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pyRoast.py
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pyRoast.py
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#!/usr/bin/python
###################################
# pyRoast - Coffee roasting profile
# (C) Andrew Tridgell 2009
# Released under GNU GPLv3 or later
from pyRoastUI import *
from PyKDE4.kdeui import KPlotObject
import time, os, subprocess, signal, select, csv, serial
from PyKDE4.kio import KFileDialog
from PyKDE4.kdecore import KUrl
from PyQt4.QtGui import QFileDialog
import getopt, sys, math, re, glob
import matplotlib
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
from matplotlib.figure import Figure
# a few constants
gTempArraySize = 5
gUpdateFrequency = 1.25
gPlotColor = QtGui.QColor(255, 128, 128)
gProfileColor = QtGui.QColor(10, 50, 255)
gMaxTime = 20.0
gMaxTemp = 400
gVersion = "0.1"
rmr = "./RawMeterReader"
simulate_temp = False
time_speedup = 1
pcontrol = None
pcontrol_dev = None
profile_file = None
verbose = False
PID_integral = 0
PID_previous_error = 0
PID_lastt = 0
PID_Kp = 0.5
PID_Ki = 2
PID_Kd = 0.8
current_power = 100
sim_last_time = 0
sim_last_temp = 0
sim_base_temp = 29.0
######################
# get the elapsed time
def ElapsedTime():
global StartTime
return time_speedup*(time.time() - StartTime)
#############################
# current time in mm:ss form
def TimeString():
elapsed = ElapsedTime()/60.0
return ("%2u:%02u" % (int(elapsed), (elapsed - int(elapsed))*60))
############################
# write a message to the msg
# window, prefixed by the time
def AddMessage(m):
ui.tMessages.append(TimeString() + " " + m)
def DebugMessage(m):
global verbose
if (verbose):
AddMessage(m)
############################
# reset the plot
def bReset():
global StartTime, CurrentTemperature, MaxTemperature, sim_last_time, TemperatureArray
StartTime = time.time()
sim_last_time = 0
dmmPlot.clearPoints()
CurrentTemperature = 0
MaxTemperature = 0
TemperatureArray = []
ui.tMessages.setText("")
ui.TemperaturePlot.update()
############################
# called when a roast event comes on
def bEvent(estring):
elapsed = ElapsedTime()/60.0
dmmPlot.addPoint(elapsed, CurrentTemperature, estring)
AddMessage(estring)
def bFirstCrack():
bEvent("First crack")
def bRollingFirstCrack():
bEvent("Rolling first crack")
def bSecondCrack():
bEvent("Second crack")
def bRollingSecondCrack():
bEvent("Rolling second crack")
def bUnload():
bEvent("Unload")
###########################
# useful fn to see if a string
# is a number
def isNumber(s):
try:
v = float(s)
except:
return False
return True
###########################
# work out the profile temperature
# given a time
def ProfileTemperature():
global LoadedProfile
elapsed = ElapsedTime()/60.0
points = LoadedProfile.points()
for p in points:
if (p.x() >= elapsed):
return p.y()
return 0.0
###########################
# load an existing CSV
# as a profile plot
def LoadProfile():
# global LoadedProfile
filename = ui.tLoadFile.currentText()
f1 = open('Roasts/'+ui.tLoadFile.currentText(),'r')
lines = f1.readlines()
f1.close()
coffee = False
notes = False
temps = False
RoastNotes = ""
for line in lines:
match1 = re.search("Coffee:",line)
match2 = re.search("Notes:",line)
