/
tempMon.py
123 lines (101 loc) · 3.19 KB
/
tempMon.py
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import sys
import time
import rrdtool
import threading
from segmentDisplay import segmentDisplay
from ds18b20 import ds18b20
from pid import pidpy
class segmentControl:
def __init__(self,displayId):
self.displayId=displayId
def segmentInitialise(self):
self.s=segmentDisplay(self.displayId)
time.sleep(0.2)
self.s.setupDisplay()
for i in range(1,5):
self.s.clearDisplay(i)
def segmentUpdate(self,value):
self.s=segmentDisplay(self.displayId)
if value[0] != "0":
self.s.writeDisplay(1,value[0],0)
else:
self.s.clearDisplay(1)
self.s.writeDisplay(2,value[1],0)
self.s.writeDisplay(3,value[2],1)
self.s.writeDisplay(4,value[4],0)
class thermometerControl:
def __init__(self, thermId):
self.thermId=thermId
self.temperature=-999
def temperatureRead(self):
self.t=ds18b20(self.thermId)
self.temperature=self.t.getTemp()
self.roundedTemp= '%05.1f' % round(self.temperature,1)
return self.roundedTemp
class rrdUpdate:
def __init__(self, path):
self.path=path
def rrdUpdate(self,value):
self.value=value
ret = rrdtool.update(self.path,"N:" + str(self.value));
if ret:
print rrdtool.error()
class temperatureWorker(threading.Thread):
def __init__(self,thermId,displayId,rrdPath):
super(temperatureWorker,self).__init__()
self._stop = threading.Event()
self.thermId=thermId
self.displayId=displayId
self.rrdPath=rrdPath
self.therm=thermometerControl(thermId)
self.temperature=self.therm.temperatureRead()
self.segment=segmentControl(displayId)
self.segment.segmentInitialise()
self.rrd=rrdUpdate(rrdPath)
self.pid=pidWorker(pidParams,self.temperature)
def stop(self):
self._stop.set()
def stopped(self):
return self._stop.is_set()
def run(self):
while not self.stopped():
self.temperature=self.therm.temperatureRead()
try:
self.segment.segmentUpdate(self.temperature)
except IOError,e:
raise e
self.rrd.rrdUpdate(self.temperature)
if not self.pid.isAlive():
self.pid.start()
self.pid.pidTemperature(self.temperature)
time.sleep(5)
def retTemp(self):
return self.temperature
class pidWorker(threading.Thread):
'Called from temperatureWorker'
def __init__(self,pidParams,temperature):
super(pidWorker,self).__init__()
self._stop = threading.Event()
self.pidParams=pidParams
self.pidCurrTemp=temperature
self.pid=pidpy(pidParams)
def stop(self):
self._stop.set()
def stopped(self):
return self._stop.is_set()
def pidTemperature(self,temperature):
self.pidCurrTemp=temperature
def run(self):
while not self.stopped() and pidParams['mode']==1:
print(self.pidCurrTemp)
self.time0=time.time()
print(self.pid.calcPID(self.pidCurrTemp))
self.time1=time.time()
time.sleep(pidParams['ts']-self.time1+self.time0)
if __name__ == "__main__":
thermId='28-000004e4e579'
displayId=0x3a
rrdPath='rrd/temps.rrd'
pidParams={'kc':20,'ti':100,'td':0.01,'ts':20,'tset':72,'mode':1}
w=temperatureWorker(thermId,displayId,rrdPath)
w.start()