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brewNpi.py
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brewNpi.py
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from multiprocessing import Process, Pipe, Queue, current_process, Manager
from subprocess import Popen, PIPE, call
from collections import deque
from datetime import datetime
import web, time, random, json, serial, os, math, glob, copy, atexit, numpy, RPi.GPIO as GPIO
from brewTimer import brewTimer
from pid import pid, sim
from lcd import charLcd
from movingAverage import movingAverage
#GPIO Assignment
# 0(SDA)---Start Button
# 1(SCL)---Reset Button
# 4--------DS18B20 Temperature Sensor
# 7--------Next Step Button
# 8--------Alt Switch
# 9(MISO)--LCD Registr Select
#10(MOSI)--LCD Clock (Enable)
#11(SCKL)--LCD Data Bit 0
#14(TXD)---LCD Data Bit 1
#15(RXD)---LCD Data Bit 2
#17--------LCD Data Bit 3
#18(PWM)---Servoblaster
#21(PWM)---Buzzer
#22--------Spark module
#23--------Gas Solenoid Valve
#24--------Water Solenoid Valve
#25--------Pump
class gpioPins:
startButton = 0
resetButton = 1
nextButton = 7
altSwitch = 8
buzzer = 21
sparkModule = 22
gasValve = 23
waterValve = 24
pump = 25
class param:
dataLoggingStatus = "Off"
pumpStatus = 0
waterValveStatus = "Closed"
burnerStatus = "Off"
temperature = 0.0
brewMessage = "Ready"
trendData = ""
timerString = 0
pidMode = "Auto"
pidPv = 100.0
pidCv = 18.9
pidSp = 100.0
pidKpSp = 14.0
pidKiSp = 27.5
pidKdSp = 0.0
strikeTempSp = 160.0
acidMashTempSp = 0.0
acidMashTimeSp = 0
proteinMashTempSp = 0.0
proteinMashTimeSp = 0
sacchMashTempSp = 153.0
sacchMashTimeSp = 60
sacch2MashTempSp = 0.0
sacch2MashTimeSp = 0
mashOutTempSp = 168.0
mashOutTimeSp = 10.0
hotBreakTempSp = 206.0
hotBreakTimeSp = 5.0
hotBreakCvSp = 20.0
boilTimeSp = 60
boilCvSp = 40.0
hopStandTempSp = 160.0
hopStandTimeSp = 30
counterFlowTempSp = 90
trendDurationSp = 15
cvMinSp = 10.0
cvMaxSp = 80.0
pidDbSp = 0.0
shutOffTempSp = 0.5
cmdStart = False
cmdStepIncrement = False
cmdPidManual = False
cmdPidAuto = False
cmdReset = False
cmdStartDataLog = False
cmdStopDataLog = False
cmdStartPump = False
cmdStopPump = False
cmdOpenWaterValve = False
cmdCloseWaterValve = False
cmdStartBurner = False
cmdStopBurner = False
#Global Variables
cmdStartButton = False
cmdResetButton = False
cmdNextButton = False
cmdResetLcd = False
buttonTimeStamp = time.time()
def startButton(channel):
#Debounce the input to make sure that there are no false button presses
global cmdStartButton
global buttonTimeStamp
#Do not allow duplicate button presses within .2 sec of each other
if (time.time() - buttonTimeStamp) >= 0.2:
buttonTimeStamp = time.time()
count = 0
#Make sure that the button is maintained for 5 samples inorder to filter out signal noise
while (time.time() - buttonTimeStamp) <= 0.3 and count < 5:
if GPIO.input(channel) == GPIO.LOW:
count += 1
time.sleep(0.01)
if count == 5:
cmdStartButton = True
print "Start Button Pressed"
def resetButton(channel):
#Debounce the input to make sure that there are no false button presses
global cmdResetButton
global buttonTimeStamp
#Do not allow duplicate button presses within .2 sec of each other
if (time.time() - buttonTimeStamp) >= 0.2:
buttonTimeStamp = time.time()
count = 0
#Make sure that the button is maintained for 5 samples inorder to filter out signal nois
while (time.time() - buttonTimeStamp) <= 0.3 and count < 5:
if GPIO.input(channel) == GPIO.LOW:
count += 1
time.sleep(0.01)
if count == 5:
cmdResetButton = True
print "Reset Button Pressed"
def nextButton(channel):
#Debounce the input to make sure that there are no false button presses
global cmdNextButton
global buttonTimeStamp
#Do not allow duplicate button presses within .2 sec of each other
if (time.time() - buttonTimeStamp) >= 0.2:
buttonTimeStamp = time.time()
count = 0
#Make sure that the button is maintained for 5 samples inorder to filter out signal nois
while (time.time() - buttonTimeStamp) <= 0.3 and count < 5:
if GPIO.input(channel) == GPIO.LOW:
count += 1
time.sleep(0.01)
if count == 5:
cmdNextButton = True
print "Next Button Pressed"
def cleanUp():
# clean up GPIO on exit
print "Brew N Pi is now shutting down."
