48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
from src.variables.service import get_variable, set_variable
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from gpiozero import Button
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import datetime
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pulses_per_rotation = 4
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reader = Button(4, pull_up=False, bounce_time=0.0005)
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set_variable("speed_reader_last_impulse_time", datetime.datetime.now(), False)
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set_variable("actual_rpm_unfiltered", 0, False)
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set_variable("impulses", 0, False)
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set_variable("last_calc_time", datetime.datetime.now(), False)
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def event():
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actual = datetime.datetime.now()
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last = get_variable("speed_reader_last_impulse_time")
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difference = (actual - last).total_seconds()
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set_variable("speed_reader_last_impulse_time", actual, False)
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rpm = (60 / difference) / pulses_per_rotation
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actual_rpm = (float(get_variable("actual_rpm_unfiltered")) + rpm) / 2
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set_variable("actual_rpm_unfiltered", rpm, False)
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set_variable("actual_rpm", round(actual_rpm, 1), False)
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print(round(actual_rpm, 1))
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def new_event():
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set_variable("impulses", int(get_variable("impulses")) + 1, False)
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def speed_calc():
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now = datetime.datetime.now()
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last_time = get_variable("last_calc_time")
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set_variable("last_calc_time", datetime.datetime.now(), False)
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impulses = int(get_variable("impulses"))
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set_variable("impulses", 0, False)
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time_delta = (now - last_time).total_seconds()
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actual_rpm = (impulses/pulses_per_rotation) * (60/time_delta)
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set_variable("actual_rpm", round(actual_rpm, 1), False)
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print(actual_rpm)
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reader.when_pressed = new_event
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