from machine import Pin, PWM
from utime import sleep

# creating a PWM object
buzzer = PWM(Pin(15, Pin.OUT)) 

# Settings
buzzer.freq(1000)
push_bt = Pin(0, Pin.IN, Pin.PULL_UP)

while True:
    print("push btn = ", push_bt.value()) 
    if (push_bt.value() == 0):
        #tune=440, duration=1, volume=1, n=1, wait=True):
        buzzer.duty_u16(32768)
    else:
        buzzer.duty_u16(0)

    sleep(0.5)