SunFounder Thales Kit, Руководство пользователя

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SunFounder Thales Kit for Raspberry Pi Pico, Release 1.0
Code
When the program is executed, if someone walks into the PIR detection range, the buzzer will be’BEEP BEEP’ for 5
seconds!
import machine
import utime
pir_sensor = machine . Pin( 14 , machine . Pin . IN)
buzzer = machine . Pin( 15 , machine . Pin . OUT)
def motion_detected (pin):
for i in range ( 50 ):
buzzer . toggle()
utime . sleep_ms( 100 )
pir_sensor . irq(trigger = machine . Pin . IRQ_RISING, handler = motion_detected)
print ( "Intruder Alarm Start!" )
What more?
PIR is a very sensitive sensor. In order to adapt it to the environment of use, it needs to be adjusted. Let the side with
the 2 potentiometers facing you, turn both potentiometers counterclockwise to the end and insert the jumper cap on
the pin with L and the middle pin.
Copy the following code into Thonny and run it, let us analyze its adjustment method along with the experimental
results.
import machine
import utime
pir_sensor = machine . Pin( 14 , machine . Pin . IN)
global timer_delay
timer_delay = utime . ticks_ms()
print
( "start" )
def pir_in_high_level (pin):
global timer_delay
pir_sensor . irq(trigger = machine . Pin . IRQ_FALLING, handler = pir_in_low_level)
intervals = utime . ticks_diff(utime . ticks_ms(), timer_delay)
timer_delay = utime . ticks_ms()
print ( "the dormancy duration is " + str (intervals) + "ms" )
def pir_in_low_level (pin):
global timer_delay
pir_sensor . irq(trigger = machine . Pin . IRQ_RISING, handler = pir_in_high_level)
intervals2 = utime . ticks_diff(utime . ticks_ms(), timer_delay)
timer_delay = utime . ticks_ms()
print ( "the duration of work is " + str (intervals2) + "ms" )
pir_sensor . irq(trigger = machine . Pin . IRQ_RISING, handler = pir_in_high_level)
74 Chapter 3. For MicroPython User