Mercurial > ~darius > hgwebdir.cgi > beermon
annotate beermon.py @ 4:32a56dd33e42
- Reduce hystersis down to 0.5C
- Properly track stale data (hopefully anyway :)
- Check if the monitor thread has died (ie unexpected exception)
- Re-work some variable names to be clearer (& add comments)
| author | darius |
|---|---|
| date | Fri, 28 Sep 2007 13:05:11 +0000 |
| parents | 1af7c85d5a0e |
| children | 8d471840b153 |
| rev | line source |
|---|---|
| 0 | 1 #!/usr/bin/env python |
| 2 | |
| 1 | 3 ############################################################################ |
| 4 # Monitor & control fermenter temperature | |
| 5 # v1.0 | |
| 6 # | |
| 4 | 7 # $Id: beermon.py,v 1.5 2007/09/28 13:05:11 darius Exp $ |
| 1 | 8 # |
| 9 # Depends on: Python 2.3 (I think) | |
| 10 # | |
| 11 ############################################################################ | |
| 12 # | |
| 13 # Copyright (C) 2007 Daniel O'Connor. All rights reserved. | |
| 14 # | |
| 15 # Redistribution and use in source and binary forms, with or without | |
| 16 # modification, are permitted provided that the following conditions | |
| 17 # are met: | |
| 18 # 1. Redistributions of source code must retain the above copyright | |
| 19 # notice, this list of conditions and the following disclaimer. | |
| 20 # 2. Redistributions in binary form must reproduce the above copyright | |
| 21 # notice, this list of conditions and the following disclaimer in the | |
| 22 # documentation and/or other materials provided with the distribution. | |
| 23 # | |
| 24 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| 25 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 28 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 # SUCH DAMAGE. | |
| 35 # | |
| 36 ############################################################################ | |
| 37 | |
| 38 | |
|
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Wait on a condition var instead of using time.sleep() - this works
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39 import pexpect, re, threading, time, logging, sys, traceback |
| 0 | 40 from logging.handlers import RotatingFileHandler |
| 41 | |
| 42 class ROMReadError(Exception): | |
| 43 pass | |
| 44 | |
| 4 | 45 class ThreadDied(Exception): |
| 46 pass | |
| 47 | |
| 0 | 48 class Control(): |
| 49 targetTemp = 18 | |
| 4 | 50 hysteresis = 0.5 |
| 0 | 51 pollInterval = 30 |
| 4 | 52 staleDataTime = 30 |
| 0 | 53 |
| 1 | 54 def __init__(self, m, _log): |
| 0 | 55 self.m = m |
| 56 global log | |
| 1 | 57 log = _log |
|
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Wait on a condition var instead of using time.sleep() - this works
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58 self.cv = threading.Condition() |
|
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
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59 self.cv.acquire() |
| 1 | 60 |
| 0 | 61 def doit(self): |
| 62 log.debug("target temperature - %3.2f" % (self.targetTemp)) | |
| 63 log.debug("fermenterId - %s" % (self.m.fermenterId)) | |
| 64 log.debug("fridgeId - %s" % (self.m.fridgeId)) | |
| 65 log.debug("ambientId - %s" % (self.m.ambientId)) | |
| 66 log.debug("minCoolOnTime - %d, minCoolOffTime - %d" % (self.m.minCoolOnTime, self.m.minCoolOffTime)) | |
| 67 log.debug("minHeatOnTime - %d, minHeatOffTime - %d" % (self.m.minHeatOnTime, self.m.minHeatOffTime)) | |
| 68 log.debug("pollInterval - %d" % (self.pollInterval)) | |
| 69 | |
| 70 log.debug("=== Starting ===") | |
| 71 log.debug("Fermenter Fridge Ambient State New State") | |
| 72 while True: | |
| 4 | 73 # Check if our monitor thread has died |
| 74 if (not self.m.isAlive()): | |
| 75 raise ThreadDied, "Monitor thread has died" | |
| 76 | |