match3 = re.search("Time,",line)
if match1:
coffee = True
if match2:
line = '\n'+line
notes = True
if match3:
temps = True
if coffee and not notes:
RoastNotes += line
if notes and not temps:
RoastNotes += line
ui.tLoadNotes.setText(RoastNotes)
reader = csv.reader(open('Roasts/'+filename))
LoadedProfile.clearPoints()
for p in reader:
if p:
if (isNumber(p[0])):
label = p[2]
if (isNumber(label)):
label = ""
LoadedProfile.addPoint(float(p[0])/60.0, float(p[1]), label);
ui.TemperaturePlot.update()
###########################
# load a profile via GUI
def bLoadProfile():
global LoadedProfile
filename = QFileDialog.getOpenFileName(pyRoast, "Profile File", "", "*.csv")
if (filename == ""):
return
LoadProfile(filename)
###########################
# save the data
def bSave():
points = dmmPlot.points()
fname = str(ui.coffee.text());
if (fname == ""):
AddMessage("Please choose a file name")
return
if (fname.find('.') == -1):
fname += ".csv";
f = open('Roasts/'+fname, 'w')
AddMessage("Saving %u points to \"%s\"" % (len(points), fname))
f.write("Coffee:\n")
f.write(ui.coffee.text()+'\n')
f.write("Notes:\n")
f.writelines(ui.notes.toPlainText()+'\n')
f.write("Time,Temperature,Event\n");
for p in points:
f.write("%f,%f,\"%s\"\n" % (p.x()*60.0, p.y(), p.label()))
f.close()
#############################
# save using a file dialog
def bSaveAs():
filename = QFileDialog.getOpenFileName(pyRoast, "Profile File", "", "*.csv")
if (filename):
#filename = os.path.relpath(filename)
filename = str(filename)
if (os.path.dirname(filename) == os.path.realpath(os.curdir)):
filename = os.path.basename(filename)
# ui.tFileName.setText(filename)
bSave()
###############
# shutdown
def bQuit():
global pcontrol
# kill off the meter reader child
# if (not simulate_temp):
# os.kill(dmm.pid, signal.SIGTERM)
if (pcontrol is not None):
pcontrol.write("0%\r\n")
pcontrol.setDTR(0)
pyRoast.close()
################
# setup the plot
# parameters
def SetupPlot(plot, dmmPlot, profile):
plot.setLimits(0.0, gMaxTime, 0.0, gMaxTemp)
plot.axis(0).setLabel("Temperature (" + u'\N{DEGREE SIGN}' + "F)")
plot.axis(1).setLabel("Time (minutes)")
plot.axis(2).setLabel("power")
plot.addPlotObject(dmmPlot)
plot.addPlotObject(profile)
###################################
def grabTemperature():
temp = ''
if os.path.exists('/dev/ttyUSB0'):
ser = serial.Serial('/dev/ttyUSB0')
time0 = time.time()
if ser.isOpen():
while 1:
line = ser.readline()
match1 = re.search('F =', line)
if match1:
match = re.search('[0-9]+.[0-9]+', line)
if match:
return float(match.group())
else:
return 0.1
####################
# called when we get a temp value
def GotTemperature(temp):
global CurrentTemperature, MaxTemperature, TemperatureArray
if (len(TemperatureArray) >= gTempArraySize):
del TemperatureArray[:1]
if (temp <= 0.0):
return
TemperatureArray.append(temp)
CurrentTemperature = sum(TemperatureArray) / len(TemperatureArray)
if (CurrentTemperature > MaxTemperature):
MaxTemperature = CurrentTemperature
ui.tCurrentTemperature.setText("%.1f" % CurrentTemperature)
ui.tMaxTemperature.setText("%.1f" % MaxTemperature)
ui.tRateOfChange.setText(("%.1f" + u'\N{DEGREE SIGN}' + "C/m") % RateOfChange())
# PowerControl()
############################
# work out the rate of change
# of the temperature
def RateOfChange():