GPIO.cleanup()
def add_global_hook(parent_conn, statusQ):
g = web.storage({"parent_conn" : parent_conn, "statusQ" : statusQ})
def _wrapper(handler):
web.ctx.globals = g
return handler()
return _wrapper
class burner:
def __init__(self):
global cmdResetLcd
#Configure the gas solenoid valve and spark module GPIO pins for output
GPIO.setup(gpioPins.sparkModule, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(gpioPins.gasValve, GPIO.OUT, initial=GPIO.HIGH)
self.burnerStatus = 'Off'
def ignite(self):
print "Fire Spark Module"
GPIO.output(gpioPins.sparkModule, GPIO.LOW)
time.sleep(3)
print "Stop Spark Module"
GPIO.output(gpioPins.sparkModule, GPIO.HIGH)
time.sleep(3)
#Send a command to reset the LCD after turning off the spark module in case some EMI screwed up the LCD
cmdResetLcd = True
def start(self):
print "Start Burner"
#open the gas solenoid valve
GPIO.output(gpioPins.gasValve, GPIO.LOW)
#Start and Stop the Spark Module. Use a sepperate process to prevent interuptions
Spark = Process(name = "Spark", target=self.ignite)
Spark.start()
self.burnerStatus = 'On'
def stop(self):
print "Stop Burner"
#Close the gas solenoid valve
GPIO.output(gpioPins.gasValve, GPIO.HIGH)
self.burnerStatus = 'Off'
def getStatus(self):
return self.burnerStatus
class waterValve:
def __init__(self):
#Configure the water solenoid valve GPIO pin for output
GPIO.setup(gpioPins.waterValve, GPIO.OUT, initial=GPIO.HIGH)
self.openStatus = 'Closed'
def open(self):
print "Open Water Valve"
#open the water solenoid valve
GPIO.output(gpioPins.waterValve, GPIO.LOW)
self.openStatus = 'Open'
def close(self):
print "Close Water Valve"
#Close the water solenoid valve
GPIO.output(gpioPins.waterValve, GPIO.HIGH)
self.openStatus = 'Closed'
def getStatus(self):
return self.openStatus
class buzzer:
def __init__(self):
#Configure the buzzer GPIO pin for output
GPIO.setup(gpioPins.buzzer, GPIO.OUT, initial=GPIO.HIGH)
def buzz(self):
print "Start Buzzer"
GPIO.output(gpioPins.buzzer, GPIO.LOW)
time.sleep(2)
print "Stop Buzzer"
GPIO.output(gpioPins.buzzer, GPIO.HIGH)
def start(self):
#Start and Stop the Buzzer. Use a sepperate process to prevent interuptions
buzz = Process(name = "buzz", target=self.buzz)
buzz.start()
class pump:
def __init__(self):
#Configure the pump GPIO pin for output
GPIO.setup(gpioPins.pump, GPIO.OUT, initial=GPIO.HIGH)
self.runningStatus = 'Off'
def start(self):
print "Start Pump"
#Start the Pump
GPIO.output(gpioPins.pump, GPIO.LOW)
self.runningStatus = 'Running'
def stop(self):
print "Stop Pump"
#Stop the pump
GPIO.output(gpioPins.pump, GPIO.HIGH)
self.runningStatus = 'Off'
def getStatus(self):
return self.runningStatus
class servo:
def __init__(self):
self.lastPwm = 0.0
self.servoTimer = brewTimer(0.05)
self.lastPwmString = "0=0"
self.servoArray = [81.6, 82.5, 83.4, 84.3, 85.2, 86.1, 87, 87.9, 88.8, 89.7, 90.6, 91.5, 92.4, 93.3, 94.2, 95.1, 96, 96.9, 97.8, 98.7, 99.6, 100.5, 101.4, 102.3, 103.2, 104.1, 105, 105.9, 106.8, 107.7, 108.6, 109.5, 110.4, 111.3, 112.2, 113.1, 114, 114.9, 115.8, 116.7, 117.6, 118.5, 119.4, 120.3, 121.2, 122.1, 123, 123.9, 124.8, 125.7, 126.6, 127.5, 128.4, 129.3, 130.2, 131.1, 132, 132.9, 133.8, 134.7, 135.6, 136.5, 137.4, 138.3, 139.2, 140.1, 141, 141.9, 142.8, 143.7, 144.6, 145.5, 146.4, 147.3, 148.2, 149.1, 150, 150.9, 151.8, 152.7, 153.6, 154.5, 155.4, 156.3, 157.2, 158.1, 159, 159.9, 160.8, 161.7, 162.6, 163.5, 164.4, 165.3, 166.2, 167.1, 168, 168.9, 169.8, 170.7, 171.6, 172.5, 173.4, 174.3, 175.2, 176.1, 177, 177.9, 178.8, 179.7, 180.6, 181.5, 182.4, 183.3, 184.2, 185.1, 186, 186.9, 187.8, 188.7, 189.6, 190.5, 191.4, 192.3, 193.2, 194.1, 195, 195.9, 196.8, 197.7, 198.6, 199.5, 200.4, 201.3, 202.2, 203.1, 204, 204.9, 205.8, 206.7, 207.6, 208.5, 209.4, 210.3, 211.2, 212.1, 213, 213.9, 214.8, 215.7, 216.6, 217.5, 218.4, 219.3, 220.2, 221.1, 222, 222.9, 223.8, 224.7, 225.6, 226.5, 227.4, 228.3, 229.2, 230.1, 231, 231.9, 232.8, 233.7, 234.6, 235.5, 236.4, 237.3, 238.2, 239.1, 240]