| 77 # Check for stale data | |
| 78 if (self.m.lastUpdate[self.m.fermenterId] + self.staleDataTime < time.time()): | |
| 79 log.debug("Stale data") | |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
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changeset
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80 self.cv.wait(self.pollInterval) |
| 0 | 81 self.m.setState('idle') |
| 82 continue | |
| 83 | |
| 4 | 84 # Work out what state we should go into |
| 0 | 85 nextState = "-" |
| 86 diff = self.m.temps[self.m.fermenterId] - self.targetTemp | |
| 87 if (self.m.currState == 'idle'): | |
| 88 # If we're idle then only heat or cool if the temperate difference is out of the | |
| 4 | 89 # hysteresis band |
| 0 | 90 if (abs(diff) > self.hysteresis): |
| 91 if (diff < 0 and self.m.minHeatOffTime + self.m.lastHeatOff < time.time()): | |
| 92 nextState = 'heat' | |
| 93 elif (diff > 0 and self.m.minHeatOffTime + self.m.lastHeatOff < time.time()): | |
| 94 nextState = 'cool' | |
| 95 elif (self.m.currState == 'cool'): | |
| 96 # Go idle as soon as we can, there will be overshoot anyway | |
| 97 if (diff < 0 and self.m.minCoolOnTime + self.m.lastCoolOn < time.time()): | |
| 98 nextState = 'idle' | |
| 99 elif (self.m.currState == 'heat'): | |
| 4 | 100 # Ditto |
| 0 | 101 if (diff > 0 and self.m.minHeatOnTime + self.m.lastHeatOn < time.time()): |
| 102 nextState = 'idle' | |
| 103 else: | |
| 4 | 104 # Not possible.. |
| 0 | 105 raise KeyError |
| 106 | |
| 107 log.debug("%3.2f %3.2f %3.2f %s %s" % | |
| 108 (self.m.temps[self.m.fermenterId], | |
| 109 self.m.temps[self.m.fridgeId], self.m.temps[self.m.ambientId], | |
| 110 self.m.currState, nextState)) | |
| 4 | 111 |
| 0 | 112 if (nextState != "-"): |
| 113 self.m.setState(nextState) | |
| 4 | 114 |
|
2
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
|
115 self.cv.wait(self.pollInterval) |
| 0 | 116 |
| 117 | |
| 118 class MonitorDev(threading.Thread): | |
| 119 # Match a ROM ID (eg 00:11:22:33:44:55:66:77) | |
| 120 romre = re.compile('([0-9a-f]{2}:){7}[0-9a-f]{2}') | |
| 121 # Match the prompt | |
| 122 promptre = re.compile('> ') | |
| 123 | |
| 124 coolRelay = 7 | |
| 125 heatRelay = 6 | |
| 126 | |
| 127 fermenterId = '10:eb:48:21:01:08:00:df' | |
| 128 fridgeId = '10:a6:2a:c4:00:08:00:11' | |
| 129 ambientId = '10:97:1b:fe:00:08:00:d1' | |
| 130 | |
| 131 # minimum time the cooler must spend on/off | |
| 132 minCoolOnTime = 10 * 60 | |
| 133 minCoolOffTime = 10 * 60 | |
| 134 | |
| 135 # minimum time the heater must spend on/off | |
| 136 minHeatOnTime = 60 | |
| 137 minHeatOffTime = 60 | |
| 138 | |
| 4 | 139 # Dictionary of sensor IDs & temperatures |
| 0 | 140 temps = {} |
| 4 | 141 # Dictionary of sensor IDs & epoch times |
| 142 lastUpdate = {} | |
| 0 | 143 |
| 4 | 144 # List of all device IDs |
| 145 devs = [] | |
| 146 # List of temperature sensor IDs | |
| 147 tempdevs = [] | |
| 148 | |
| 0 | 149 # Lock to gate access to the comms |
| 150 commsLock = None | |
| 151 | |
| 152 currState = 'idle' | |
| 153 | |
| 154 lastHeatOn = 0 | |
| 155 lastHeatOff = 0 | |
| 156 lastCoolOn = 0 | |
| 157 lastCoolOff = 0 | |
| 158 | |
| 159 def __init__(self): | |
| 160 threading.Thread.__init__(self) | |
| 161 self.commsLock = threading.Lock() | |
| 162 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)']) | |
| 163 assert(self.p.expect('logged in') == 0) | |
| 164 self.p.timeout = 3 | |
| 165 self.setspeed() | |
| 166 self.devs = self.find1wire() | |
| 4 | 167 self.tempdevs = filter(self.istemp, self.devs) |
| 0 | 168 |
| 169 self.start() | |
| 170 | |
| 171 def setspeed(self): | |
| 172 self.commsLock.acquire() | |
| 173 self.p.send('~') | |
| 174 assert(self.p.expect('t - set terminal') == 0) | |
