초음파 센서로 움직임 감지하여 led, buzzer 작동하기

 

import threading
import RPi.GPIO as g
import time
import datetime

def buzer_function() :
    buzzer = 18

    g.setmode(g.BCM)
    g.setup(buzzer, g.OUT)

    print ( "Buzzer => On, ", counter )

    pwm = g.PWM(buzzer, 1)
    pwm.start(50.0)

    time.sleep(1)

def swave_function():
    global  counter

    trig = 2
    echo = 3

    g.setmode(g.BCM)                     
    g.setup(trig, g.OUT)                  
    g.setup(echo, g.IN)                    

    print ( "Press Ctrl + C to quit" )   

    while True:
        now = time

        now_compare = datetime.datetime.now()
        today18 = now_compare.replace(hour=8, minute=0, second=0, microsecond=0)
        today22 = now_compare.replace(hour=22, minute=0, second=0, microsecond=0)

        if ( now_compare >  today18 and now_compare <  today22 ) :

            g.output(trig, False)
            time.sleep(0.4)

            g.output(trig, True)         
            time.sleep(0.00001)           
            g.output(trig, False)         

            while g.input(echo) == 0:    
                start = time.time()

            while g.input(echo) == 1:  
                stop = time.time()

            time_interval = stop - start      
            distance = time_interval * 17000
            distance = round(distance, 2)

            print ( now.strftime('%H:%M:%S'), " Distance => ", distance, "cm ,", counter)

            if ( distance < 160 ) :
                print ( "Buzzer => On, ", counter )
                counter += 1

                if ( counter == 2 ) :
                    buzer_function()
                    
                    time.sleep(1)

def delay_function():
    global  counter

    while True:
        print("Count =>", counter)
        time.sleep(6)
        counter = 0

def pir_function() :
    global  counter

    sensor = 14
    
    g.setmode(g.BCM)
    g.setup(sensor,g.IN)

    print("Waiting for a sensor to settle.\nPress Ctrl + C to quit\n")
    time.sleep(1)
    
    while(True):
        now = time

        now_compare = datetime.datetime.now()
        today18 = now_compare.replace(hour=8, minute=0, second=0, microsecond=0)
        today22 = now_compare.replace(hour=22, minute=0, second=0, microsecond=0)

        if ( now_compare >  today18 and now_compare <  today22 ) :
            time.sleep(0.4)

            if g.input(sensor):
                print(now.strftime('%H:%M:%S'),"Motion Detected", counter)
                counter += 1

                if ( counter == 1 ) :
                    buzer_function()
                    
                    time.sleep(1)

            else:
                print(now.strftime('%H:%M:%S'), "Motion ..........", counter)


def main_thread():

	thread=threading.Thread(target=pir_function) 
	thread.daemon=True 
	thread.start() 

if __name__ == "__main__":

    global  counter
    counter = 0

    try :
        main_thread()
        delay_function()
        # pir_function()
    except KeyboardInterrupt:
        print ( "bye~" )
    finally:
        g.cleanup()