self.pidOutputArray = [0, 1.3036970989, 3.2092900545, 5.0688080436, 6.8834821031, 8.6545195541, 10.3831042193, 12.0703966407, 13.717534298, 15.3256318259, 16.8957812321, 18.429052115, 19.9264918818, 21.3891259662, 22.8179580461, 24.2139702613, 25.578123432, 26.9113572758, 28.2145906259, 29.488721649, 30.734628063, 31.9531673548, 33.1451769983, 34.3114746719, 35.4528584767, 36.5701071539, 37.6639803031, 38.7352185998, 39.7845440133, 40.8126600245, 41.8202518437, 42.8079866286, 43.776513702, 44.7264647694, 45.6584541375, 46.573078931, 47.4709193113, 48.3525386941, 49.218483967, 50.0692857074, 50.9054584004, 51.7275006567, 52.5358954304, 53.3311102365, 54.113597369, 54.8837941191, 55.642122992, 56.3889919258, 57.1247945088, 57.8499101971, 58.5647045332, 59.2695293627, 59.9647230534, 60.6506107121, 61.3275044028, 61.9957033648, 62.6554942298, 63.3071512406, 63.9509364683, 64.5871000304, 65.2158803083, 65.8375041657, 66.4521871659, 67.0601337898, 67.6615376538, 68.2565817275, 68.8454385515, 69.4282704556, 70.005229776, 70.5764590735, 71.1420913515, 71.7022502733, 72.2570503803, 72.8065973099, 73.3509880131, 73.8903109721, 74.4246464187, 74.9540665519, 75.4786357553, 75.9984108156, 76.51344114, 77.023768974, 77.5294296196, 78.0304516526, 78.5268571407, 79.0186618617, 79.5058755204, 79.9885019673, 80.466539416, 80.939980661, 81.4088132959, 81.8730199306, 82.3325784097, 82.78746203, 83.2376397586, 83.6830764503, 84.1237330657, 84.5595668892, 84.9905317463, 85.4165782221, 85.8376538783, 86.2537034719, 86.6646691725, 87.07049078, 87.4711059428, 87.8664503756, 88.2564580769, 88.6410615471, 89.0201920063, 89.3937796119, 89.7617536766, 90.1240428865, 90.4805755183, 90.8312796576, 91.1760834165, 91.5149151516, 91.8477036816, 92.1743785055, 92.4948700197, 92.8091097369, 93.1170305028, 93.4185667146, 93.7136545388, 94.0022321288, 94.2842398427, 94.5596204613, 94.828319406, 95.0902849562, 95.3454684676, 95.5938245898, 95.835311484, 96.0698910412, 96.2975290996, 96.5181956627, 96.7318651169, 96.9385164497, 97.1381334671, 97.3307050117, 97.5162251804, 97.6946935421, 97.866115356, 98.0305017888, 98.1878701329, 98.3382440242, 98.4816536598, 98.618136016, 98.7477350659, 98.8705019973, 98.9864954308, 99.095781637, 99.1984347549, 99.2945370098, 99.3841789303, 99.467459567, 99.5444867101, 99.6153771068, 99.6802566796, 99.7392607441, 99.7925342265, 99.8402318816, 99.8825185108, 99.9195691795, 99.9515694355, 99.9787155262, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100]
def cmdPosition(self, value):
#convert from percentage to pwm value. pwm is in units of 10 microseconds
#pwm = value * (180.0 / 100.0) + 60.0
#Interpolate the servo and PID CV arrays to determine the proper pwm value for the servo
pwm = numpy.interp(value, self.pidOutputArray, self.servoArray)
#Round the servo pwm value to the nearest integer.
pwmInt = int(pwm + .5)
#print 'servo = {0}'.format(pwmInt)
if pwmInt <> self.lastPwm:
#Start a 3 second tiemr whenever a new value is written to the servo
self.servoTimer = brewTimer(0.05)
self.lastPwm = pwmInt
if self.servoTimer.isDone():
#Deactivate the servo if the command hasn't changed for more than 3 seconds
pwmString = "0=0"
else:
pwmString = '0={0}'.format(pwmInt)
if pwmString <> self.lastPwmString:
try:
f = open("/dev/servoblaster","w")
f.write(pwmString + "\n")
f.flush()
f.close()
print("Writing to servoblaster: " + pwmString)
except:
print("Error writing to servoblaster: " + pwmString)
self.lastPwmString = pwmString
def cmdStop(self):
pwmString = "0=0"
try:
f = open("/dev/servoblaster","w")
f.write(pwmString + "\n")
f.flush()
f.close()
except:
print("Error writing to servoblaster: " + pwmString)
class ds18b20:
def __init__(self):
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')
self.tempLast = 0.0
##--- create a dictionary via Manager
manager = Manager()
self.probe = manager.dict()
self.probe["temperature"] = 0.0
#use a moving average to average the last 14 tmperature readings.
