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1 #!/usr/bin/env python2.7 |
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2 |
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3 import gevent |
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4 import config |
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5 import re |
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6 from utils import L,W,E,EX |
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7 |
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8 class DS18B20s(gevent.Greenlet): |
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9 |
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10 THERM_RE = re.compile('.* YES\n.*t=(.*)\n', re.MULTILINE) |
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11 |
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12 def __init__(self, server): |
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13 gevent.Greenlet.__init__(self) |
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14 self.server = server |
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15 # XXX set up paths |
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16 # XXX set up drain etc |
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17 |
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18 def _run(self): |
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19 while True: |
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20 self.do() |
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21 gevent.sleep(config.SENSOR_SLEEP) |
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22 |
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23 def sensor_path(self, s): |
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24 return os.path.join(self.master_dir, s) |
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25 |
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26 def do_sensor_name(self, s, contents = None): |
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27 try: |
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28 if contents is None: |
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29 fn = os.path.join(self.sensor_path(s), 'w1_slave') |
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30 f = open(fn, 'r') |
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31 contents = f.read() |
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32 match = self.THERM_RE.match(contents) |
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33 if match is None: |
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34 return None |
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35 temp = int(match.groups(1)[0]) |
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36 return temp / 1000.0 |
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37 except Exception, e: |
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38 EX("Problem reading sensor '%s': %s" % (s, str(e))) |
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39 return None |
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40 |
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41 def do(self): |
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42 vals = {} |
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43 for n in self.sensor_names(): |
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44 value = do_sensor(n) |
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45 if value is not None: |
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46 vals[n] = value |
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47 |
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48 self.server.add_reading(vals) |
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49 |
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50 def sensor_names(self): |
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51 """ Returns a sequence of sensorname """ |
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52 return [d for d in os.listdir(self.master_dir) if |
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53 os.stat(sensor_path(d)).st_mode & stat.S_ISDIR] |
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54 |
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55 def wort_name(self): |
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56 return config.WORT_NAME |
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57 |
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58 def fridge_name(self): |
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59 return config.FRIDGE_NAME |
