forked from platypush/platypush
51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
import time
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import RPi.GPIO as gpio
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from platypush.backend import Backend
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from platypush.message.event.sensor.light import LightOnEvent, LightOffEvent
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class SensorLightBackend(Backend):
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state = None
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def __init__(self, pin, threshold=0.5, poll_seconds=0.5, **kwargs):
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super().__init__(**kwargs)
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self.pin = pin
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self.threshold = threshold
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self.poll_seconds = poll_seconds
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def send_message(self, msg):
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pass
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def get_state(self):
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return self.state
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def run(self):
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super().run()
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gpio.setmode(gpio.BCM)
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gpio.setup(self.pin, gpio.IN)
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self.logger.info('Initialized light sensor backend on pin {}'.format(self.pin))
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try:
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while not self.should_stop():
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value = float(gpio.input(self.pin))
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new_state = True if value >= self.threshold else False
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if self.state is not None and new_state != self.state:
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if new_state is True:
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self.bus.post(LightOnEvent())
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else:
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self.bus.post(LightOffEvent())
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self.state = new_state
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time.sleep(self.poll_seconds)
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finally:
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gpio.cleanup()
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# vim:sw=4:ts=4:et:
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