature sensor %s' % s.uri)
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270
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271 def poll(self):
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272 try:
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273 stmts = []
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274 for sensor in self._sensors:
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275 stmts.append((self.uri, ROOM['connectedTo'], sensor.uri))
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276 try:
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277 tempF = sensor.get_temperature(sensor.DEGREES_F)
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278 stmts.append((sensor.uri, ROOM['temperatureF'],
232
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279 # see round() note in arduinoNode/devices.py
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280 Literal(round(tempF, 2))))
221
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281 except w1thermsensor.core.SensorNotReadyError as e:
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282 log.warning(e)
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283
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284 return stmts
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285 except Exception as e:
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286 log.error(e)
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287 os.abort()
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288
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289 def watchPrefixes(self):
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290 return [(s.uri, ROOM['temperatureF']) for s in self._sensors]
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291
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292
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293 @register
210
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294 class LedOutput(DeviceType):
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295 deviceType = ROOM['LedOutput']
233
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296
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297 def hostStateInit(self):
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298 self.value = 0
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299
210
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300 def setup(self):
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301 self.pi.set_mode(self.pinNumber, pigpio.OUTPUT)
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302 self.pi.set_PWM_frequency(self.pinNumber, 200)
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303 self.pi.set_PWM_dutycycle(self.pinNumber, 0)
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304
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305 def outputPatterns(self):
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306 return [(self.uri, ROOM['brightness'], None)]
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307
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308 def sendOutput(self, statements):
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309 assert len(statements) == 1
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310 assert statements[0][:2] == (self.uri, ROOM['brightness'])
233
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311 self.value = float(statements[0][2])
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312 v = int(self.value * 255)
210
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313 self.pi.set_PWM_dutycycle(self.pinNumber, v)
233
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314
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315 def hostStatements(self):
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316 return [(self.uri, ROOM['brightness'], Literal(self.value))]
210
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317
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318 def outputWidgets(self):
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319 return [{
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320 'element': 'output-slider',
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321 'min': 0,
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322 'max': 1,
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323 'step': 1 / 255,
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324 'subj': self.uri,
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325 'pred': ROOM['brightness'],
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326 }]
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327
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328
205
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329 @register
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330 class OnboardTemperature(DeviceType):
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331 deviceType = ROOM['OnboardTemperature']
243
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332 pollPeriod = 10
205
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333 @classmethod
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334 def findInstances(cls, graph, board, pi):
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335 for row in graph.query('''SELECT DISTINCT ?uri WHERE {
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336 ?board :onboardDevice ?uri .
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337 ?uri a :OnboardTemperature .
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338 }''', initBindings=dict(board=board)):
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339 yield cls(graph, row.uri, pi, pinNumber=None)
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340
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341 def poll(self):
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342 milliC = open('/sys/class/thermal/thermal_zone0/temp').read().strip()
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343 c = float(milliC) / 1000.
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344 f = c * 1.8 + 32
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345 return [
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346 (self.uri, ROOM['temperatureF'], Literal(f, datatype=XSD['decimal'])),
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347 ]
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348
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349 def watchPrefixes(self):
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350 # these uris will become dynamic! see note on watchPrefixes
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351 # about eliminating it.
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352 return [(self.uri, ROOM['temperatureF']),
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353 ]
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354
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355 def makeDevices(graph, board, pi):
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356 out = []
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357 for dt in sorted(_knownTypes, key=lambda cls: cls.__name__):
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358 out.extend(dt.findInstances(graph, board, pi))
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359 return out
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360