points = dmmPlot.points()
numpoints = len(points)
if (numpoints < 10):
return 0
x1 = 0
x2 = points[-1].x()
y2 = points[-1].y()
for i in range(2,numpoints-2):
if (x2 - points[-i].x() > 5.0/60):
x1 = points[-i].x()
y1 = points[-i].y()
break;
if (x1 == 0):
return 0
return (y2-y1)/(x2-x1)
def DeltaT(T, P, Tbase):
r=0.0085
k=0.0040
return r*P - k*(T-Tbase)
############################
# simulate temperature profile
def SimulateTemperature():
global sim_last_time, sim_base_temp, current_power
global TempCells, NumCells
if (sim_last_time == 0):
sim_last_time = ElapsedTime()
GotTemperature(sim_last_temp)
TempCells = {}
NumCells = 40
for i in range(0, NumCells):
TempCells[i] = sim_base_temp
return
t = ElapsedTime()
elapsed = (t - sim_last_time)
# the CS DMM gives a value every 0.5 seconds
if (elapsed < 0.5):
return
sim_last_time = t
TempCells[0] += DeltaT(TempCells[0], current_power, sim_base_temp) * elapsed
for i in range(1, NumCells):
TempCells[i] = (TempCells[i-1] + TempCells[i])/2
GotTemperature(TempCells[NumCells-1])
############################
# simulate temperature profile
def OLD_SimulateTemperature():
global sim_last_time, sim_last_temp, sim_base_temp
global PowerArray, PowerArraySize;
if (sim_last_time == 0):
sim_last_time = ElapsedTime()
sim_last_temp = sim_base_temp
GotTemperature(sim_last_temp)
PowerArray = {};
PowerArraySize = 50
return
t = ElapsedTime()
ielapsed = int(t)
elapsed = (t - sim_last_time)
# the CS DMM gives a value every 0.5 seconds
if (elapsed < 0.5):
return
sim_last_time = t
PowerArray[str(ielapsed)] = current_power;
if (PowerArray.has_key(str(ielapsed-PowerArraySize))):
del PowerArray[str(ielapsed-PowerArraySize)]
power = 0
count = 0
for i in range(0,PowerArraySize):
if (PowerArray.has_key(str(ielapsed-i))):
power += PowerArray[str(ielapsed-i)]
count = count + 1
power = power / count
sim_last_temp += DeltaT(sim_last_temp, power, sim_base_temp) * elapsed
DebugMessage(("sim_last_temp=%.2f current_power=%.2f sim_base_temp=%.2f elapsed=%.2f DeltaT=%.2f" % (sim_last_temp, current_power, sim_base_temp, elapsed, DeltaT(sim_last_temp, power, sim_base_temp))))
GotTemperature(sim_last_temp)
############################
# check for input from the DMM
def CheckDMMInput():
global CurrentTemperature, MaxTemperature
if (simulate_temp):
SimulateTemperature()
return
temp = grabTemperature()
# temp = 12
# print ui.sPowerSlider.value()
ser = serial.Serial('/dev/ttyUSB0')
ser.write('n'+str(ui.sPowerSlider.value()))
GotTemperature(temp)
############################
# Find all saved roasts and populate them in combobox
# load notes as well
def findRoasts():
savedRoasts = glob.glob('Roasts/*.csv')
for roast in savedRoasts:
roast = roast.replace('Roasts/', '')
ui.tLoadFile.addItem(roast)
return
############################
# called once a second
def tick():
global CurrentTemperature
elapsed = (ElapsedTime())/60.0
CheckDMMInput()
if (CurrentTemperature != 0):
dmmPlot.addPoint(elapsed, CurrentTemperature, "")
ui.tElapsed.setText(TimeString());
ui.TemperaturePlot.update()
#############################
# choose a reasonable default
# file name
def ChooseDefaultFileName():
fname = time.strftime("%Y%m%d") + ".csv";
i=1
while (os.path.exists(fname)):
i = i+1
