|
0
|
1 #!/usr/bin/env python
|
|
|
2
|
|
|
3 import pexpect, re, threading, time, logging
|
|
|
4 from logging.handlers import RotatingFileHandler
|
|
|
5
|
|
|
6 class ROMReadError(Exception):
|
|
|
7 pass
|
|
|
8
|
|
|
9 class Control():
|
|
|
10 targetTemp = 18
|
|
|
11 hysteresis = 4
|
|
|
12 pollInterval = 30
|
|
|
13
|
|
|
14 def __init__(self, m):
|
|
|
15 self.m = m
|
|
|
16 self.initLog()
|
|
|
17
|
|
|
18 def initLog(self):
|
|
|
19 # Init our logging
|
|
|
20 global log
|
|
|
21 log = logging.getLogger("monitor")
|
|
|
22
|
|
|
23 # Default to warts and all logging
|
|
|
24 log.setLevel(logging.DEBUG)
|
|
|
25
|
|
|
26 # Log to this file
|
|
|
27 logfile = logging.handlers.RotatingFileHandler(filename = "/tmp/monitor.log",
|
|
|
28 maxBytes = 10000, backupCount = 3)
|
|
|
29
|
|
|
30 # And stderr
|
|
|
31 logstderr = logging.StreamHandler()
|
|
|
32
|
|
|
33 # Format it nicely
|
|
|
34 formatter = logging.Formatter(fmt = "%(asctime)s: %(message)s", datefmt = "%Y%m%d %H:%M:%S")
|
|
|
35
|
|
|
36 # Glue it all together
|
|
|
37 logfile.setFormatter(formatter)
|
|
|
38 logstderr.setFormatter(formatter)
|
|
|
39 log.addHandler(logfile)
|
|
|
40 log.addHandler(logstderr)
|
|
|
41 return(log)
|
|
|
42
|
|
|
43 def doit(self):
|
|
|
44 log.debug("=== Inited ===")
|
|
|
45 log.debug("target temperature - %3.2f" % (self.targetTemp))
|
|
|
46 log.debug("fermenterId - %s" % (self.m.fermenterId))
|
|
|
47 log.debug("fridgeId - %s" % (self.m.fridgeId))
|
|
|
48 log.debug("ambientId - %s" % (self.m.ambientId))
|
|
|
49 log.debug("minCoolOnTime - %d, minCoolOffTime - %d" % (self.m.minCoolOnTime, self.m.minCoolOffTime))
|
|
|
50 log.debug("minHeatOnTime - %d, minHeatOffTime - %d" % (self.m.minHeatOnTime, self.m.minHeatOffTime))
|
|
|
51 log.debug("pollInterval - %d" % (self.pollInterval))
|
|
|
52
|
|
|
53 log.debug("=== Starting ===")
|
|
|
54 log.debug("Fermenter Fridge Ambient State New State")
|
|
|
55 while True:
|
|
|
56 if (self.m.lastUpdate == 0):
|
|
|
57 print "%s Invalid data" % (time.asctime())
|
|
|
58 time.sleep(30)
|
|
|
59 self.m.setState('idle')
|
|
|
60 continue
|
|
|
61
|
|
|
62 nextState = "-"
|
|
|
63
|
|
|
64 diff = self.m.temps[self.m.fermenterId] - self.targetTemp
|
|
|
65 if (self.m.currState == 'idle'):
|
|
|
66 # If we're idle then only heat or cool if the temperate difference is out of the
|
|
|
67 # hysteresis range
|
|
|
68 if (abs(diff) > self.hysteresis):
|
|
|
69 if (diff < 0 and self.m.minHeatOffTime + self.m.lastHeatOff < time.time()):
|
|
|
70 nextState = 'heat'
|
|
|
71 elif (diff > 0 and self.m.minHeatOffTime + self.m.lastHeatOff < time.time()):
|
|
|
72 nextState = 'cool'
|
|
|
73 elif (self.m.currState == 'cool'):
|
|
|
74 # Go idle as soon as we can, there will be overshoot anyway
|
|
|
75 if (diff < 0 and self.m.minCoolOnTime + self.m.lastCoolOn < time.time()):
|
|
|
76 nextState = 'idle'
|
|
|
77 elif (self.m.currState == 'heat'):
|
|
|
78 if (diff > 0 and self.m.minHeatOnTime + self.m.lastHeatOn < time.time()):
|
|
|
79 nextState = 'idle'
|
|
|
80 else:
|
|
|
81 raise KeyError
|
|
|
82
|
|
|
83 log.debug("%3.2f %3.2f %3.2f %s %s" %