self.mAvg = movingAverage(14)
##--- start process and send dictionary
p = Process(target=self.readLoop, args=(self.probe, ))
p.start()
def readRaw(self, device_file):
f = open(device_file, 'r')
lines = f.readlines()
f.close()
return lines
def readLoop(self, probe):
base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'
while (True):
lines = self.readRaw(device_file)
#print lines
while lines[0].strip()[-3:] != 'YES':
time.sleep(0.2)
lines = self.readRaw(device_file)
equals_pos = lines[1].find('t=')
if equals_pos != -1:
temp_string = lines[1][equals_pos+2:]
temp_c = float(temp_string) / 1000.0
temp_f = temp_c * 9.0 / 5.0 + 32.0
#The DS18B20 will return 185 deg if it is reset. Therefore, filter out the 185 if it is not real
if temp_f == 185.0 and math.fabs(self.tempLast - 185.0) > 2.0:
probe["temperature"] = self.mAvg(self.tempLast)
else:
probe["temperature"] = self.mAvg(temp_f)
self.tempLast = temp_f
time.sleep(.75)
def read(self):
#The DS18B20 will return 185 deg if it is reset. Therefore, filter out the 185 if it is not real
if self.probe["temperature"] == 185.0 and math.fabs(self.tempLast - 185.0) > 2.0:
return self.tempLast
self.tempLast = self.probe["temperature"]
return self.probe["temperature"]
class dataLogging:
def __init__(self):
self.logFileStatus = "Off"
self.currentTimeLast = 0.0
self.sysTimeLast = 0.0
self.tempLast = 0.0
self.trendTempLast = 0.0
self.spLast = 0.0
self.trendSpLast = 0.0
self.cvLast = 0.0
self.trendCvLast = 0.0
self.brewStepLast = " "
self.timerStringLast = " "
self.logWriteFlag = False
self.trendWriteFlag = False
self.startTime = time.time()
self.fileName = "loggFileName"
self.dataQueue = deque(maxlen=5000)
def cmdStartLogFile(self):
if self.logFileStatus != "On":
self.logFileStatus = "On"
self.startTime = time.time()
localTime = time.localtime()
self.fileName = '/home/pi/Python/DataLogs/{0:04d}-{1:02d}-{2:02d} {3:02d}_{4:02d}_{5:02d} BrewNpi Data Log.csv'.format(localTime.tm_year, localTime.tm_mon, localTime.tm_mday, localTime.tm_hour, localTime.tm_min, localTime.tm_sec)
self.writeData("Time", "Brew Step", "Brew Timer", "Temperature", "PID SP", "PID CV")
def cmdStopLogFile(self):
self.logFileStatus = "Off"
def getLogFileStatus(self):
return self.logFileStatus
def writeData(self, time, brewStep, timerString, temperature, sp, cv):
#write Data to log file
logString = '{0},{1},{2},{3},{4},{5}'.format(time, brewStep, timerString, temperature, sp, cv)
f = open(self.fileName, 'a')
f.write(logString + "\n")
f.flush()
f.close()
def getTrendJson(self, trendDurationSp):
timeList = []
tempList = []
spList = []
cvList = []
#Multiply the python time in seconds by 1000 to get millisecons for javascript
currentTime = time.time() * 1000
#iterate through all of the data
index = 0
for dataSet in self.dataQueue:
#calculate how many dada sets are within the time duration
if (currentTime - dataSet[0]) <= (trendDurationSp * 60000.0):
index += 1
#set the index to the most resent data if there is not any data within the duration setpoint
if index == 0:
index = len(self.dataQueue) - 1
#Do not allow the index to be greater than or equal to the dataQueue size
elif index >= len(self.dataQueue):
index = 0
else:
#subtract the number of data sets that are within the time duration from the total number of data sets
index = len(self.dataQueue) - index
#The first and last datasets will be added to the json string so the duration will exactly equal the duration setpoint
#Add the oldest dataset to the begining of the list that corresponds to the current time minus the duration setpoint
timeList.append(currentTime - (trendDurationSp * 60000.0))
tempList.append(copy.copy(self.dataQueue[index][1]))
spList.append(copy.copy(self.dataQueue[index][2]))
cvList.append(copy.copy(self.dataQueue[index][3]))
#iterate through all of the data
index = 0
for dataSet in self.dataQueue:
#Create seperate lists for each type of data
if (currentTime - dataSet[0]) <= (trendDurationSp * 60000.0):
timeList.append(copy.copy(dataSet[0]))
tempList.append(copy.copy(dataSet[1]))
spList.append(copy.copy(dataSet[2]))
cvList.append(copy.copy(dataSet[3]))
index += 1
#Add the latest data set to the end of the lists
index = len(self.dataQueue) - 1
timeList.append(copy.copy(currentTime))
tempList.append(copy.copy(self.dataQueue[index][1]))
spList.append(copy.copy(self.dataQueue[index][2]))
cvList.append(copy.copy(self.dataQueue[index][3]))
#create the json string
