64 lines
1.3 KiB
Python
64 lines
1.3 KiB
Python
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# Imports
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from machine import Pin, PWM
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import time
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# Set up the LED pins
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red = Pin(18, Pin.OUT)
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amber = Pin(19, Pin.OUT)
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green = Pin(20, Pin.OUT)
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# Set up the Buzzer pin as PWM
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buzzer = PWM(Pin(13))
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# Set PWM duty to 0% at program start
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buzzer.duty_u16(0)
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# Set up PIR pin with pull down
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pir = Pin(26, Pin.IN, Pin.PULL_DOWN)
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# Warm up/settle PIR sensor
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print("Warming up...")
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time.sleep(10) # Delay to allow the sensor to settle
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print("Sensor ready!")
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def alarm(): # Our alarm function
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# Set PWM duty (volume up)
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buzzer.duty_u16(500)
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for i in range(5): # Run this 5 times
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buzzer.freq(1000) # Higher pitch
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red.value(1) # Red ON
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amber.value(1) # Amber ON
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green.value(1) # Green ON
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time.sleep(1)
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buzzer.freq(500) # Lower pitch
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red.value(0) # Red OFF
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amber.value(0) # Amber OFF
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green.value(0) # Green OFF
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time.sleep(1)
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# Set PWM duty (volume off)
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buzzer.duty_u16(0)
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while True: # Run forever
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time.sleep(0.01) # Delay to stop unnecessary program speed
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if pir.value() == 1: # If PIR detects movement
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print("Bewegung erkannt!")
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alarm() # Call our function
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print("Sensor aktiv") # Let us know that the sensor is active again
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