树莓派 有源蜂鸣器

import RPi.GPIO as GPIO
import time

trig = 2


def init():
    GPIO.setwarnings(False)
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(trig, GPIO.OUT, initial=GPIO.HIGH)
    pass


def beep(seconds):
    GPIO.output(trig, GPIO.LOW)
    time.sleep(seconds)
    GPIO.output(trig, GPIO.HIGH)


def beepBatch(seconds, timespan, counts):
    for i in range(counts):
        beep(seconds)
        time.sleep(timespan)


init()
# beep(0.1)
beepBatch(0.1, 0.3, 3)

GPIO.cleanup()

控制的是GPIO02,beepBatch(蜂鸣器响应时间，蜂鸣器停顿时间，蜂鸣器响应次数)