51 lines
1.5 KiB
Python
51 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, os, json
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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("rpm_filter", json.dumps([0]), False)
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if get_variable("rpm_filter_count") == None:
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set_variable("rpm_filter_count", 8, True)
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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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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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rpm_filter = json.loads(get_variable("rpm_filter"))
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print(rpm_filter)
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while len(rpm_filter) > int(get_variable("rpm_filter_count")):
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rpm_filter.remove(rpm_filter[0])
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rpm_filter.append(rpm)
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set_variable("rpm_filter", json.dumps(rpm_filter), False)
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average = 0
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for i in rpm_filter:
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average = average + i
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actual_rpm = average / len(rpm_filter)
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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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reader.when_pressed = event
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