jsonString = """[{"label": "Temperature = xxx.xx @hh:mm:ss xM", "data": ["""
for index in range(len(timeList)):
if index != 0:
jsonString += ", "
jsonString += '[{0:.0f},{1}]'.format(timeList[index], tempList[index])
jsonString += """]}, {"label": "Setpoint = xxx.xx", "data": ["""
for index in range(len(timeList)):
if index != 0:
jsonString += ", "
jsonString += '[{0:.0f},{1}]'.format(timeList[index], spList[index])
jsonString += """]}, {"label": "CV = xxx.xx", "data": ["""
for index in range(len(timeList)):
if index != 0:
jsonString += ", "
jsonString += '[{0:.0f},{1}]'.format(timeList[index], cvList[index])
jsonString += '], "yaxis": 2}]'
return jsonString
def logData(self, brewStep, timerString, temperature, sp, cv):
currentTime = time.time() - self.startTime
sysTime = time.time()
#Log data for the lof file
#Log the Current and last data sets if any of the data has changed
if temperature != self.tempLast or sp != self.spLast or abs(cv - self.cvLast) >= 0.1:
#Only write the last data if the same data was not written the last time the function was called
if self.logWriteFlag:
if self.logFileStatus == "On":
self.writeData(self.currentTimeLast, self.brewStepLast, self.timerStringLast, self.tempLast, self.spLast, self.cvLast)
if self.logFileStatus == "On":
self.writeData(currentTime, brewStep, timerString, temperature, sp, cv)
#set a write flag to eliminate double entries when the data is changing every time the log function is called
self.logWriteFlag = False
else:
self.logWriteFlag = True
self.currentTimeLast = copy.copy(currentTime)
self.brewStepLast = copy.copy(brewStep)
self.timerStringLast = copy.copy(timerString)
self.tempLast = copy.copy(temperature)
self.spLast = copy.copy(sp)
self.cvLast = copy.copy(cv)
#Log data for trending
#Log the Current and last data sets if any of the data has changed
if (temperature != self.trendTempLast or sp != self.trendSpLast or abs(cv - self.trendCvLast) >= 0.1) and (sysTime - self.sysTimeLast) >= 1.0:
#Only write the last data if the same data was not written the last time the function was called
if self.trendWriteFlag:
self.dataQueue.append([copy.copy(self.sysTimeLast * 1000), copy.copy(self.trendTempLast), copy.copy(self.trendSpLast), copy.copy(self.trendCvLast)])
self.dataQueue.append([copy.copy(sysTime * 1000), copy.copy(temperature), copy.copy(sp), copy.copy(cv)])
#set a write flag to eliminate double entries when the data is changing every time the log function is called
self.trendWriteFlag = False
else:
self.trendWriteFlag = True
if (sysTime - self.sysTimeLast) >= 1.0:
self.sysTimeLast = copy.copy(sysTime)
self.trendTempLast = copy.copy(temperature)
self.trendSpLast = copy.copy(sp)
self.trendCvLast = copy.copy(cv)
class brewNpi:
def GET(self):
return render.brewNpi()
class brewControl:
def GET(self):
return render.brewControl()
class brewTrend:
def GET(self):
return render.brewTrend()
class brewSetup:
def GET(self):
return render.brewSetup()
def ProcessControl(dataLoggingStatus, pumpStatus, waterValveStatus, burnerStatus, temperature, brewMessage, trendData, timerString, pidMode, pidPv, pidCv, pidSp, pidKpSp, \
pidKiSp, pidKdSp, strikeTempSp, acidMashTempSp, acidMashTimeSp, proteinMashTempSp, proteinMashTimeSp, sacchMashTempSp, sacchMashTimeSp, \
sacch2MashTempSp, sacch2MashTimeSp, mashOutTempSp, mashOutTimeSp, hotBreakTempSp, hotBreakTimeSp, hotBreakCvSp, boilTimeSp, boilCvSp, \
hopStandTempSp, hopStandTimeSp, counterFlowTempSp, trendDurationSp, cvMinSp, cvMaxSp, pidDbSp, shutOffTempSp, cmdStart, cmdStepIncrement, cmdPidManual, cmdPidAuto, cmdReset, cmdStartDataLog, \
cmdStopDataLog, cmdStartPump, cmdStopPump, cmdOpenWaterValve, cmdCloseWaterValve, cmdStartBurner, cmdStopBurner, statusQ, conn):
p = current_process()
#Set the GPIO to use the BCM pin numbers
GPIO.setmode(GPIO.BCM)
#register the cleanUp routine to be executed on exit
atexit.register(cleanUp)
incDec = 1
brewStep = "Ready"
brewStepLast = " "
timerString = "00:00:00"
lcdMessage = "Brew N Pi"
lcdLabel = "Temp. SP "
lcdTimerLable = "Temp. Timer"
lcdTempLable = "Temp. SP "
lcdData = " "
lcdString = " "
lcdStringLast = " "
burner1 = burner()
pump1 = pump()
waterValve1 = waterValve()
buzzer1 = buzzer()
temperature1 = ds18b20()
pvMin = 32.0
pvMax = 212.0
ignitionCv = 40.0
tempLast = 0.0
degree = chr(223)
burnerShutOff = False
burnerTurnDown = False
global cmdStartButton
global cmdResetButton
global cmdNextButton
global cmdResetLcd
