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comparison py/sensor_ds18b20.py @ 144:482d7852b511

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a bit more, and some tests
author Matt Johnston <matt@ucc.asn.au>
date Mon, 26 Nov 2012 23:21:03 +0800
parents 4755e6f9a5b8
children b32e5a11a4cb
comparison
equal deleted inserted replaced
143:0895f5ad7731 144:482d7852b511
1 #!/usr/bin/env python2.7 1 #!/usr/bin/env python2.7
2 2
3 class DS18B20s(object): 3 import gevent
4 import config
5 import re
6 from utils import L,W,E,EX
4 7
5 def __init__(self): 8 class DS18B20s(gevent.Greenlet):
6 # query the bus
7 pass
8 9
9 def get_sensors(self): 10 THERM_RE = re.compile('.* YES\n.*t=(.*)\n', re.MULTILINE)
11
12 def __init__(self, server):
13 gevent.Greenlet.__init__(self)
14 self.server = server
15 # XXX set up paths
16 # XXX set up drain etc
17
18 def _run(self):
19 while True:
20 self.do()
21 gevent.sleep(config.SENSOR_SLEEP)
22
23 def sensor_path(self, s):
24 return os.path.join(self.master_dir, s)
25
26 def do_sensor_name(self, s, contents = None):
27 try:
28 if contents is None:
29 fn = os.path.join(self.sensor_path(s), 'w1_slave')
30 f = open(fn, 'r')
31 contents = f.read()
32 match = self.THERM_RE.match(contents)
33 if match is None:
34 return None
35 temp = int(match.groups(1)[0])
36 return temp / 1000.0
37 except Exception, e:
38 EX("Problem reading sensor '%s': %s" % (s, str(e)))
39 return None
40
41 def do(self):
42 vals = {}
43 for n in self.sensor_names():
44 value = do_sensor(n)
45 if value is not None:
46 vals[n] = value
47
48 self.server.add_reading(vals)
49
50 def sensor_names(self):
10 """ Returns a sequence of sensorname """ 51 """ Returns a sequence of sensorname """
11 pass 52 return [d for d in os.listdir(self.master_dir) if
12 53 os.stat(sensor_path(d)).st_mode & stat.S_ISDIR]
13 def read(self):
14 """ Returns a map of sensorname->temperature """
15 pass
16 54
17 def wort_name(self): 55 def wort_name(self):
18 pass 56 return config.WORT_NAME
19 57
20 def fridge_name(self): 58 def fridge_name(self):
21 pass 59 return config.FRIDGE_NAME