from gpiozero import PWMOutputDevice
from time import sleep

buzzer = PWMOutputDevice(17)

while True:
    buzzer.frequency = 1000   # 頻率（Hz，1000Hz 約為嗶聲）
    buzzer.value = 0.5        # 音量（0~1）
    sleep(1)

    buzzer.off()
    sleep(1)