pidController = pid(pvMin, pvMax)
pvSim = sim()
dataLogger = dataLogging()
servoController = servo()
lcd = charLcd()
#lcd.writeMsg("Brew N Pi" + "\n" + "Testing")
#Configure the button and switch gpio pins for pull up inputs
GPIO.setup(gpioPins.startButton, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(gpioPins.nextButton, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(gpioPins.resetButton, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(gpioPins.altSwitch, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#add detections events to the buttons and the switch
GPIO.add_event_detect(gpioPins.startButton, GPIO.FALLING, callback=startButton, bouncetime=500)
GPIO.add_event_detect(gpioPins.nextButton, GPIO.FALLING, callback=nextButton, bouncetime=500)
GPIO.add_event_detect(gpioPins.resetButton, GPIO.FALLING, callback=resetButton, bouncetime=500)
while (True):
while conn.poll(): #POST settings
dataLoggingStatus, pumpStatus, waterValveStatus, burnerStatus, temperature, brewMessage, trendData, timerString, pidMode, pidPv, pidCv, pidSp, pidKpSp, \
pidKiSp, pidKdSp, strikeTempSp, acidMashTempSp, acidMashTimeSp, proteinMashTempSp, proteinMashTimeSp, sacchMashTempSp, sacchMashTimeSp, \
sacch2MashTempSp, sacch2MashTimeSp, mashOutTempSp, mashOutTimeSp, hotBreakTempSp, hotBreakTimeSp, hotBreakCvSp, boilTimeSp, boilCvSp, \
hopStandTempSp, hopStandTimeSp, counterFlowTempSp, trendDurationSp, cvMinSp, cvMaxSp, pidDbSp, shutOffTempSp, cmdStart, cmdStepIncrement, cmdPidManual, cmdPidAuto, cmdReset, cmdStartDataLog, \
cmdStopDataLog, cmdStartPump, cmdStopPump, cmdOpenWaterValve, cmdCloseWaterValve, cmdStartBurner, cmdStopBurner = conn.recv()
temperature = temperature1.read()
pidPv = temperature
#if tempLast != temperature:
# lcd.writeMsg('Temperature \n{0:.1f}{1}F\n'.format(temperature,degree))
#tempLast = copy.copy(temperature)
#Update the PID calc and set the cv in auto mode. Only update the calc in manual mode
if pidController.getMode() == "Auto" or pidController.getMode() == "Initialize":
pidCv = pidController.doCalc(pidPv, pidSp, pidKpSp, pidKiSp, pidKdSp, cvMinSp, cvMaxSp, pidDbSp)
else:
pidController.doCalc(pidPv, pidSp, pidKpSp, pidKiSp, pidKdSp, cvMinSp, cvMaxSp, pidDbSp)
#turn on the data logger
if cmdStartDataLog:
dataLogger.cmdStartLogFile()
cmdStartDataLog = False
#turn off the data logger
if cmdStopDataLog:
dataLogger.cmdStopLogFile()
cmdStopDataLog = False
dataLoggingStatus = dataLogger.getLogFileStatus()
#Log data for trending and to csv file
dataLogger.logData(brewStep, timerString, temperature, pidSp, pidCv)
#Get the JSON string for trending
trendData = dataLogger.getTrendJson(trendDurationSp)
#Write the pidCv to the servo
servoController.cmdPosition(pidCv)
if cmdPidManual:
pidController.cmdManual(pidCv)
cmdPidManual = False
if cmdPidAuto:
pidController.cmdAuto()
cmdPidAuto = False
pidMode = pidController.getMode()
#Send updated CV values to the PID controller while in Manual mode
if pidMode == "Manual":
pidController.cmdManual(pidCv)
#Handle web start and stop commands
if cmdStartPump:
pump1.start()
cmdStartPump = False
if cmdStopPump:
pump1.stop()
cmdStopPump = False
if cmdStartBurner:
pidController.cmdInitialize(ignitionCv, pidCv)
burner1.start()
cmdStartBurner = False
if cmdStopBurner:
burner1.stop()
cmdStopBurner = False
if cmdOpenWaterValve:
waterValve1.open()
cmdOpenWaterValve = False
if cmdCloseWaterValve:
waterValve1.close()
cmdCloseWaterValve = False
#Temperature Simulation. Uncomment to simulate a temp response from the PID CV
#pidPv = pvSim.getTemp(pidCv)
#temperature = pidPv
#Handle the physical button press events
if cmdStartButton:
cmdStart = True
cmdStartButton = False
if cmdResetButton:
cmdReset = True
cmdResetButton = False
if cmdNextButton:
cmdStepIncrement = True
cmdNextButton = False
#Reinitialize the LCD if the start or reset commands are presed multiple times, or after the spark module is fired
if (cmdStart and brewStep != "Ready") or (cmdReset and brewStep == "Ready") or cmdResetLcd:
lcd = charLcd()
lcd.writeMsg(lcdString)
cmdStart = False
cmdResetLcd = False
if brewStep == "Ready":
cmdStepIncrement = False
if cmdStart:
pidSp = strikeTempSp
#pidCv = copy.copy(ignitionCv)
pidController.cmdInitialize(ignitionCv, cvMaxSp)
pump1.start()
burner1.start()
cmdStart = False
brewStep = "Heat for Strike"
if brewStep == "Heat for Strike":
#Turn down the burner to minimum when the temperature is within .7 deg of the setpoint.
