def cool(parameters):
"""
Turn on the cooler and reach a target temperature.
:param parameters:
dictionary
'temp' - the desired temperature
:return:
None
"""
targetTemp = parameters['temp']
celery.logger.info('cooling water to ' + str(targetTemp) + '...')
hardware.turnCoolerOn()
while hardware.getTemp() > targetTemp:
hardware.sleep(0.5)
hardware.turnCoolerOff()
def stir(parameters):
"""
Turn on the stirrer for a predefined amount of time.
:param parameters:
dictionary
'time' - the amount of time to turn on the stirrer for
:return:
None
"""
duration = parameters['time']
interval = 0.5
start = hardware.secondSinceStart()
hardware.turnStirrerOn()
while (hardware.secondSinceStart() - start) < duration:
hardware.sleep(interval)
hardware.turnStirrerOff()
def maintain(parameters):
"""
Maintain a certain temperature using either the cooler or heater for a specified amount of time.
:param parameters:
dictionary
'temp' - the desired temperature
'tolerance' - how much above or below the desired temperature to let
the temperature drift before turning on the heater/cooler again
'time' - the amount of time to maintain the temperature in seconds
'type' - one of:
- heat
Maintain temperature using heater.
- cool
Maintain temperature using cooler.
:return:
None
"""
duration = parameters['time']
targetTemp = parameters['temp']
tolerance = parameters['tolerance']
type = parameters['type']
interval = 0.5
start = hardware.secondSinceStart()
while (hardware.secondSinceStart() - start) < duration:
hardware.sleep(interval)
currentTemp = hardware.getTemp()
celery.logger.info('temperature @ ' + str(currentTemp))
if currentTemp - tolerance > targetTemp:
if type == 'heat':
hardware.turnHeaterOff()
else:
hardware.turnCoolerOn()
if currentTemp + tolerance < targetTemp:
if type == 'heat':
hardware.turnHeaterOn()
else:
hardware.turnCoolerOff()
hardware.turnHeaterOff()
hardware.turnCoolerOff()
def heat(parameters):
targetTemp = parameters['temp']
celery.logger.info('heating water to ' + str(targetTemp) + '...')
hardware.turnHeaterOn()
while hardware.getTemp() < targetTemp:
hardware.sleep(0.5)