fname = time.strftime("%Y%m%d") + "-" + str(i) + ".csv";
# ui.tFileName.setText(fname)
#############################
def usage():
print """
Usage: pyRoast.py [options]
Options:
-h show this help
--verbose verbose messages
--simulate simulate temperature readings
--profile PROFILE preload a profile
--pcontrol FILE send PID power control to FILE
--smooth N smooth temperature over N values
"""
############################################
# main program
if __name__ == "__main__":
import sys
try:
opts, args = getopt.getopt(sys.argv[1:], "h",
["help", "smooth=", "pcontrol=",
"profile=", "simulate", "verbose",
"speedup=","maxtemp=","maxtime="])
except getopt.GetoptError, err:
print str(err)
usage()
sys.exit(2)
for o,a in opts:
if o in ("-h", "--help"):
usage()
sys.exit(1)
elif o in ("--verbose"):
verbose = True
elif o in ("--simulate"):
simulate_temp = True
elif o in ("--speedup"):
time_speedup = int(a)
elif o in ("--maxtemp"):
gMaxTemp = int(a)
elif o in ("--maxtime"):
gMaxTime = int(a)
elif o in ("--smooth"):
gTempArraySize = int(a)
elif o in ("--profile"):
profile_file = a
elif o in ("--pcontrol"):
pcontrol_dev = a
else:
assert False, "unhandled option"
app = QtGui.QApplication(sys.argv)
pyRoast = QtGui.QMainWindow()
ui = Ui_pyRoast()
ui.setupUi(pyRoast)
# create plot of multimeter
dmmPlot = KPlotObject(gPlotColor, KPlotObject.Lines,
6, KPlotObject.Circle)
LoadedProfile = KPlotObject(gProfileColor, KPlotObject.Lines,
6)
SetupPlot(ui.TemperaturePlot, dmmPlot, LoadedProfile)
pyRoast.setWindowTitle("pyRoast")
findRoasts()
# connect up the buttons
QtCore.QObject.connect(ui.bQuit, QtCore.SIGNAL("clicked()"), bQuit)
QtCore.QObject.connect(ui.bSave, QtCore.SIGNAL("clicked()"), bSave)
QtCore.QObject.connect(ui.bSaveAs, QtCore.SIGNAL("clicked()"), bSaveAs)
QtCore.QObject.connect(ui.bReset, QtCore.SIGNAL("clicked()"), bReset)
# QtCore.QObject.connect(ui.bLoadProfile, QtCore.SIGNAL("clicked()"), bLoadProfile)
QtCore.QObject.connect(ui.bFirstCrack, QtCore.SIGNAL("clicked()"), bFirstCrack)
QtCore.QObject.connect(ui.bRollingFirstCrack,
QtCore.SIGNAL("clicked()"), bRollingFirstCrack)
QtCore.QObject.connect(ui.bSecondCrack, QtCore.SIGNAL("clicked()"), bSecondCrack)
QtCore.QObject.connect(ui.bRollingSecondCrack,
QtCore.SIGNAL("clicked()"), bRollingSecondCrack)
QtCore.QObject.connect(ui.tLoadFile, QtCore.SIGNAL("currentIndexChanged(QString)"), LoadProfile)
ctimer = QtCore.QTimer()
QtCore.QObject.connect(ctimer, QtCore.SIGNAL("timeout()"), tick)
ctimer.start(int((1000 * gUpdateFrequency) / time_speedup))
# get the current time
StartTime = time.time()
TemperatureArray = []
CurrentTemperature = 0.0
MaxTemperature = 0.0
current_power = 0
ui.tPower.setText("%3u%%" % current_power)
ui.sPowerSlider.setValue(current_power)
ui.cAutoPower.setChecked(True)
# start the dmm child
# if (not simulate_temp):
# dmm = subprocess.Popen(rmr, stdout=subprocess.PIPE)
# dmm_file = dmm.stdout
if (pcontrol_dev is not None):
AddMessage("opening power control " + pcontrol_dev);
#pcontrol = PcontrolOpen(pcontrol_dev)
# set a default file name
ChooseDefaultFileName()
ui.CSLogo.setPixmap(QtGui.QPixmap('cslogo.png'))
if (profile_file is not None):
LoadProfile(profile_file)
AddMessage("Welcome to pyRoast " + gVersion);
pyRoast.show()
sys.exit(app.exec_())