if temperature >= (strikeTempSp - 0.7) and burnerTurnDown == False:
pidController.cmdAuto()
pidController.cmdInitialize(cvMinSp, cvMinSp)
burnerTurnDown = True
if temperature >= strikeTempSp or cmdStepIncrement:
burner1.stop()
cmdStepIncrement = False
buzzer1.start()
burnerTurnDown = False
brewStep = "Dough In"
if brewStep == "Dough In":
if cmdStepIncrement:
pidSp = acidMashTempSp
acidMashTimer = brewTimer(acidMashTimeSp)
#pidCv = copy.copy(ignitionCv)
pidController.cmdInitialize(ignitionCv, cvMinSp)
burner1.start()
cmdStepIncrement = False
brewStep = "Acid Rest Mash"
if brewStep == "Acid Rest Mash":
if cmdStepIncrement:
acidMashTimer.cmdIncrement()
cmdStepIncrement = False
timerString = acidMashTimer.getTimerString()
if acidMashTimer.isDone():
pidSp = proteinMashTempSp
brewStep = "Heat for Protein Rest"
if brewStep == "Heat for Protein Rest":
if temperature >= proteinMashTempSp or cmdStepIncrement:
proteinMashTimer = brewTimer(proteinMashTimeSp)
cmdStepIncrement = False
brewStep = "Protein Rest Mash"
if brewStep == "Protein Rest Mash":
if cmdStepIncrement:
proteinMashTimer.cmdIncrement()
cmdStepIncrement = False
timerString = proteinMashTimer.getTimerString()
if proteinMashTimer.isDone():
pidSp = sacchMashTempSp
brewStep = "Heat for Sacch Rest"
if brewStep == "Heat for Sacch Rest":
if temperature >= sacchMashTempSp or cmdStepIncrement:
sacchMashTimer = brewTimer(sacchMashTimeSp)
cmdStepIncrement = False
brewStep = "Sacch Rest Mash"
if brewStep == "Sacch Rest Mash":
if cmdStepIncrement:
sacchMashTimer.cmdIncrement()
cmdStepIncrement = False
timerString = sacchMashTimer.getTimerString()
if sacchMashTimer.isDone():
pidSp = sacch2MashTempSp
brewStep = "Heat for Sacch Rest 2"
if brewStep == "Heat for Sacch Rest 2":
if temperature >= sacch2MashTempSp or cmdStepIncrement:
sacch2MashTimer = brewTimer(sacch2MashTimeSp)
cmdStepIncrement = False
brewStep = "Sacch Rest 2 Mash"
if brewStep == "Sacch Rest 2 Mash":
if cmdStepIncrement:
sacch2MashTimer.cmdIncrement()
cmdStepIncrement = False
timerString = sacch2MashTimer.getTimerString()
if sacch2MashTimer.isDone():
pidSp = mashOutTempSp
brewStep = "Heat for Mash Out"
if brewStep == "Heat for Mash Out":
#Turn down the burner to minimum when the temperature is within .7 deg of the setpoint.
if temperature >= (mashOutTempSp - 0.7) and burnerTurnDown == False:
pidController.cmdInitialize(cvMinSp, cvMinSp)
burnerTurnDown = True
if temperature >= mashOutTempSp or cmdStepIncrement:
mashOutTimer = brewTimer(mashOutTimeSp)
cmdStepIncrement = False
burnerTurnDown = False
brewStep = "Mash Out"
if brewStep == "Mash Out":
if cmdStepIncrement:
mashOutTimer.cmdIncrement()
cmdStepIncrement = False
timerString = mashOutTimer.getTimerString()
if mashOutTimer.isDone():
burner1.stop()
pump1.stop()
buzzer1.start()
brewStep = "Squeeze"
if brewStep == "Squeeze":
if cmdStepIncrement:
pidCv = copy.copy(ignitionCv)
pidController.cmdManual(pidCv)
pidController.cmdInitialize(ignitionCv, cvMaxSp)
pump1.start()
burner1.start()
cmdStepIncrement = False
brewStep = "Heat for Boil"
if brewStep == "Heat for Boil":
if temperature >= hotBreakTempSp or cmdStepIncrement:
cmdStepIncrement = False
buzzer1.start()
pidCv = copy.copy(hotBreakCvSp)
hotBreakTimer = brewTimer(hotBreakTimeSp)
brewStep = "Hot Break Control"
if brewStep == "Hot Break Control":
if cmdStepIncrement:
hotBreakTimer.cmdIncrement()
cmdStepIncrement = False
timerString = hotBreakTimer.getTimerString()
if hotBreakTimer.isDone():
buzzer1.start()
pidCv = copy.copy(boilCvSp)
brewStep = "Bring to Boil"
if brewStep == "Bring to Boil":
if temperature >= 212.0 or cmdStepIncrement:
cmdStepIncrement = False
pump1.stop()
buzzer1.start()
brewStep = "Boil"
if brewStep == "Boil":
if cmdStepIncrement:
boilTimer = brewTimer(boilTimeSp)
boilPumpOffTimer = brewTimer(5.0)
boilPumpOnTimer = brewTimer(0.15)
cmdStepIncrement = False
brewStep = "Timed Boil"
if brewStep == "Timed Boil":
if cmdStepIncrement:
boilTimer.cmdIncrement()
cmdStepIncrement = False
timerString = boilTimer.getTimerString()
#Start the pump every 5 minutes for 6 seconds to mix the wort in the tube
if boilPumpOffTimer.isDone() and pump1.getStatus() == "Off":
pump1.start()
boilPumpOffTimer = brewTimer(5.0)
boilPumpOnTimer = brewTimer(0.15)
if boilPumpOnTimer.isDone() and pump1.getStatus() == "Running":
pump1.stop()
if boilTimer.isDone():
