Mercurial > templog
annotate py/fridge.py @ 527:dd8895652485
porting to asyncio
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 20 Mar 2015 20:12:25 +0800 |
parents | 9b98091ca573 |
children | a01b7bccccd3 |
rev | line source |
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1 # -*- coding: utf-8 -*- |
527 | 2 import asyncio |
3 | |
462 | 4 from utils import L,W,E,EX,D |
439 | 5 import config |
6 | |
527 | 7 import gpio |
8 | |
9 class Fridge(object): | |
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10 |
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11 OVERSHOOT_MAX_DIV = 1800.0 # 30 mins |
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12 |
443 | 13 def __init__(self, server): |
14 self.server = server | |
527 | 15 self.gpio = gpio.Gpio(config.FRIDGE_GPIO_PIN, "fridge") |
439 | 16 self.wort_valid_clock = 0 |
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17 self.fridge_on_clock = 0 |
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18 self.off() |
439 | 19 |
20 def turn(self, value): | |
527 | 21 self.gpio.turn(value) |
439 | 22 |
23 def on(self): | |
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24 self.turn(True) |
439 | 25 |
26 def off(self): | |
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27 self.turn(False) |
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28 self.fridge_off_clock = self.server.now() |
439 | 29 |
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30 def is_on(self): |
527 | 31 return self.gpio.get_state() |
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32 |
527 | 33 @asyncio.coroutine |
34 def run(self): | |
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35 if self.server.params.disabled: |
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36 L("Fridge is disabled") |
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37 while True: |
443 | 38 self.do() |
527 | 39 yield from self.server.sleep(config.FRIDGE_SLEEP) |
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40 |
444 | 41 def do(self): |
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42 """ this is the main fridge control logic """ |
443 | 43 wort, fridge = self.server.current_temps() |
439 | 44 |
444 | 45 params = self.server.params |
46 | |
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47 fridge_min = params.fridge_setpoint - params.fridge_range_lower |
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48 fridge_max = params.fridge_setpoint + params.fridge_range_upper |
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49 |
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50 wort_min = params.fridge_setpoint |
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51 wort_max = params.fridge_setpoint + params.fridge_difference |
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52 |
443 | 53 off_time = self.server.now() - self.fridge_off_clock |
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54 |
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55 if wort is not None: |
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56 self.wort_valid_clock = self.server.now() |
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57 |
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58 # Safety to avoid bad things happening to the fridge motor (?) |
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59 # When it turns off don't start up again for at least FRIDGE_DELAY |
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60 if not self.is_on() and off_time < config.FRIDGE_DELAY: |
439 | 61 L("fridge skipping, too early") |
62 return | |
63 | |
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64 if params.disabled: |
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65 if self.is_on(): |
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66 L("Disabled, turning fridge off") |
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67 self.off() |
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68 return |
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69 |
439 | 70 # handle broken wort sensor |
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71 if wort is None: |
443 | 72 invalid_time = self.server.now() - self.wort_valid_clock |
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73 W("Invalid wort sensor for %d secs" % invalid_time) |
439 | 74 if invalid_time < config.FRIDGE_WORT_INVALID_TIME: |
75 W("Has only been invalid for %d, waiting" % invalid_time) | |
76 return | |
77 | |
78 if fridge is None: | |
79 W("Invalid fridge sensor") | |
80 | |
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81 if self.is_on(): |
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82 turn_off = False |
443 | 83 on_time = self.server.now() - self.fridge_on_clock |
439 | 84 |
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85 overshoot = 0 |
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86 if on_time > params.overshoot_delay: |
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87 overshoot = params.overshoot_factor \ |
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88 * min(self.OVERSHOOT_MAX_DIV, on_time) \ |
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89 / self.OVERSHOOT_MAX_DIV |
462 | 90 D("on_time %(on_time)f, overshoot %(overshoot)f" % locals()) |
439 | 91 |
477 | 92 if not params.nowort and wort is not None: |
93 if wort - overshoot < params.fridge_setpoint: | |
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94 L("wort has cooled enough, %(wort)f" % locals() ) |
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95 turn_off = True |
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96 elif fridge is not None and fridge < fridge_min: |
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97 W("fridge off fallback, fridge %(fridge)f, min %(fridge_min)f" % locals()) |
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98 if wort is None: |
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99 W("wort has been invalid for %d" % (self.server.now() - self.wort_valid_clock)) |
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100 turn_off = True |
439 | 101 |
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102 if turn_off: |
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103 L("Turning fridge off") |
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104 self.off() |
439 | 105 |
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106 else: |
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107 # fridge is off |
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108 turn_on = False |
467 | 109 if not params.nowort \ |
110 and wort is not None \ | |
111 and wort >= wort_max: | |
462 | 112 L("Wort is too hot %f, max %f" % (wort, wort_max)) |
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113 turn_on = True |
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114 elif fridge is not None and fridge >= fridge_max: |
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115 W("frdge on fallback, fridge %(fridge)f, max %(fridge_max)f" % locals()) |
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116 turn_on = True |
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117 |
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118 if turn_on: |
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119 L("Turning fridge on") |
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120 self.on() |
457 | 121 self.fridge_on_clock = self.server.now() |