45 lines
1.6 KiB
Python
45 lines
1.6 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, os, json
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pulses_per_rotation = 8
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reader = Button(4, pull_up=False, bounce_time=0.0005)
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set_variable("rpm_pulses_counter", "[]", False)
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set_variable("rpm_time_span_sec", 1, False)
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def printer(text):
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if bool(os.getenv("DEBUG")):
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print(text)
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def event():
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actual = datetime.datetime.now()
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printer("Impulse readed")
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rpm_pulses_counter = [datetime.datetime.fromisoformat(t) for t in json.loads(get_variable("rpm_pulses_counter"))]
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printer(rpm_pulses_counter)
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rpm_pulses_counter.append(actual)
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set_variable("rpm_pulses_counter", json.dumps([t.isoformat() for t in rpm_pulses_counter]), False)
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rpm_time_span_sec = int(get_variable("rpm_time_span_sec"))
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pulses = len([t for t in rpm_pulses_counter if (actual - t).total_seconds() <= rpm_time_span_sec])
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actual_rpm = (pulses / pulses_per_rotation) * (60 / rpm_time_span_sec)
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set_variable("actual_rpm", round(actual_rpm, 1), False)
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printer("Measured RPM: {}".format(round(actual_rpm, 1)))
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def remover():
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actual = datetime.datetime.now()
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rpm_pulses_counter = [datetime.datetime.fromisoformat(t) for t in json.loads(get_variable("rpm_pulses_counter"))]
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rpm_time_span_sec = int(get_variable("rpm_time_span_sec")) + 1
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printer("cleaning event")
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rpm_pulses_counter = [t for t in rpm_pulses_counter if (actual - t).total_seconds() <= rpm_time_span_sec]
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set_variable("rpm_pulses_counter", json.dumps([t.isoformat() for t in rpm_pulses_counter]), False)
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reader.when_pressed = event
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