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