博客

1、参考下面连接好设备：

树莓派 有源蜂鸣器

GPIO17 SIG（信号、数据针脚）

3.3V VCC（+、正极）

GND GND （负极、—）

我的有源蜂鸣器没有SIG，但是有I/O，也是连接的GPIO17，也可以正常工作

树莓派引脚图

2、修改下列文件实现自己需要的功能

#!/usr/bin/env python
# shumeipai.net
import RPi.GPIO as GPIO
import time

Buzzer = 11  # pin11


def setup(pin):
    global BuzzerPin
    BuzzerPin = pin
    GPIO.setmode(GPIO.BOARD)  # Numbers GPIOs by physical location
    GPIO.setup(BuzzerPin, GPIO.OUT)
    GPIO.output(BuzzerPin, GPIO.HIGH)


def on():
    GPIO.output(BuzzerPin, GPIO.LOW)


def off():
    GPIO.output(BuzzerPin, GPIO.HIGH)


def beep(x):
    on()
    time.sleep(x)
    off()
    time.sleep(x)


def loop():
    while True:
        beep(0.5)


def destroy():
    GPIO.output(BuzzerPin, GPIO.HIGH)
    GPIO.cleanup()  # Release resource


if __name__ == '__main__':  # Program start from here
    setup(Buzzer)
    try:
        loop()
    except KeyboardInterrupt:  # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
        destroy()