Mercurial > templog

comparison py/fridge.py @ 166:5d5424acfed0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
- use the fridge temperature for control too, keep it in a 6deg band - ignore params beginning with _
author Matt Johnston <matt@ucc.asn.au>
date Mon, 18 Feb 2013 23:31:32 +0800
parents bf2a17873ba1
children bfc3213edee4
comparison
equal deleted inserted replaced
163:bf2a17873ba1 166:5d5424acfed0
4 import gevent 4 import gevent
5 5
6 class Fridge(gevent.Greenlet): 6 class Fridge(gevent.Greenlet):
7 7
8 OVERSHOOT_MAX_DIV = 1800.0 # 30 mins 8 OVERSHOOT_MAX_DIV = 1800.0 # 30 mins
9 FRIDGE_AIR_MIN_RANGE = 4 # ºC 9 FRIDGE_AIR_MIN_RANGE = 3 # ºC
10 FRIDGE_AIR_MAX_RANGE = 4 10 FRIDGE_AIR_MAX_RANGE = 3
11 11
12 def __init__(self, server): 12 def __init__(self, server):
13 gevent.Greenlet.__init__(self) 13 gevent.Greenlet.__init__(self)
14 self.server = server 14 self.server = server
15 self.setup_gpio() 15 self.setup_gpio()
63 params = self.server.params 63 params = self.server.params
64 64
65 fridge_min = params.fridge_setpoint - self.FRIDGE_AIR_MIN_RANGE 65 fridge_min = params.fridge_setpoint - self.FRIDGE_AIR_MIN_RANGE
66 fridge_max = params.fridge_setpoint + self.FRIDGE_AIR_MAX_RANGE 66 fridge_max = params.fridge_setpoint + self.FRIDGE_AIR_MAX_RANGE
67 67
68 wort_min = params.fridge_setpoint
68 wort_max = params.fridge_setpoint + params.fridge_difference 69 wort_max = params.fridge_setpoint + params.fridge_difference
69 70
70 off_time = self.server.now() - self.fridge_off_clock 71 off_time = self.server.now() - self.fridge_off_clock
71 72
72 if off_time < config.FRIDGE_DELAY: 73 if off_time < config.FRIDGE_DELAY:
101 overshoot = params.overshoot_factor \ 102 overshoot = params.overshoot_factor \
102 * min(self.OVERSHOOT_MAX_DIV, on_time) \ 103 * min(self.OVERSHOOT_MAX_DIV, on_time) \
103 / self.OVERSHOOT_MAX_DIV 104 / self.OVERSHOOT_MAX_DIV
104 D("on_time %(on_time)f, overshoot %(overshoot)f" % locals()) 105 D("on_time %(on_time)f, overshoot %(overshoot)f" % locals())
105 106
106 if wort is not None: 107 if wort is not None and (wort - overshoot) < params.fridge_setpoint:
107 if (wort - overshoot) < params.fridge_setpoint: 108 L("wort has cooled enough, %(wort)f" % locals() )
108 L("wort has cooled enough")
109 turn_off = True 109 turn_off = True
110 else: 110 elif fridge is not None and fridge < fridge_min:
111 # wort sensor is broken 111 W("fridge off fallback, fridge %(fridge)f, min %(fridge_min)f" % locals())
112 if fridge is not None and fridge < fridge_min:
113 W("fridge off fallback")
114 turn_off = True 112 turn_off = True
115 113
116 if turn_off: 114 if turn_off:
117 L("Turning fridge off") 115 L("Turning fridge off")
118 self.off() 116 self.off()
119 self.fridge_off_clock = self.server.now() 117 self.fridge_off_clock = self.server.now()
120 118
121 else: 119 else:
122 # fridge is off 120 # fridge is off
123 turn_on = False 121 turn_on = False
124 if wort is not None: 122 if wort is not None and wort >= wort_max:
125 if wort >= wort_max:
126 L("Wort is too hot %f, max %f" % (wort, wort_max)) 123 L("Wort is too hot %f, max %f" % (wort, wort_max))
127 turn_on = True 124 turn_on = True
128 else: 125 elif fridge is not None and fridge >= fridge_max:
129 # wort sensor is broken 126 W("frdge on fallback, fridge %(fridge)f, max %(fridge_max)f" % locals())
130 if fridge is not None and fridge >= fridge_max:
131 W("frdge on fallback")
132 turn_on = True 127 turn_on = True
133 128
134 if turn_on: 129 if turn_on:
135 L("Turning fridge on") 130 L("Turning fridge on")
136 self.on() 131 self.on()