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espressoGUI.py
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espressoGUI.py
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"""
Espresso Controller
GUI & Web Server
"""
import threading
import time
from remi import start, gui, App
from systemcontrol.heaterPWM import SoftwarePWM
from systemcontrol.max31855 import SoftwareSPI
from systemcontrol.pid import PID
class Espresso(App):
def __init__(self, *args):
super(Espresso, self).__init__(*args)
def main(self):
self.setTemp = 105
self.calibrationOffset = 0 # Added to thermocouple output.
self.boilerTemp = 0
self.tempStarted = False
self.heaterPIDStarted = False
self.tempProbe = SoftwareSPI()
self.pid = PID(5,1,0.04)
self.pid.setSetPoint(self.setTemp)
mainContainer = gui.Widget(width=320)
verticalContainer = gui.Widget(width='100%', layout_orientation=gui.Widget.LAYOUT_VERTICAL)
verticalContainer.style['text-align'] = 'center'
verticalContainer.style['margin'] = '2em auto'
verticalContainer.style['height'] = '100%'
subContainer = gui.Widget(width='auto', height=160)
subContainer.style['text-align'] = 'center'
switchContainer = gui.Widget(width='auto', height=160)
switchContainer.style['text-align'] = 'center'
self.power = False
self.powerSwitch = gui.PrettySwitch('Power', False)
self.powerSwitch.attributes['class'] = 'switch'
self.powerSwitch.style['height'] = '58px'
self.powerSwitch._label.attributes['for'] = 's1'
self.powerSwitch._label.attributes['class'] = 'slider-v1'
self.powerSwitch._checkbox.attributes['id'] = 's1'
self.powerSwitch._label.set_on_mouseup_listener(self, 'on_power_change')
self.steam = False
self.steamSwitch = gui.PrettySwitch('Steam', False)
self.steamSwitch.attributes['class'] = 'switch'
self.steamSwitch.style['height'] = '58px'
self.steamSwitch._label.attributes['for'] = 's2'
self.steamSwitch._label.attributes['class'] = 'slider-v1'
self.steamSwitch._checkbox.attributes['id'] = 's2'
self.steamSwitch._label.set_on_mouseup_listener(self, 'on_steam_change')
self.tempLabel = gui.Label(str(self.boilerTemp)+' ')
self.tempLabel.attributes['class'] = 'tempLabel'
self.tempLabel.style['display'] = 'inline'
self.degreeLabel = gui.Label(u'\N{DEGREE SIGN}'+'C')
self.degreeLabel.attributes['class'] = 'degreeLabel'
self.degreeLabel.style['display'] = 'inline'
self.count = 0
self.counter = gui.Label('', width=200, height=30)
self.lbl = gui.Label('This is a LABEL!', width=200, height=30)
self.dummyUpdated = gui.Label('') # Blank widget to add to the page for forcing an update.
# When a switch changes from a remote GUI, the local GUI doesn't update automagically.
# So, forcing an update by adding this dummy to the scene.
# Replace with something better eventually.
subContainer.append(self.tempLabel)
subContainer.append(self.degreeLabel)
switchContainer.append(self.powerSwitch)
switchContainer.append(self.dummyUpdated)
self.switchContainer = switchContainer
verticalContainer.append(switchContainer)
verticalContainer.append(subContainer)
mainContainer.append(verticalContainer)
self.display_counter()
if self.tempStarted == False:
t = threading.Thread(target=self.tempProbe.initiateSPI, args=(50, 200)) # 50% Duty, 60 Hz
t.daemon = True
t.start()
self.tempStarted = True
self.temperature_display()
self.startPID()
# returning the root widget
return verticalContainer
def on(self):
print('on from URL')
currentlyOn = self.power
self.power = True
self.powerSwitch._checkbox.set_value(self.power)
if not currentlyOn:
self.pid.setSetPoint(self.setTemp)
self.lbl.set_text('ON')
self.steamSwitch._checkbox.set_value(False)
time.sleep(0.25)
self.switchContainer.append(self.steamSwitch)
def off(self):
print('off from URL')
currentlyOn = self.power
self.power = False
self.powerSwitch._checkbox.set_value(self.power)
if currentlyOn:
self.lbl.set_text('OFF')
time.sleep(0.25)
self.switchContainer.remove_child(self.steamSwitch)
self.steam = False
def getStatus(self):
return self.power
def startPID(self):
if self.heaterPIDStarted == False:
self.heaterController = SoftwarePWM(27)
self.heaterController.pwmUpdate(0, 0.83333) # 1% steps when controlling 60 Hz mains.
print('Initiated Heater PWM.')
self.heaterPIDStarted = True
if self.power == False:
self.heaterController.pwmUpdate(0, 0.83333)
elif (self.power == True):
pidOutputReal = self.pid.update(float(self.boilerTemp))
pidOutput = pidOutputReal
if pidOutput > 100:
pidOutput = 100
elif pidOutput < 0:
pidOutput = 0
print('Updating PID with: '+str(self.boilerTemp))
print('PID Output: '+str(pidOutputReal))
print('PID Output Fixed: '+str(int(pidOutput)))
self.heaterController.pwmUpdate(int(pidOutput), 0.83333)
threading.Timer(0.416666, self.startPID).start() # Repeat twice as fast as the PWM cycle
def on_power_change(self, x, y):
self.power = not self.power
self.powerSwitch._checkbox.set_value(self.power)
if self.power:
self.pid.setSetPoint(self.setTemp)
self.lbl.set_text('ON')
self.steamSwitch._checkbox.set_value(False)
time.sleep(0.25)
self.switchContainer.append(self.steamSwitch)
else:
self.lbl.set_text('OFF')
time.sleep(0.25)
self.switchContainer.remove_child(self.steamSwitch)
self.steam = False
def on_steam_change(self, x, y):
self.steam = not self.steam
if self.steam:
self.lbl.set_text('Steam ON')
self.pid.setSetPoint(140)
else:
self.lbl.set_text('Steam OFF')
self.pid.setSetPoint(self.setTemp)
self.steamSwitch._checkbox.set_value(self.steam)
time.sleep(0.25)
self.switchContainer.remove_child(self.dummyUpdated)
self.switchContainer.append(self.dummyUpdated)
def display_counter(self):
self.counter.set_text('Running Time: ' + str(self.count))
self.count += 1
threading.Timer(1, self.display_counter).start()
def temperature_display(self):
currentTemp = self.tempProbe.getTemp() + self.calibrationOffset
self.boilerTemp = "{:.2f}".format(float(currentTemp))
self.tempLabel.set_text(str(self.boilerTemp))
threading.Timer(0.5, self.temperature_display).start()
def on_button_pressed(self):
self.lbl.set_text('Button pressed! ')
self.bt.set_text('Hi!')
def on_spin_change(self, newValue):
self.lbl.set_text('SpinBox changed, new value: ' + str(newValue))
def slider_changed(self, value):
self.lbl.set_text('New slider value: ' + str(value))
if __name__ == "__main__":
# start(MyApp,address='127.0.0.1', port=8081, multiple_instance=False,enable_file_cache=True, update_interval=0.1, start_browser=True)
start(Espresso, debug=True, address='0.0.0.0')