|
|
|
84 (self.m.temps[self.m.fermenterId],
|
|
|
85 self.m.temps[self.m.fridgeId], self.m.temps[self.m.ambientId],
|
|
|
86 self.m.currState, nextState))
|
|
|
87 if (nextState != "-"):
|
|
|
88 self.m.setState(nextState)
|
|
|
89
|
|
|
90 time.sleep(self.pollInterval)
|
|
|
91
|
|
|
92
|
|
|
93 class MonitorDev(threading.Thread):
|
|
|
94 # Match a ROM ID (eg 00:11:22:33:44:55:66:77)
|
|
|
95 romre = re.compile('([0-9a-f]{2}:){7}[0-9a-f]{2}')
|
|
|
96 # Match the prompt
|
|
|
97 promptre = re.compile('> ')
|
|
|
98
|
|
|
99 coolRelay = 7
|
|
|
100 heatRelay = 6
|
|
|
101
|
|
|
102 fermenterId = '10:eb:48:21:01:08:00:df'
|
|
|
103 fridgeId = '10:a6:2a:c4:00:08:00:11'
|
|
|
104 ambientId = '10:97:1b:fe:00:08:00:d1'
|
|
|
105
|
|
|
106 # minimum time the cooler must spend on/off
|
|
|
107 minCoolOnTime = 10 * 60
|
|
|
108 minCoolOffTime = 10 * 60
|
|
|
109
|
|
|
110 # minimum time the heater must spend on/off
|
|
|
111 minHeatOnTime = 60
|
|
|
112 minHeatOffTime = 60
|
|
|
113
|
|
|
114 temps = {}
|
|
|
115 lastUpdate = 0
|
|
|
116
|
|
|
117 # Lock to gate access to the comms
|
|
|
118 commsLock = None
|
|
|
119
|
|
|
120 currState = 'idle'
|
|
|
121
|
|
|
122 lastHeatOn = 0
|
|
|
123 lastHeatOff = 0
|
|
|
124 lastCoolOn = 0
|
|
|
125 lastCoolOff = 0
|
|
|
126
|
|
|
127 def __init__(self):
|
|
|
128 threading.Thread.__init__(self)
|
|
|
129 self.commsLock = threading.Lock()
|
|
|
130 self.p = pexpect.spawn('/usr/bin/ssh', ['-xt', '-enone', '-i', '/home/darius/.ssh/id_wrt', 'root@wrt', '(echo logged in; microcom -D/dev/cua/1)'])
|
|
|
131 assert(self.p.expect('logged in') == 0)
|
|
|
132 self.p.timeout = 3
|
|
|
133 self.setspeed()
|
|
|
134 self.devs = self.find1wire()
|
|
|
135 self.temps = filter(self.istemp, self.devs)
|
|
|
136
|
|
|
137 self.start()
|
|
|
138
|
|
|
139 def setspeed(self):
|
|
|
140 self.commsLock.acquire()
|
|
|
141 self.p.send('~')
|
|
|
142 assert(self.p.expect('t - set terminal') == 0)
|
|
|
143 self.p.send('t')
|
|
|
144 assert(self.p.expect('p - set speed') == 0)
|
|
|
145 self.p.send('p')
|
|
|
146 assert(self.p.expect('f - 38400') == 0)
|
|
|
147 self.p.send('f')
|
|
|
148 assert(self.p.expect('done!') == 0)
|
|
|
149 self.commsLock.release()
|
|
|
150
|
|
|
151 def find1wire(self):
|
|
|
152 self.commsLock.acquire()
|
|
|
153 self.p.sendline('')
|
|
|
154 assert(self.p.expect('> ') == 0)
|
|
|
155 self.p.sendline('sr')
|
|
|
156 # Echo
|
|
|
157 assert(self.p.expect('sr') == 0)
|
|
|
158
|
|
|
159 # Send a new line which will give us a command prompt to stop on
|
|
|
160 # later. We could use read() but that would make the code a lot
|
|
|
161 # uglier
|
|
|
162 self.p.sendline('')
|
|
|
163
|
|
|
164 devlist = []
|
|
|
165
|
|
|
166 # Loop until we get the command prompt (> ) collecting ROM IDs
|
|
|
167 while True:
|
|
|
168 idx = self.p.expect([self.romre, self.promptre])
|
|
|
169 if (idx == 0):
|
|
|
170 # Matched a ROM
|
|
|
171 #print "Found ROM " + self.p.match.group()
|
|
|
172 devlist.append(self.p.match.group(0))
|
|
|
173 elif (idx == 1):
|
|
|
174 # Matched prompt, exit
|
|
|
175 break
|
|
|
176 else:
|
|
|
177 # Unpossible!