burner1.stop()
pump1.start()
buzzer1.start()
immersionDelayTimer = brewTimer(0.5)
brewStep = "Immersion Chiller"
if brewStep == "Immersion Chiller":
if (temperature <= hopStandTempSp and immersionDelayTimer.isDone()) or cmdStepIncrement:
cmdStepIncrement = False
hopStandTimer = brewTimer(hopStandTimeSp)
if hopStandTimeSp != 0.0:
buzzer1.start()
brewStep = "Hop Stand"
if brewStep == "Hop Stand":
if cmdStepIncrement:
hopStandTimer.cmdIncrement()
cmdStepIncrement = False
timerString = hopStandTimer.getTimerString()
if hopStandTimer.isDone():
brewStep = "Immersion Chilling"
if brewStep == "Immersion Chilling":
if temperature <= counterFlowTempSp or cmdStepIncrement:
cmdStepIncrement = False
buzzer1.start()
pump1.stop()
brewStep = "Connect CF Heat Exchanger"
if brewStep == "Connect CF Heat Exchanger":
if cmdStepIncrement:
cmdStepIncrement = False
waterValve1.open()
pump1.start()
brewStep = "Wort Transfer"
if cmdReset:
burner1.stop()
waterValve1.close()
pump1.stop()
brewStep = "Ready"
timerString = "00:00:00"
cmdReset = False
cmdStart = False
cmdStepIncrement = False
#Create the Brew Message based on the brew step
if brewStep == "Ready":
brewMessage = "Press Start<br>to Begin"
elif brewStep == "Heat for Strike":
brewMessage = "Heat the Strike Water<br>to {0}°F".format(strikeTempSp)
elif brewStep == "Dough In":
brewMessage = "Dough In and Stir Well<br>Press Next Step to Continue"
elif brewStep == "Acid Rest Mash":
brewMessage = "Acid Rest<br>Timed Mash"
elif brewStep == "Heat for Protein Rest":
brewMessage = "Heat the Mash to {0}°F<br>For the Protein Rest".format(proteinMashTempSp)
elif brewStep == "Protein Rest Mash":
brewMessage = "Protein Rest<br>Timed Mash"
elif brewStep == "Heat for Sacch Rest":
brewMessage = "Heat the Mash to {0}°F<br>For the Sacch Rest".format(sacchMashTempSp)
elif brewStep == "Sacch Rest Mash":
brewMessage = "Sacch Rest<br>Timed Mash"
elif brewStep == "Heat for Sacch Rest 2":
brewMessage = "Heat the Mash to {0}°F<br>For the 2nd Sacch Rest".format(sacch2MashTempSp)
elif brewStep == "Sacch Rest 2 Mash":
brewMessage = "Second Sacch Rest<br>Timed Mash"
elif brewStep == "Heat for Mash Out":
brewMessage = "Heat the Mash to {0}°F<br>For the Mash Out".format(mashOutTempSp)
elif brewStep == "Mash Out":
brewMessage = "Hold Temperature<br>for Timed Mash Out"
elif brewStep == "Squeeze":
brewMessage = "Remove the Grains from<br>the Wort and Squeeze!!!"
elif brewStep == "Heat for Boil":
brewMessage = "Heat the Wort<br>for the Boil"
elif brewStep == "Hot Break Control":
brewMessage = "Reduce the Burner Output<br>to Control the Hot Break"
elif brewStep == "Bring to Boil":
brewMessage = "Heat the Wort<br>for the Boil"
elif brewStep == "Boil":
brewMessage = "The Wort is boiling<br>Press Next for Timed Boil"
elif brewStep == "Timed Boil":
brewMessage = "Timed Boil"
elif brewStep == "Immersion Chiller":
if hopStandTimeSp == 0.0:
brewMessage = "Chill to {0}°F Using<br>the Immersion Chiller".format(counterFlowTempSp)
else:
brewMessage = "Chill to {0}°F Using<br>the Immersion Chiller".format(hopStandTempSp)
elif brewStep == "Hop Stand":
brewMessage = "Hold the Temperature<br>for a Timed Hop Stand"
elif brewStep == "Immersion Chilling":
brewMessage = "Chill to {0}°F Using<br>the Immersion Chiller".format(counterFlowTempSp)
elif brewStep == "Connect CF Heat Exchanger":
brewMessage = "Connect CF Heat Exchanger<br>Press Next Step to Continue"
elif brewStep == "Wort Transfer":
brewMessage = "Transfer the Wort<br>to the Fermenter"
else:
brewMessage = "Oh Shit!!!<br>The Program is Fucked!!!"
#Create the LCD Message based on the brew step
if brewStep == "Ready":
lcdMessage = " Press Start \n to Begin \n"
lcdData = ""
elif brewStep == "Heat for Strike":
lcdMessage = " Heat Strike \n Water to {0}{1}F \n".format(strikeTempSp,degree)
lcdLabel = copy.copy(lcdTempLable)
lcdData = "{0}{1}F".format(strikeTempSp,degree)
elif brewStep == "Dough In":
lcdMessage = " Dough In \n and Stir \n"
lcdData = ""
elif brewStep == "Acid Rest Mash":
lcdMessage = " Acid Rest \n Timed Mash \n"
lcdLabel = copy.copy(lcdTimerLable)
lcdData = acidMashTimer.getSmallTimerString()
elif brewStep == "Heat for Protein Rest":
lcdMessage = " Heat to {0}{1}F \nFor Protein Rest\n".format(proteinMashTempSp,degree)
lcdLabel = copy.copy(lcdTempLable)
lcdData = "{0}{1}F".format(proteinMashTempSp,degree)