from machine import Pin, PWM
import time

# Pin configuration
speaker_pin = Pin(33)
speaker_pwm = PWM(speaker_pin)

for i in range(1,11):
    speaker_pwm.freq(i*100)  # Frequency for low tone
    print(f" freq {i*100}")
    speaker_pwm.duty(512)
    time.sleep(0.5)
    speaker_pwm.duty(0)  # Turn off the PWM
    time.sleep(0.5)