|
|
|
178 self.commsLock.release()
|
|
|
179 raise SystemError()
|
|
|
180
|
|
|
181 self.commsLock.release()
|
|
|
182
|
|
|
183 return(devlist)
|
|
|
184
|
|
|
185 def istemp(self, id):
|
|
|
186 [family, a, b, c, d, e, f, g] = id.split(':')
|
|
|
187 if (family == '10'):
|
|
|
188 return True
|
|
|
189 else:
|
|
|
190 return False
|
|
|
191
|
|
|
192 def updateTemps(self):
|
|
|
193 tmp = {}
|
|
|
194 for i in self.temps:
|
|
|
195 tmp[i] = float(self.readTemp(i))
|
|
|
196
|
|
|
197 self.temps = tmp
|
|
|
198 self.lastUpdate = time.time()
|
|
|
199 return(self.temps)
|
|
|
200
|
|
|
201 def readTemp(self, id):
|
|
|
202 self.commsLock.acquire()
|
|
|
203 cmd = 'te ' + id
|
|
|
204 self.p.sendline(cmd)
|
|
|
205 # Echo
|
|
|
206 assert(self.p.expect(cmd) == 0)
|
|
|
207 # Eat EOL left from expect
|
|
|
208 self.p.readline()
|
|
|
209
|
|
|
210 line = self.p.readline().strip()
|
|
|
211 self.commsLock.release()
|
|
|
212 # 'CRC mismatch' can mean that we picked the wrong ROM..
|
|
|
213 if (re.match('CRC mismatch', line) != None):
|
|
|
214 raise ROMReadError
|
|
|
215
|
|
|
216 return(line)
|
|
|
217
|
|
|
218 def setState(self, state):
|
|
|
219 if (state == 'cool'):
|
|
|
220 relay = 1 << self.coolRelay
|
|
|
221 elif (state == 'heat'):
|
|
|
222 relay = 1 << self.heatRelay
|
|
|
223 elif (state == 'idle'):
|
|
|
224 relay = 0
|
|
|
225 else:
|
|
|
226 raise(ValueError)
|
|
|
227
|
|
|
228 if (state == self.currState):
|
|
|
229 return
|
|
|
230
|
|
|
231 # Keep track of when we last turned off or on
|
|
|
232 if (state == 'cool'):
|
|
|
233 if (self.currState == 'heat'):
|
|
|
234 self.lastHeatOff = time.time()
|
|
|
235 self.lastCoolOn = time.time()
|
|
|
236 elif (state == 'heat'):
|
|
|
237 if (self.currState == 'cool'):
|
|
|
238 self.lastCoolOff = time.time()
|
|
|
239 self.lastHeatOn = time.time()
|
|
|
240 else:
|
|
|
241 if (self.currState == 'cool'):
|
|
|
242 self.lastCoolOff = time.time()
|
|
|
243 if (self.currState == 'heat'):
|
|
|
244 self.lastHeatOff = time.time()
|
|
|
245
|
|
|
246 self.currState = state
|
|
|
247
|
|
|
248 self.commsLock.acquire()
|
|
|
249 # Need the extra spaces cause the parser in the micro is busted
|
|
|
250 cmd = 'out c %02x' % relay
|
|
|
251 self.p.sendline(cmd)
|
|
|
252 # Echo
|
|
|
253 assert(self.p.expect(cmd) == 0)
|
|
|
254 self.commsLock.release()
|
|
|
255
|
|
|
256 def polltemps(self, temps):
|
|
|
257 while True:
|
|
|
258 for d in temps:
|
|
|
259 #print d
|
|
|
260 t = gettemp(p, d)
|
|
|
261 print "%s -> %s" % (d, t)
|
|
|
262 print
|
|
|
263
|
|
|
264 def run(self):
|
|
|
265 while True:
|
|
|
266 self.updateTemps()
|
|
|
267
|
|
|
268 def main():
|
|
|
269 import time, monitor
|
|
|
270
|
|
|
271 m = monitor.MonitorDev()
|
|
|
272
|
|
|
273 try:
|
|
|
274 c = monitor.Control(m)
|
|
|
275 # Wait for the first temperature readings to come through, saves
|
|
|
276 # getting an 'invalid data' message
|
|
|
277 time.sleep(3)
|
|
|
278 c.doit()
|
|
|
279 log.debug("doit exited")
|
|
|
280
|
|
|
281 except KeyboardInterrupt:
|
|
|
282 log.debug("Exiting due to keyboard interrupt")
|
|
|
283
|
|
|
284 finally:
|
|
|
285 # Make sure we try and turn it off if something goes wrong
|
|
|
286 m.setState('idle')
|
|
|
287
|
|
|
288 sys.exit(0)
|
|
|
289
|
|
|
290 if __name__ == "__main__":
|
|
|
291 main()
|
