from machine import Pin, PWM
import time

buzzer = PWM(Pin(15))  # Use GPIO15 for the buzzer

def play_tone(frequency, duration, volume):
    """
    Plays a tone on the buzzer.
    
    :param frequency: Pitch of the sound (in Hz)
    :param duration: Duration of the sound (in seconds)
    :param volume: Loudness (0-100%, mapped to 0-65535 PWM duty cycle)
    """
    if frequency > 0:
        buzzer.freq(frequency)  # Set pitch
        duty = int((volume / 100) * 65535)  # Convert volume to duty cycle
        buzzer.duty_u16(duty)  # Set loudness
        time.sleep(duration)  # Play for given duration
        buzzer.duty_u16(0)  # Stop sound
    else:
        buzzer.duty_u16(0)  # Silence
notes = [
    (262, 0.5, 50),  # C4, 50% volume
    (294, 0.5, 60),  # D4
    (330, 0.5, 70),  # E4
    (349, 0.5, 80),  # F4
    (392, 0.5, 90),  # G4
    (440, 0.5, 100), # A4
    (494, 0.5, 100), # B4
    (523, 1.0, 100), # C5
]

for freq, dur, vol in notes:
    play_tone(freq, dur, vol)
    time.sleep(0.1)  # Short gap between notes

buzzer.deinit()