77 lines
2.3 KiB
Python
77 lines
2.3 KiB
Python
# SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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import time
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import random
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class FlowMeter():
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PINTS_IN_A_LITER = 2.11338
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SECONDS_IN_A_MINUTE = 60
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MS_IN_A_SECOND = 1000.0
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displayFormat = 'metric'
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beverage = 'beer'
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enabled = True
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clicks = 0
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lastClick = 0
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clickDelta = 0
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hertz = 0.0
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flow = 0 # in Liters per second
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thisPour = 0.0 # in Liters
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totalPour = 0.0 # in Liters
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def __init__(self, displayFormat, beverage):
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self.displayFormat = displayFormat
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self.beverage = beverage
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self.clicks = 0
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self.lastClick = int(time.time() * FlowMeter.MS_IN_A_SECOND)
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self.clickDelta = 0
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self.hertz = 0.0
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self.flow = 0.0
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self.thisPour = 0.0
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self.totalPour = 0.0
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self.enabled = True
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def update(self, currentTime):
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self.clicks += 1
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# get the time delta
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self.clickDelta = max((currentTime - self.lastClick), 1)
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# calculate the instantaneous speed
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if (self.enabled == True and self.clickDelta < 1000):
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self.hertz = FlowMeter.MS_IN_A_SECOND / self.clickDelta
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self.flow = self.hertz / (FlowMeter.SECONDS_IN_A_MINUTE * 7.5) # In Liters per second
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instPour = self.flow * (self.clickDelta / FlowMeter.MS_IN_A_SECOND)
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self.thisPour += instPour
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self.totalPour += instPour
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# Update the last click
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self.lastClick = currentTime
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def getBeverage(self):
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return str(random.choice(self.beverage))
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def getFormattedClickDelta(self):
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return str(self.clickDelta) + ' ms'
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def getFormattedHertz(self):
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return str(round(self.hertz,3)) + ' Hz'
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def getFormattedFlow(self):
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if(self.displayFormat == 'metric'):
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return str(round(self.flow,3)) + ' L/s'
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else:
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return str(round(self.flow * FlowMeter.PINTS_IN_A_LITER, 3)) + ' pints/s'
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def getFormattedThisPour(self):
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if(self.displayFormat == 'metric'):
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return str(round(self.thisPour,3)) + ' L'
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else:
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return str(round(self.thisPour * FlowMeter.PINTS_IN_A_LITER, 3)) + ' pints'
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def getFormattedTotalPour(self):
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if(self.displayFormat == 'metric'):
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return str(round(self.totalPour,3)) + ' L'
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else:
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return str(round(self.totalPour * FlowMeter.PINTS_IN_A_LITER, 3)) + ' pints'
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def clear(self):
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self.thisPour = 0;
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self.totalPour = 0;
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