Mercurial > templog

annotate py/sensor_ds18b20.py @ 452:25bdf95f0e29

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
config for sensor IDs
author Matt Johnston <matt@ucc.asn.au>
date Thu, 20 Dec 2012 22:26:18 +0800
parents e99559bf188f
children d03157c7ad60
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 #!/usr/bin/env python2.7
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
3 import os
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
4 import re
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
5
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
6 import gevent
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
7 import gevent.threadpool
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
8
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
9 import config
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
10 from utils import D,L,W,E,EX
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
11
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
12 class DS18B20s(gevent.Greenlet):
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
13
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
14 THERM_RE = re.compile('.* YES\n.*t=(.*)\n', re.MULTILINE)
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
16 def __init__(self, server):
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
17 gevent.Greenlet.__init__(self)
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
18 self.server = server
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
19 self.readthread = gevent.threadpool.ThreadPool(1)
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
20 self.master_dir = config.SENSOR_BASE_DIR
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
21
449
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
22 def do(self):
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
23 vals = {}
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
24 for n in self.sensor_names():
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
25 value = self.do_sensor(n)
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
26 if value is not None:
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
27 vals[n] = value
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
28
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
29 itemp = self.do_internal()
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
30 if itemp:
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
31 vals['internal'] = itemp
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
32
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
33 self.server.add_reading(vals)
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
34
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
35 def _run(self):
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
36 while True:
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
37 self.do()
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
38 gevent.sleep(config.SENSOR_SLEEP)
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
39
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
40 def read_wait(self, f):
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
41 # handles a blocking file read with a gevent threadpool. A
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
42 # real python thread performs the read while other gevent
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
43 # greenlets keep running.
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
44 # the ds18b20 takes ~750ms to read, which is noticable
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
45 # interactively.
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
46 return self.readthread.apply(f.read)
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
48 def do_sensor(self, s, contents = None):
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
49 """ contents can be set by the caller for testing """
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
50 D("dosensor %s" % s)
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
51 try:
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
52 if contents is None:
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
53 fn = os.path.join(self.master_dir, s, 'w1_slave')
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
54 f = open(fn, 'r')
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
55 contents = self.read_wait(f)
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
56
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
57 match = self.THERM_RE.match(contents)
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
58 if match is None:
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
59 D("no match")
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
60 return None
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
61 temp = int(match.groups(1)[0]) / 1000.0
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
62 D("returning %f" % temp)
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
63 return temp
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
64 except Exception, e:
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
65 EX("Problem reading sensor '%s': %s" % (s, str(e)))
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
66 return None
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67
449
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
68 def do_internal(self):
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
69 try:
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
70 return int(open(config.INTERNAL_TEMPERATURE, 'r').read()) / 1000.0
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
71 except Exception, e:
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
72 EX("Problem reading internal sensor: %s" % str(e))
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
73 return None
e99559bf188f internal temperature sensor
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
74
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
75
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
76 def sensor_names(self):
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
77 """ Returns a sequence of sensorname """
447
8fdf86ea41e7 few updates, seems to run
Matt Johnston <matt@ucc.asn.au>
parents: 443
diff changeset
78 slaves_path = os.path.join(self.master_dir, "w1_master_slaves")
448
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
79 names = open(slaves_path, 'r').read().split()
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
80 D("returning names %s" % names)
fe729664a5e6 working better. logging works properly, cleanup fridge.off() happens.
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
81 return names
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 def wort_name(self):
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
84 return config.WORT_NAME
439
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85
31ac84425a2d python raspberry pi rewrite
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 def fridge_name(self):
443
bca470d153fd a bit more, and some tests
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
87 return config.FRIDGE_NAME