| 175 self.p.send('t') | |
| 176 assert(self.p.expect('p - set speed') == 0) | |
| 177 self.p.send('p') | |
| 178 assert(self.p.expect('f - 38400') == 0) | |
| 179 self.p.send('f') | |
| 180 assert(self.p.expect('done!') == 0) | |
| 181 self.commsLock.release() | |
| 182 | |
| 183 def find1wire(self): | |
| 184 self.commsLock.acquire() | |
| 185 self.p.sendline('') | |
| 186 assert(self.p.expect('> ') == 0) | |
| 187 self.p.sendline('sr') | |
| 188 # Echo | |
| 189 assert(self.p.expect('sr') == 0) | |
| 190 | |
| 191 # Send a new line which will give us a command prompt to stop on | |
| 192 # later. We could use read() but that would make the code a lot | |
| 193 # uglier | |
| 194 self.p.sendline('') | |
| 195 | |
| 196 devlist = [] | |
| 197 | |
| 198 # Loop until we get the command prompt (> ) collecting ROM IDs | |
| 199 while True: | |
| 200 idx = self.p.expect([self.romre, self.promptre]) | |
| 201 if (idx == 0): | |
| 202 # Matched a ROM | |
| 203 #print "Found ROM " + self.p.match.group() | |
| 204 devlist.append(self.p.match.group(0)) | |
| 205 elif (idx == 1): | |
| 206 # Matched prompt, exit | |
| 207 break | |
| 208 else: | |
| 209 # Unpossible! | |
| 210 self.commsLock.release() | |
| 211 raise SystemError() | |
| 212 | |
| 213 self.commsLock.release() | |
| 214 | |
| 215 return(devlist) | |
| 216 | |
| 217 def istemp(self, id): | |
| 218 [family, a, b, c, d, e, f, g] = id.split(':') | |
| 219 if (family == '10'): | |
| 220 return True | |
| 221 else: | |
| 222 return False | |
| 223 | |
| 224 def updateTemps(self): | |
| 4 | 225 for i in self.tempdevs: |
| 226 try: | |
| 227 self.temps[i] = float(self.readTemp(i)) | |
| 228 self.lastUpdate[i] = time.time() | |
| 229 except ROMReadError: | |
| 230 # Ignore this - just results in no update reflected by lastUpdate | |
| 231 pass | |
| 232 | |
| 0 | 233 return(self.temps) |
| 234 | |
| 235 def readTemp(self, id): | |
| 236 self.commsLock.acquire() | |
| 237 cmd = 'te ' + id | |
| 238 self.p.sendline(cmd) | |
| 239 # Echo | |
| 240 assert(self.p.expect(cmd) == 0) | |
| 241 # Eat EOL left from expect | |
| 242 self.p.readline() | |
| 243 | |
| 244 line = self.p.readline().strip() | |
| 245 self.commsLock.release() | |
| 246 # 'CRC mismatch' can mean that we picked the wrong ROM.. | |
| 247 if (re.match('CRC mismatch', line) != None): | |
| 248 raise ROMReadError | |
| 249 | |
| 250 return(line) | |
| 251 | |
| 252 def setState(self, state): | |
| 253 if (state == 'cool'): | |
| 254 relay = 1 << self.coolRelay | |
| 255 elif (state == 'heat'): | |
| 256 relay = 1 << self.heatRelay | |
| 257 elif (state == 'idle'): | |
| 258 relay = 0 | |
| 259 else: | |
| 260 raise(ValueError) | |
| 261 | |
| 262 if (state == self.currState): | |
| 263 return | |
| 264 | |
| 265 # Keep track of when we last turned off or on | |
| 266 if (state == 'cool'): | |
| 267 if (self.currState == 'heat'): | |
| 268 self.lastHeatOff = time.time() | |
| 269 self.lastCoolOn = time.time() | |
| 270 elif (state == 'heat'): | |
| 271 if (self.currState == 'cool'): | |
| 272 self.lastCoolOff = time.time() | |
| 273 self.lastHeatOn = time.time() | |
| 274 else: | |
| 275 if (self.currState == 'cool'): | |
| 276 self.lastCoolOff = time.time() | |
| 277 if (self.currState == 'heat'): | |
| 278 self.lastHeatOff = time.time() | |
| 279 | |
| 280 self.currState = state | |
| 281 | |
| 282 self.commsLock.acquire() | |
| 283 # Need the extra spaces cause the parser in the micro is busted | |
| 284 cmd = 'out c %02x' % relay | |
| 285 self.p.sendline(cmd) | |
| 286 # Echo | |
| 287 assert(self.p.expect(cmd) == 0) | |
| 288 self.commsLock.release() | |
| 289 | |
| 290 def polltemps(self, temps): | |
| 291 while True: | |
| 292 for d in temps: | |
| 293 #print d | |
| 294 t = gettemp(p, d) | |
| 295 print "%s -> %s" % (d, t) | |
| 296 print | |
| 297 | |
| 298 def run(self): | |
| 299 while True: | |
| 300 self.updateTemps() | |
| 301 | |
| 1 | 302 def initLog(): |
| 303 # Init our logging | |
| 304 log = logging.getLogger("monitor") | |
| 305 | |
| 306 # Default to warts and all logging | |
| 307 log.setLevel(logging.DEBUG) | |
| 308 | |
| 309 # Log to this file | |
| 310 logfile = logging.handlers.RotatingFileHandler(filename = "/tmp/beermon.log", | |
| 311 maxBytes = 1000000, backupCount = 3) | |
| 312 | |
| 313 # And stderr | |
| 314 logstderr = logging.StreamHandler() | |
| 315 | |
| 316 # Format it nicely | |
| 317 formatter = logging.Formatter(fmt = "%(asctime)s: %(message)s", datefmt = "%Y/%m/%d %H:%M:%S") | |
| 318 | |
| 319 # Glue it all together | |
| 320 logfile.setFormatter(formatter) | |
| 321 logstderr.setFormatter(formatter) | |
| 322 log.addHandler(logfile) | |
| 323 log.addHandler(logstderr) | |
| 324 return(log) | |
| 325 | |
| 0 | 326 def main(): |
|
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Wait on a condition var instead of using time.sleep() - this works
darius
parents:
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diff
changeset
|
327 import beermon |
| 1 | 328 |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
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diff
changeset
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329 global log |
|
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
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changeset
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330 log = initLog() |
| 1 | 331 |
| 332 log.debug("=== Initing ===") | |
| 4 | 333 log.debug("$Id: beermon.py,v 1.5 2007/09/28 13:05:11 darius Exp $") |
| 0 | 334 |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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335 m = None |
|
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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336 exitCode = 0 |
| 0 | 337 try: |
|
2
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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338 m = beermon.MonitorDev() |
|
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
|
339 |
| 1 | 340 c = beermon.Control(m, log) |
| 0 | 341 # Wait for the first temperature readings to come through, saves |
| 342 # getting an 'invalid data' message | |
| 343 time.sleep(3) | |
| 344 c.doit() | |
| 345 log.debug("doit exited") | |
| 346 | |
| 347 except KeyboardInterrupt: | |
| 348 log.debug("Exiting due to keyboard interrupt") | |
| 1 | 349 |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
|
350 except Exception, e: |
| 3 | 351 log.debug("Something went wrong, details below:") |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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352 log.debug(e) |
| 3 | 353 log.debug(reduce(lambda x, y: x + y, traceback.format_exception( |
| 354 sys.exc_type, sys.exc_value, sys.exc_traceback))) | |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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355 exitCode = 1 |
| 0 | 356 |
| 357 finally: | |
| 358 # Make sure we try and turn it off if something goes wrong | |
|
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17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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359 if (m != None): |
|
17bc5535bbb7
Wait on a condition var instead of using time.sleep() - this works
darius
parents:
1
diff
changeset
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360 m.setState('idle') |
| 0 | 361 |
| 1 | 362 sys.exit(exitCode) |
| 0 | 363 |
| 364 if __name__ == "__main__": | |
| 365 main() |